Improve detection of ncurses.h

6 files changed, 2050 insertions, 525 deletions

diff --git a/Makefile.in b/Makefile.in
index 776ff77..a54eda4 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -239,17 +239,16 @@ AWK = @AWK@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CFLAGS = @CFLAGS@
-CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
+CURSES_CFLAGS = @CURSES_CFLAGS@
+CURSES_LIBS = @CURSES_LIBS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
-EGREP = @EGREP@
 EXEEXT = @EXEEXT@
-GREP = @GREP@
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
@@ -270,6 +269,9 @@ PACKAGE_TARNAME = @PACKAGE_TARNAME@
 PACKAGE_URL = @PACKAGE_URL@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 SET_MAKE = @SET_MAKE@
 SHELL = @SHELL@
 STRIP = @STRIP@
diff --git a/aclocal.m4 b/aclocal.m4
index 6715ee0..f05b441 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -20,6 +20,903 @@ You have another version of autoconf.  It may work, but is not guaranteed to.
 If you have problems, you may need to regenerate the build system entirely.
 To do so, use the procedure documented by the package, typically 'autoreconf'.])])
 
+# ===========================================================================
+#    https://www.gnu.org/software/autoconf-archive/ax_require_defined.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_REQUIRE_DEFINED(MACRO)
+#
+# DESCRIPTION
+#
+#   AX_REQUIRE_DEFINED is a simple helper for making sure other macros have
+#   been defined and thus are available for use.  This avoids random issues
+#   where a macro isn't expanded.  Instead the configure script emits a
+#   non-fatal:
+#
+#     ./configure: line 1673: AX_CFLAGS_WARN_ALL: command not found
+#
+#   It's like AC_REQUIRE except it doesn't expand the required macro.
+#
+#   Here's an example:
+#
+#     AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG])
+#
+# LICENSE
+#
+#   Copyright (c) 2014 Mike Frysinger <vapier@gentoo.org>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 2
+
+AC_DEFUN([AX_REQUIRE_DEFINED], [dnl
+  m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined; is a m4 file missing?])])
+])dnl AX_REQUIRE_DEFINED
+
+# ===========================================================================
+#      https://www.gnu.org/software/autoconf-archive/ax_with_curses.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_WITH_CURSES
+#
+# DESCRIPTION
+#
+#   This macro checks whether a SysV or X/Open-compatible Curses library is
+#   present, along with the associated header file.  The NcursesW
+#   (wide-character) library is searched for first, followed by Ncurses,
+#   then the system-default plain Curses.  The first library found is the
+#   one returned. Finding libraries will first be attempted by using
+#   pkg-config, and should the pkg-config files not be available, will
+#   fallback to combinations of known flags itself.
+#
+#   The following options are understood: --with-ncursesw, --with-ncurses,
+#   --without-ncursesw, --without-ncurses.  The "--with" options force the
+#   macro to use that particular library, terminating with an error if not
+#   found.  The "--without" options simply skip the check for that library.
+#   The effect on the search pattern is:
+#
+#     (no options)                           - NcursesW, Ncurses, Curses
+#     --with-ncurses     --with-ncursesw     - NcursesW only [*]
+#     --without-ncurses  --with-ncursesw     - NcursesW only [*]
+#                        --with-ncursesw     - NcursesW only [*]
+#     --with-ncurses     --without-ncursesw  - Ncurses only [*]
+#     --with-ncurses                         - NcursesW, Ncurses [**]
+#     --without-ncurses  --without-ncursesw  - Curses only
+#                        --without-ncursesw  - Ncurses, Curses
+#     --without-ncurses                      - NcursesW, Curses
+#
+#   [*]  If the library is not found, abort the configure script.
+#
+#   [**] If the second library (Ncurses) is not found, abort configure.
+#
+#   The following preprocessor symbols may be defined by this macro if the
+#   appropriate conditions are met:
+#
+#     HAVE_CURSES             - if any SysV or X/Open Curses library found
+#     HAVE_CURSES_ENHANCED    - if library supports X/Open Enhanced functions
+#     HAVE_CURSES_COLOR       - if library supports color (enhanced functions)
+#     HAVE_CURSES_OBSOLETE    - if library supports certain obsolete features
+#     HAVE_NCURSESW           - if NcursesW (wide char) library is to be used
+#     HAVE_NCURSES            - if the Ncurses library is to be used
+#
+#     HAVE_CURSES_H           - if <curses.h> is present and should be used
+#     HAVE_NCURSESW_H         - if <ncursesw.h> should be used
+#     HAVE_NCURSES_H          - if <ncurses.h> should be used
+#     HAVE_NCURSESW_CURSES_H  - if <ncursesw/curses.h> should be used
+#     HAVE_NCURSES_CURSES_H   - if <ncurses/curses.h> should be used
+#
+#   (These preprocessor symbols are discussed later in this document.)
+#
+#   The following output variables are defined by this macro; they are
+#   precious and may be overridden on the ./configure command line:
+#
+#     CURSES_LIBS  - library to add to xxx_LDADD
+#     CURSES_CFLAGS  - include paths to add to xxx_CPPFLAGS
+#
+#   In previous versions of this macro, the flags CURSES_LIB and
+#   CURSES_CPPFLAGS were defined. These have been renamed, in keeping with
+#   AX_WITH_CURSES's close bigger brother, PKG_CHECK_MODULES, which should
+#   eventually supersede the use of AX_WITH_CURSES. Neither the library
+#   listed in CURSES_LIBS, nor the flags in CURSES_CFLAGS are added to LIBS,
+#   respectively CPPFLAGS, by default. You need to add both to the
+#   appropriate xxx_LDADD/xxx_CPPFLAGS line in your Makefile.am. For
+#   example:
+#
+#     prog_LDADD = @CURSES_LIBS@
+#     prog_CPPFLAGS = @CURSES_CFLAGS@
+#
+#   If CURSES_LIBS is set on the configure command line (such as by running
+#   "./configure CURSES_LIBS=-lmycurses"), then the only header searched for
+#   is <curses.h>. If the user needs to specify an alternative path for a
+#   library (such as for a non-standard NcurseW), the user should use the
+#   LDFLAGS variable.
+#
+#   The following shell variables may be defined by this macro:
+#
+#     ax_cv_curses           - set to "yes" if any Curses library found
+#     ax_cv_curses_enhanced  - set to "yes" if Enhanced functions present
+#     ax_cv_curses_color     - set to "yes" if color functions present
+#     ax_cv_curses_obsolete  - set to "yes" if obsolete features present
+#
+#     ax_cv_ncursesw      - set to "yes" if NcursesW library found
+#     ax_cv_ncurses       - set to "yes" if Ncurses library found
+#     ax_cv_plaincurses   - set to "yes" if plain Curses library found
+#     ax_cv_curses_which  - set to "ncursesw", "ncurses", "plaincurses" or "no"
+#
+#   These variables can be used in your configure.ac to determine the level
+#   of support you need from the Curses library.  For example, if you must
+#   have either Ncurses or NcursesW, you could include:
+#
+#     AX_WITH_CURSES
+#     if test "x$ax_cv_ncursesw" != xyes && test "x$ax_cv_ncurses" != xyes; then
+#         AC_MSG_ERROR([requires either NcursesW or Ncurses library])
+#     fi
+#
+#   If any Curses library will do (but one must be present and must support
+#   color), you could use:
+#
+#     AX_WITH_CURSES
+#     if test "x$ax_cv_curses" != xyes || test "x$ax_cv_curses_color" != xyes; then
+#         AC_MSG_ERROR([requires an X/Open-compatible Curses library with color])
+#     fi
+#
+#   Certain preprocessor symbols and shell variables defined by this macro
+#   can be used to determine various features of the Curses library.  In
+#   particular, HAVE_CURSES and ax_cv_curses are defined if the Curses
+#   library found conforms to the traditional SysV and/or X/Open Base Curses
+#   definition.  Any working Curses library conforms to this level.
+#
+#   HAVE_CURSES_ENHANCED and ax_cv_curses_enhanced are defined if the
+#   library supports the X/Open Enhanced Curses definition.  In particular,
+#   the wide-character types attr_t, cchar_t and wint_t, the functions
+#   wattr_set() and wget_wch() and the macros WA_NORMAL and _XOPEN_CURSES
+#   are checked.  The Ncurses library does NOT conform to this definition,
+#   although NcursesW does.
+#
+#   HAVE_CURSES_COLOR and ax_cv_curses_color are defined if the library
+#   supports color functions and macros such as COLOR_PAIR, A_COLOR,
+#   COLOR_WHITE, COLOR_RED and init_pair().  These are NOT part of the
+#   X/Open Base Curses definition, but are part of the Enhanced set of
+#   functions.  The Ncurses library DOES support these functions, as does
+#   NcursesW.
+#
+#   HAVE_CURSES_OBSOLETE and ax_cv_curses_obsolete are defined if the
+#   library supports certain features present in SysV and BSD Curses but not
+#   defined in the X/Open definition.  In particular, the functions
+#   getattrs(), getcurx() and getmaxx() are checked.
+#
+#   To use the HAVE_xxx_H preprocessor symbols, insert the following into
+#   your system.h (or equivalent) header file:
+#
+#     #if defined HAVE_NCURSESW_CURSES_H
+#     #  include <ncursesw/curses.h>
+#     #elif defined HAVE_NCURSESW_H
+#     #  include <ncursesw.h>
+#     #elif defined HAVE_NCURSES_CURSES_H
+#     #  include <ncurses/curses.h>
+#     #elif defined HAVE_NCURSES_H
+#     #  include <ncurses.h>
+#     #elif defined HAVE_CURSES_H
+#     #  include <curses.h>
+#     #else
+#     #  error "SysV or X/Open-compatible Curses header file required"
+#     #endif
+#
+#   For previous users of this macro: you should not need to change anything
+#   in your configure.ac or Makefile.am, as the previous (serial 10)
+#   semantics are still valid.  However, you should update your system.h (or
+#   equivalent) header file to the fragment shown above. You are encouraged
+#   also to make use of the extended functionality provided by this version
+#   of AX_WITH_CURSES, as well as in the additional macros
+#   AX_WITH_CURSES_PANEL, AX_WITH_CURSES_MENU and AX_WITH_CURSES_FORM.
+#
+# LICENSE
+#
+#   Copyright (c) 2009 Mark Pulford <mark@kyne.com.au>
+#   Copyright (c) 2009 Damian Pietras <daper@daper.net>
+#   Copyright (c) 2012 Reuben Thomas <rrt@sc3d.org>
+#   Copyright (c) 2011 John Zaitseff <J.Zaitseff@zap.org.au>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 18
+
+# internal function to factorize common code that is used by both ncurses
+# and ncursesw
+AC_DEFUN([_FIND_CURSES_FLAGS], [
+    AC_MSG_CHECKING([for $1 via pkg-config])
+
+    AX_REQUIRE_DEFINED([PKG_CHECK_EXISTS])
+    _PKG_CONFIG([_ax_cv_$1_libs], [libs], [$1])
+    _PKG_CONFIG([_ax_cv_$1_cppflags], [cflags], [$1])
+
+    AS_IF([test "x$pkg_failed" = "xyes" || test "x$pkg_failed" = "xuntried"],[
+        AC_MSG_RESULT([no])
+        # No suitable .pc file found, have to find flags via fallback
+        AC_CACHE_CHECK([for $1 via fallback], [ax_cv_$1], [
+            AS_ECHO()
+            pkg_cv__ax_cv_$1_libs="-l$1"
+            pkg_cv__ax_cv_$1_cppflags="-D_GNU_SOURCE $CURSES_CFLAGS"
+            LIBS="$ax_saved_LIBS $pkg_cv__ax_cv_$1_libs"
+            CPPFLAGS="$ax_saved_CPPFLAGS $pkg_cv__ax_cv_$1_cppflags"
+
+            AC_MSG_CHECKING([for initscr() with $pkg_cv__ax_cv_$1_libs])
+            AC_LINK_IFELSE([AC_LANG_CALL([], [initscr])],
+                [
+                    AC_MSG_RESULT([yes])
+                    AC_MSG_CHECKING([for nodelay() with $pkg_cv__ax_cv_$1_libs])
+                    AC_LINK_IFELSE([AC_LANG_CALL([], [nodelay])],[
+                        ax_cv_$1=yes
+                        ],[
+                        AC_MSG_RESULT([no])
+                        m4_if(
+                            [$1],[ncursesw],[pkg_cv__ax_cv_$1_libs="$pkg_cv__ax_cv_$1_libs -ltinfow"],
+                            [$1],[ncurses],[pkg_cv__ax_cv_$1_libs="$pkg_cv__ax_cv_$1_libs -ltinfo"]
+                        )
+                        LIBS="$ax_saved_LIBS $pkg_cv__ax_cv_$1_libs"
+
+                        AC_MSG_CHECKING([for nodelay() with $pkg_cv__ax_cv_$1_libs])
+                        AC_LINK_IFELSE([AC_LANG_CALL([], [nodelay])],[
+                            ax_cv_$1=yes
+                            ],[
+                            ax_cv_$1=no
+                        ])
+                    ])
+                ],[
+                    ax_cv_$1=no
+            ])
+        ])
+        ],[
+        AC_MSG_RESULT([yes])
+        # Found .pc file, using its information
+        LIBS="$ax_saved_LIBS $pkg_cv__ax_cv_$1_libs"
+        CPPFLAGS="$ax_saved_CPPFLAGS $pkg_cv__ax_cv_$1_cppflags"
+        ax_cv_$1=yes
+    ])
+])
+
+AU_ALIAS([MP_WITH_CURSES], [AX_WITH_CURSES])
+AC_DEFUN([AX_WITH_CURSES], [
+    AC_ARG_VAR([CURSES_LIBS], [linker library for Curses, e.g. -lcurses])
+    AC_ARG_VAR([CURSES_CFLAGS], [preprocessor flags for Curses, e.g. -I/usr/include/ncursesw])
+    AC_ARG_WITH([ncurses], [AS_HELP_STRING([--with-ncurses],
+        [force the use of Ncurses or NcursesW])],
+        [], [with_ncurses=check])
+    AC_ARG_WITH([ncursesw], [AS_HELP_STRING([--without-ncursesw],
+        [do not use NcursesW (wide character support)])],
+        [], [with_ncursesw=check])
+
+    ax_saved_LIBS=$LIBS
+    ax_saved_CPPFLAGS=$CPPFLAGS
+
+    AS_IF([test "x$with_ncurses" = xyes || test "x$with_ncursesw" = xyes],
+        [ax_with_plaincurses=no], [ax_with_plaincurses=check])
+
+    ax_cv_curses_which=no
+
+    # Test for NcursesW
+    AS_IF([test "x$CURSES_LIBS" = x && test "x$with_ncursesw" != xno], [
+        _FIND_CURSES_FLAGS([ncursesw])
+
+        AS_IF([test "x$ax_cv_ncursesw" = xno && test "x$with_ncursesw" = xyes], [
+            AC_MSG_ERROR([--with-ncursesw specified but could not find NcursesW library])
+        ])
+
+        AS_IF([test "x$ax_cv_ncursesw" = xyes], [
+            ax_cv_curses=yes
+            ax_cv_curses_which=ncursesw
+            CURSES_LIBS="$pkg_cv__ax_cv_ncursesw_libs"
+            CURSES_CFLAGS="$pkg_cv__ax_cv_ncursesw_cppflags"
+            AC_DEFINE([HAVE_NCURSESW], [1], [Define to 1 if the NcursesW library is present])
+            AC_DEFINE([HAVE_CURSES],   [1], [Define to 1 if a SysV or X/Open compatible Curses library is present])
+
+            AC_CACHE_CHECK([for working ncursesw/curses.h], [ax_cv_header_ncursesw_curses_h], [
+                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+                        @%:@define _XOPEN_SOURCE_EXTENDED 1
+                        @%:@include <ncursesw/curses.h>
+                    ]], [[
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        attr_t d = WA_NORMAL;
+                        cchar_t e;
+                        wint_t f;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+                        wattr_set(stdscr, d, 0, NULL);
+                        wget_wch(stdscr, &f);
+                    ]])],
+                    [ax_cv_header_ncursesw_curses_h=yes],
+                    [ax_cv_header_ncursesw_curses_h=no])
+            ])
+            AS_IF([test "x$ax_cv_header_ncursesw_curses_h" = xyes], [
+                ax_cv_curses_enhanced=yes
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+                AC_DEFINE([HAVE_CURSES_ENHANCED],   [1], [Define to 1 if library supports X/Open Enhanced functions])
+                AC_DEFINE([HAVE_CURSES_COLOR],      [1], [Define to 1 if library supports color (enhanced functions)])
+                AC_DEFINE([HAVE_CURSES_OBSOLETE],   [1], [Define to 1 if library supports certain obsolete features])
+                AC_DEFINE([HAVE_NCURSESW_CURSES_H], [1], [Define to 1 if <ncursesw/curses.h> is present])
+            ])
+
+            AC_CACHE_CHECK([for working ncursesw.h], [ax_cv_header_ncursesw_h], [
+                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+                        @%:@define _XOPEN_SOURCE_EXTENDED 1
+                        @%:@include <ncursesw.h>
+                    ]], [[
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        attr_t d = WA_NORMAL;
+                        cchar_t e;
+                        wint_t f;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+                        wattr_set(stdscr, d, 0, NULL);
+                        wget_wch(stdscr, &f);
+                    ]])],
+                    [ax_cv_header_ncursesw_h=yes],
+                    [ax_cv_header_ncursesw_h=no])
+            ])
+            AS_IF([test "x$ax_cv_header_ncursesw_h" = xyes], [
+                ax_cv_curses_enhanced=yes
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+                AC_DEFINE([HAVE_CURSES_ENHANCED], [1], [Define to 1 if library supports X/Open Enhanced functions])
+                AC_DEFINE([HAVE_CURSES_COLOR],    [1], [Define to 1 if library supports color (enhanced functions)])
+                AC_DEFINE([HAVE_CURSES_OBSOLETE], [1], [Define to 1 if library supports certain obsolete features])
+                AC_DEFINE([HAVE_NCURSESW_H],      [1], [Define to 1 if <ncursesw.h> is present])
+            ])
+
+            AC_CACHE_CHECK([for working ncurses.h], [ax_cv_header_ncurses_h_with_ncursesw], [
+                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+                        @%:@define _XOPEN_SOURCE_EXTENDED 1
+                        @%:@include <ncurses.h>
+                    ]], [[
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        attr_t d = WA_NORMAL;
+                        cchar_t e;
+                        wint_t f;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+                        wattr_set(stdscr, d, 0, NULL);
+                        wget_wch(stdscr, &f);
+                    ]])],
+                    [ax_cv_header_ncurses_h_with_ncursesw=yes],
+                    [ax_cv_header_ncurses_h_with_ncursesw=no])
+            ])
+            AS_IF([test "x$ax_cv_header_ncurses_h_with_ncursesw" = xyes], [
+                ax_cv_curses_enhanced=yes
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+                AC_DEFINE([HAVE_CURSES_ENHANCED], [1], [Define to 1 if library supports X/Open Enhanced functions])
+                AC_DEFINE([HAVE_CURSES_COLOR],    [1], [Define to 1 if library supports color (enhanced functions)])
+                AC_DEFINE([HAVE_CURSES_OBSOLETE], [1], [Define to 1 if library supports certain obsolete features])
+                AC_DEFINE([HAVE_NCURSES_H],       [1], [Define to 1 if <ncurses.h> is present])
+            ])
+
+            AS_IF([test "x$ax_cv_header_ncursesw_curses_h" = xno && test "x$ax_cv_header_ncursesw_h" = xno && test "x$ax_cv_header_ncurses_h_with_ncursesw" = xno], [
+                AC_MSG_WARN([could not find a working ncursesw/curses.h, ncursesw.h or ncurses.h])
+            ])
+        ])
+    ])
+    unset pkg_cv__ax_cv_ncursesw_libs
+    unset pkg_cv__ax_cv_ncursesw_cppflags
+
+    # Test for Ncurses
+    AS_IF([test "x$CURSES_LIBS" = x && test "x$with_ncurses" != xno && test "x$ax_cv_curses_which" = xno], [
+        _FIND_CURSES_FLAGS([ncurses])
+
+        AS_IF([test "x$ax_cv_ncurses" = xno && test "x$with_ncurses" = xyes], [
+            AC_MSG_ERROR([--with-ncurses specified but could not find Ncurses library])
+        ])
+
+        AS_IF([test "x$ax_cv_ncurses" = xyes], [
+            ax_cv_curses=yes
+            ax_cv_curses_which=ncurses
+            CURSES_LIBS="$pkg_cv__ax_cv_ncurses_libs"
+            CURSES_CFLAGS="$pkg_cv__ax_cv_ncurses_cppflags"
+            AC_DEFINE([HAVE_NCURSES], [1], [Define to 1 if the Ncurses library is present])
+            AC_DEFINE([HAVE_CURSES],  [1], [Define to 1 if a SysV or X/Open compatible Curses library is present])
+
+            AC_CACHE_CHECK([for working ncurses/curses.h], [ax_cv_header_ncurses_curses_h], [
+                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+                        @%:@include <ncurses/curses.h>
+                    ]], [[
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+                    ]])],
+                    [ax_cv_header_ncurses_curses_h=yes],
+                    [ax_cv_header_ncurses_curses_h=no])
+            ])
+            AS_IF([test "x$ax_cv_header_ncurses_curses_h" = xyes], [
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+                AC_DEFINE([HAVE_CURSES_COLOR],     [1], [Define to 1 if library supports color (enhanced functions)])
+                AC_DEFINE([HAVE_CURSES_OBSOLETE],  [1], [Define to 1 if library supports certain obsolete features])
+                AC_DEFINE([HAVE_NCURSES_CURSES_H], [1], [Define to 1 if <ncurses/curses.h> is present])
+            ])
+
+            AC_CACHE_CHECK([for working ncurses.h], [ax_cv_header_ncurses_h], [
+                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+                        @%:@include <ncurses.h>
+                    ]], [[
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+                    ]])],
+                    [ax_cv_header_ncurses_h=yes],
+                    [ax_cv_header_ncurses_h=no])
+            ])
+            AS_IF([test "x$ax_cv_header_ncurses_h" = xyes], [
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+                AC_DEFINE([HAVE_CURSES_COLOR],    [1], [Define to 1 if library supports color (enhanced functions)])
+                AC_DEFINE([HAVE_CURSES_OBSOLETE], [1], [Define to 1 if library supports certain obsolete features])
+                AC_DEFINE([HAVE_NCURSES_H],       [1], [Define to 1 if <ncurses.h> is present])
+            ])
+
+            AS_IF([test "x$ax_cv_header_ncurses_curses_h" = xno && test "x$ax_cv_header_ncurses_h" = xno], [
+                AC_MSG_WARN([could not find a working ncurses/curses.h or ncurses.h])
+            ])
+        ])
+    ])
+    unset pkg_cv__ax_cv_ncurses_libs
+    unset pkg_cv__ax_cv_ncurses_cppflags
+
+    # Test for plain Curses (or if CURSES_LIBS was set by user)
+    AS_IF([test "x$with_plaincurses" != xno && test "x$ax_cv_curses_which" = xno], [
+        AS_IF([test "x$CURSES_LIBS" != x], [
+            LIBS="$ax_saved_LIBS $CURSES_LIBS"
+        ], [
+            LIBS="$ax_saved_LIBS -lcurses"
+        ])
+
+        AC_CACHE_CHECK([for Curses library], [ax_cv_plaincurses], [
+            AC_LINK_IFELSE([AC_LANG_CALL([], [initscr])],
+                [ax_cv_plaincurses=yes], [ax_cv_plaincurses=no])
+        ])
+
+        AS_IF([test "x$ax_cv_plaincurses" = xyes], [
+            ax_cv_curses=yes
+            ax_cv_curses_which=plaincurses
+            AS_IF([test "x$CURSES_LIBS" = x], [
+                CURSES_LIBS="-lcurses"
+            ])
+            AC_DEFINE([HAVE_CURSES], [1], [Define to 1 if a SysV or X/Open compatible Curses library is present])
+
+            # Check for base conformance (and header file)
+
+            AC_CACHE_CHECK([for working curses.h], [ax_cv_header_curses_h], [
+                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+                        @%:@include <curses.h>
+                    ]], [[
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        initscr();
+                    ]])],
+                    [ax_cv_header_curses_h=yes],
+                    [ax_cv_header_curses_h=no])
+            ])
+            AS_IF([test "x$ax_cv_header_curses_h" = xyes], [
+                AC_DEFINE([HAVE_CURSES_H], [1], [Define to 1 if <curses.h> is present])
+
+                # Check for X/Open Enhanced conformance
+
+                AC_CACHE_CHECK([for X/Open Enhanced Curses conformance], [ax_cv_plaincurses_enhanced], [
+                    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+                            @%:@define _XOPEN_SOURCE_EXTENDED 1
+                            @%:@include <curses.h>
+                            @%:@ifndef _XOPEN_CURSES
+                            @%:@error "this Curses library is not enhanced"
+                            "this Curses library is not enhanced"
+                            @%:@endif
+                        ]], [[
+                            chtype a = A_BOLD;
+                            int b = KEY_LEFT;
+                            chtype c = COLOR_PAIR(1) & A_COLOR;
+                            attr_t d = WA_NORMAL;
+                            cchar_t e;
+                            wint_t f;
+                            initscr();
+                            init_pair(1, COLOR_WHITE, COLOR_RED);
+                            wattr_set(stdscr, d, 0, NULL);
+                            wget_wch(stdscr, &f);
+                        ]])],
+                        [ax_cv_plaincurses_enhanced=yes],
+                        [ax_cv_plaincurses_enhanced=no])
+                ])
+                AS_IF([test "x$ax_cv_plaincurses_enhanced" = xyes], [
+                    ax_cv_curses_enhanced=yes
+                    ax_cv_curses_color=yes
+                    AC_DEFINE([HAVE_CURSES_ENHANCED], [1], [Define to 1 if library supports X/Open Enhanced functions])
+                    AC_DEFINE([HAVE_CURSES_COLOR],    [1], [Define to 1 if library supports color (enhanced functions)])
+                ])
+
+                # Check for color functions
+
+                AC_CACHE_CHECK([for Curses color functions], [ax_cv_plaincurses_color], [
+                    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+                        @%:@define _XOPEN_SOURCE_EXTENDED 1
+                        @%:@include <curses.h>
+                        ]], [[
+                            chtype a = A_BOLD;
+                            int b = KEY_LEFT;
+                            chtype c = COLOR_PAIR(1) & A_COLOR;
+                            initscr();
+                            init_pair(1, COLOR_WHITE, COLOR_RED);
+                        ]])],
+                        [ax_cv_plaincurses_color=yes],
+                        [ax_cv_plaincurses_color=no])
+                ])
+                AS_IF([test "x$ax_cv_plaincurses_color" = xyes], [
+                    ax_cv_curses_color=yes
+                    AC_DEFINE([HAVE_CURSES_COLOR], [1], [Define to 1 if library supports color (enhanced functions)])
+                ])
+
+                # Check for obsolete functions
+
+                AC_CACHE_CHECK([for obsolete Curses functions], [ax_cv_plaincurses_obsolete], [
+                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+                        @%:@include <curses.h>
+                    ]], [[
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                    ]])],
+                    [ax_cv_plaincurses_obsolete=yes],
+                    [ax_cv_plaincurses_obsolete=no])
+                ])
+                AS_IF([test "x$ax_cv_plaincurses_obsolete" = xyes], [
+                    ax_cv_curses_obsolete=yes
+                    AC_DEFINE([HAVE_CURSES_OBSOLETE], [1], [Define to 1 if library supports certain obsolete features])
+                ])
+            ])
+
+            AS_IF([test "x$ax_cv_header_curses_h" = xno], [
+                AC_MSG_WARN([could not find a working curses.h])
+            ])
+        ])
+    ])
+
+    AS_IF([test "x$ax_cv_curses"          != xyes], [ax_cv_curses=no])
+    AS_IF([test "x$ax_cv_curses_enhanced" != xyes], [ax_cv_curses_enhanced=no])
+    AS_IF([test "x$ax_cv_curses_color"    != xyes], [ax_cv_curses_color=no])
+    AS_IF([test "x$ax_cv_curses_obsolete" != xyes], [ax_cv_curses_obsolete=no])
+
+    LIBS=$ax_saved_LIBS
+    CPPFLAGS=$ax_saved_CPPFLAGS
+
+    unset ax_saved_LIBS
+    unset ax_saved_CPPFLAGS
+])dnl
+
+# pkg.m4 - Macros to locate and utilise pkg-config.   -*- Autoconf -*-
+# serial 12 (pkg-config-0.29.2)
+
+dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
+dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com>
+dnl
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 2 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful, but
+dnl WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+dnl General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write to the Free Software
+dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+dnl 02111-1307, USA.
+dnl
+dnl As a special exception to the GNU General Public License, if you
+dnl distribute this file as part of a program that contains a
+dnl configuration script generated by Autoconf, you may include it under
+dnl the same distribution terms that you use for the rest of that
+dnl program.
+
+dnl PKG_PREREQ(MIN-VERSION)
+dnl -----------------------
+dnl Since: 0.29
+dnl
+dnl Verify that the version of the pkg-config macros are at least
+dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's
+dnl installed version of pkg-config, this checks the developer's version
+dnl of pkg.m4 when generating configure.
+dnl
+dnl To ensure that this macro is defined, also add:
+dnl m4_ifndef([PKG_PREREQ],
+dnl     [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])])
+dnl
+dnl See the "Since" comment for each macro you use to see what version
+dnl of the macros you require.
+m4_defun([PKG_PREREQ],
+[m4_define([PKG_MACROS_VERSION], [0.29.2])
+m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
+    [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
+])dnl PKG_PREREQ
+
+dnl PKG_PROG_PKG_CONFIG([MIN-VERSION])
+dnl ----------------------------------
+dnl Since: 0.16
+dnl
+dnl Search for the pkg-config tool and set the PKG_CONFIG variable to
+dnl first found in the path. Checks that the version of pkg-config found
+dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.9.0 is
+dnl used since that's the first version where most current features of
+dnl pkg-config existed.
+AC_DEFUN([PKG_PROG_PKG_CONFIG],
+[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
+m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
+m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
+AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
+AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
+AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
+
+if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
+	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
+fi
+if test -n "$PKG_CONFIG"; then
+	_pkg_min_version=m4_default([$1], [0.9.0])
+	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
+	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
+		AC_MSG_RESULT([yes])
+	else
+		AC_MSG_RESULT([no])
+		PKG_CONFIG=""
+	fi
+fi[]dnl
+])dnl PKG_PROG_PKG_CONFIG
+
+dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+dnl -------------------------------------------------------------------
+dnl Since: 0.18
+dnl
+dnl Check to see whether a particular set of modules exists. Similar to
+dnl PKG_CHECK_MODULES(), but does not set variables or print errors.
+dnl
+dnl Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+dnl only at the first occurence in configure.ac, so if the first place
+dnl it's called might be skipped (such as if it is within an "if", you
+dnl have to call PKG_CHECK_EXISTS manually
+AC_DEFUN([PKG_CHECK_EXISTS],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+if test -n "$PKG_CONFIG" && \
+    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
+  m4_default([$2], [:])
+m4_ifvaln([$3], [else
+  $3])dnl
+fi])
+
+dnl _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
+dnl ---------------------------------------------
+dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting
+dnl pkg_failed based on the result.
+m4_define([_PKG_CONFIG],
+[if test -n "$$1"; then
+    pkg_cv_[]$1="$$1"
+ elif test -n "$PKG_CONFIG"; then
+    PKG_CHECK_EXISTS([$3],
+                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes ],
+		     [pkg_failed=yes])
+ else
+    pkg_failed=untried
+fi[]dnl
+])dnl _PKG_CONFIG
+
+dnl _PKG_SHORT_ERRORS_SUPPORTED
+dnl ---------------------------
+dnl Internal check to see if pkg-config supports short errors.
+AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi[]dnl
+])dnl _PKG_SHORT_ERRORS_SUPPORTED
+
+
+dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
+dnl   [ACTION-IF-NOT-FOUND])
+dnl --------------------------------------------------------------
+dnl Since: 0.4.0
+dnl
+dnl Note that if there is a possibility the first call to
+dnl PKG_CHECK_MODULES might not happen, you should be sure to include an
+dnl explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
+AC_DEFUN([PKG_CHECK_MODULES],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
+AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
+
+pkg_failed=no
+AC_MSG_CHECKING([for $2])
+
+_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
+_PKG_CONFIG([$1][_LIBS], [libs], [$2])
+
+m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
+and $1[]_LIBS to avoid the need to call pkg-config.
+See the pkg-config man page for more details.])
+
+if test $pkg_failed = yes; then
+        AC_MSG_RESULT([no])
+        _PKG_SHORT_ERRORS_SUPPORTED
+        if test $_pkg_short_errors_supported = yes; then
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
+        else
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
+
+	m4_default([$4], [AC_MSG_ERROR(
+[Package requirements ($2) were not met:
+
+$$1_PKG_ERRORS
+
+Consider adjusting the PKG_CONFIG_PATH environment variable if you
+installed software in a non-standard prefix.
+
+_PKG_TEXT])[]dnl
+        ])
+elif test $pkg_failed = untried; then
+        AC_MSG_RESULT([no])
+	m4_default([$4], [AC_MSG_FAILURE(
+[The pkg-config script could not be found or is too old.  Make sure it
+is in your PATH or set the PKG_CONFIG environment variable to the full
+path to pkg-config.
+
+_PKG_TEXT
+
+To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
+        ])
+else
+	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
+	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
+        AC_MSG_RESULT([yes])
+	$3
+fi[]dnl
+])dnl PKG_CHECK_MODULES
+
+
+dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
+dnl   [ACTION-IF-NOT-FOUND])
+dnl ---------------------------------------------------------------------
+dnl Since: 0.29
+dnl
+dnl Checks for existence of MODULES and gathers its build flags with
+dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags
+dnl and VARIABLE-PREFIX_LIBS from --libs.
+dnl
+dnl Note that if there is a possibility the first call to
+dnl PKG_CHECK_MODULES_STATIC might not happen, you should be sure to
+dnl include an explicit call to PKG_PROG_PKG_CONFIG in your
+dnl configure.ac.
+AC_DEFUN([PKG_CHECK_MODULES_STATIC],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+_save_PKG_CONFIG=$PKG_CONFIG
+PKG_CONFIG="$PKG_CONFIG --static"
+PKG_CHECK_MODULES($@)
+PKG_CONFIG=$_save_PKG_CONFIG[]dnl
+])dnl PKG_CHECK_MODULES_STATIC
+
+
+dnl PKG_INSTALLDIR([DIRECTORY])
+dnl -------------------------
+dnl Since: 0.27
+dnl
+dnl Substitutes the variable pkgconfigdir as the location where a module
+dnl should install pkg-config .pc files. By default the directory is
+dnl $libdir/pkgconfig, but the default can be changed by passing
+dnl DIRECTORY. The user can override through the --with-pkgconfigdir
+dnl parameter.
+AC_DEFUN([PKG_INSTALLDIR],
+[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
+m4_pushdef([pkg_description],
+    [pkg-config installation directory @<:@]pkg_default[@:>@])
+AC_ARG_WITH([pkgconfigdir],
+    [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
+    [with_pkgconfigdir=]pkg_default)
+AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
+m4_popdef([pkg_default])
+m4_popdef([pkg_description])
+])dnl PKG_INSTALLDIR
+
+
+dnl PKG_NOARCH_INSTALLDIR([DIRECTORY])
+dnl --------------------------------
+dnl Since: 0.27
+dnl
+dnl Substitutes the variable noarch_pkgconfigdir as the location where a
+dnl module should install arch-independent pkg-config .pc files. By
+dnl default the directory is $datadir/pkgconfig, but the default can be
+dnl changed by passing DIRECTORY. The user can override through the
+dnl --with-noarch-pkgconfigdir parameter.
+AC_DEFUN([PKG_NOARCH_INSTALLDIR],
+[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
+m4_pushdef([pkg_description],
+    [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
+AC_ARG_WITH([noarch-pkgconfigdir],
+    [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
+    [with_noarch_pkgconfigdir=]pkg_default)
+AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
+m4_popdef([pkg_default])
+m4_popdef([pkg_description])
+])dnl PKG_NOARCH_INSTALLDIR
+
+
+dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
+dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+dnl -------------------------------------------
+dnl Since: 0.28
+dnl
+dnl Retrieves the value of the pkg-config variable for the given module.
+AC_DEFUN([PKG_CHECK_VAR],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
+
+_PKG_CONFIG([$1], [variable="][$3]["], [$2])
+AS_VAR_COPY([$1], [pkg_cv_][$1])
+
+AS_VAR_IF([$1], [""], [$5], [$4])dnl
+])dnl PKG_CHECK_VAR
+
 # Copyright (C) 2002-2020 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
diff --git a/configure b/configure
index 2d286d7..1f8929e 100755
--- a/configure
+++ b/configure
@@ -195,8 +195,7 @@ test -x / || exit 1"
   as_suggested="  as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
   as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
   eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" &&
-  test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1
-test \$(( 1 + 1 )) = 2 || exit 1"
+  test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1"
   if (eval "$as_required") 2>/dev/null; then :
   as_have_required=yes
 else
@@ -582,49 +581,15 @@ PACKAGE_STRING='simple-snake 0.1'
 PACKAGE_BUGREPORT=''
 PACKAGE_URL=''
 
-# Factoring default headers for most tests.
-ac_includes_default="\
-#include <stdio.h>
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-# include <sys/stat.h>
-#endif
-#ifdef STDC_HEADERS
-# include <stdlib.h>
-# include <stddef.h>
-#else
-# ifdef HAVE_STDLIB_H
-#  include <stdlib.h>
-# endif
-#endif
-#ifdef HAVE_STRING_H
-# if !defined STDC_HEADERS && defined HAVE_MEMORY_H
-#  include <memory.h>
-# endif
-# include <string.h>
-#endif
-#ifdef HAVE_STRINGS_H
-# include <strings.h>
-#endif
-#ifdef HAVE_INTTYPES_H
-# include <inttypes.h>
-#endif
-#ifdef HAVE_STDINT_H
-# include <stdint.h>
-#endif
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif"
-
 ac_subst_vars='am__EXEEXT_FALSE
 am__EXEEXT_TRUE
 LTLIBOBJS
 LIBOBJS
-EGREP
-GREP
-CPP
+PKG_CONFIG_LIBDIR
+PKG_CONFIG_PATH
+PKG_CONFIG
+CURSES_CFLAGS
+CURSES_LIBS
 am__fastdepCC_FALSE
 am__fastdepCC_TRUE
 CCDEPMODE
@@ -713,6 +678,8 @@ ac_user_opts='
 enable_option_checking
 enable_silent_rules
 enable_dependency_tracking
+with_ncurses
+with_ncursesw
 '
       ac_precious_vars='build_alias
 host_alias
@@ -722,7 +689,11 @@ CFLAGS
 LDFLAGS
 LIBS
 CPPFLAGS
-CPP'
+CURSES_LIBS
+CURSES_CFLAGS
+PKG_CONFIG
+PKG_CONFIG_PATH
+PKG_CONFIG_LIBDIR'
 
 
 # Initialize some variables set by options.
@@ -1355,6 +1326,12 @@ Optional Features:
   --disable-dependency-tracking
                           speeds up one-time build
 
+Optional Packages:
+  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
+  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --with-ncurses          force the use of Ncurses or NcursesW
+  --without-ncursesw      do not use NcursesW (wide character support)
+
 Some influential environment variables:
   CC          C compiler command
   CFLAGS      C compiler flags
@@ -1363,7 +1340,14 @@ Some influential environment variables:
   LIBS        libraries to pass to the linker, e.g. -l<library>
   CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
               you have headers in a nonstandard directory <include dir>
-  CPP         C preprocessor
+  CURSES_LIBS linker library for Curses, e.g. -lcurses
+  CURSES_CFLAGS
+              preprocessor flags for Curses, e.g. -I/usr/include/ncursesw
+  PKG_CONFIG  path to pkg-config utility
+  PKG_CONFIG_PATH
+              directories to add to pkg-config's search path
+  PKG_CONFIG_LIBDIR
+              path overriding pkg-config's built-in search path
 
 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
@@ -1483,20 +1467,21 @@ fi
 
 } # ac_fn_c_try_compile
 
-# ac_fn_c_try_cpp LINENO
-# ----------------------
-# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
-ac_fn_c_try_cpp ()
+# ac_fn_c_try_link LINENO
+# -----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_link ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if { { ac_try="$ac_cpp conftest.$ac_ext"
+  rm -f conftest.$ac_objext conftest$ac_exeext
+  if { { ac_try="$ac_link"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
 $as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+  (eval "$ac_link") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
     grep -v '^ *+' conftest.err >conftest.er1
@@ -1504,181 +1489,29 @@ $as_echo "$ac_try_echo"; } >&5
     mv -f conftest.er1 conftest.err
   fi
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } > conftest.i && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
 	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 test -x conftest$ac_exeext
        }; then :
   ac_retval=0
 else
   $as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-    ac_retval=1
-fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_c_try_cpp
-
-# ac_fn_c_check_header_mongrel LINENO HEADER VAR INCLUDES
-# -------------------------------------------------------
-# Tests whether HEADER exists, giving a warning if it cannot be compiled using
-# the include files in INCLUDES and setting the cache variable VAR
-# accordingly.
-ac_fn_c_check_header_mongrel ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if eval \${$3+:} false; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
-$as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-fi
-eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-else
-  # Is the header compilable?
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 usability" >&5
-$as_echo_n "checking $2 usability... " >&6; }
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$4
-#include <$2>
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_header_compiler=yes
-else
-  ac_header_compiler=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_compiler" >&5
-$as_echo "$ac_header_compiler" >&6; }
-
-# Is the header present?
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 presence" >&5
-$as_echo_n "checking $2 presence... " >&6; }
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <$2>
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-  ac_header_preproc=yes
-else
-  ac_header_preproc=no
-fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_preproc" >&5
-$as_echo "$ac_header_preproc" >&6; }
-
-# So?  What about this header?
-case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in #((
-  yes:no: )
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&5
-$as_echo "$as_me: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
-$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
-    ;;
-  no:yes:* )
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: present but cannot be compiled" >&5
-$as_echo "$as_me: WARNING: $2: present but cannot be compiled" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     check for missing prerequisite headers?" >&5
-$as_echo "$as_me: WARNING: $2:     check for missing prerequisite headers?" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: see the Autoconf documentation" >&5
-$as_echo "$as_me: WARNING: $2: see the Autoconf documentation" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&5
-$as_echo "$as_me: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
-$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
-    ;;
-esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
-$as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  eval "$3=\$ac_header_compiler"
-fi
-eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-
-} # ac_fn_c_check_header_mongrel
-
-# ac_fn_c_try_run LINENO
-# ----------------------
-# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
-# that executables *can* be run.
-ac_fn_c_try_run ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if { { ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_link") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
-  { { case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: program exited with status $ac_status" >&5
-       $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-       ac_retval=$ac_status
+	ac_retval=1
 fi
+  # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
+  # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
+  # interfere with the next link command; also delete a directory that is
+  # left behind by Apple's compiler.  We do this before executing the actions.
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
-} # ac_fn_c_try_run
-
-# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
-# -------------------------------------------------------
-# Tests whether HEADER exists and can be compiled using the include files in
-# INCLUDES, setting the cache variable VAR accordingly.
-ac_fn_c_check_header_compile ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
-$as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$4
-#include <$2>
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  eval "$3=yes"
-else
-  eval "$3=no"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-
-} # ac_fn_c_check_header_compile
+} # ac_fn_c_try_link
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
@@ -3676,417 +3509,1169 @@ fi
 ac_config_files="$ac_config_files Makefile src/Makefile"
 
 
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
-$as_echo_n "checking how to run the C preprocessor... " >&6; }
-# On Suns, sometimes $CPP names a directory.
-if test -n "$CPP" && test -d "$CPP"; then
-  CPP=
-fi
-if test -z "$CPP"; then
-  if ${ac_cv_prog_CPP+:} false; then :
+
+
+
+
+
+
+if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
+	if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}pkg-config", so it can be a program name with args.
+set dummy ${ac_tool_prefix}pkg-config; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_PKG_CONFIG+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-      # Double quotes because CPP needs to be expanded
-    for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
-    do
-      ac_preproc_ok=false
-for ac_c_preproc_warn_flag in '' yes
+  case $PKG_CONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_PKG_CONFIG="$PKG_CONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
 do
-  # Use a header file that comes with gcc, so configuring glibc
-  # with a fresh cross-compiler works.
-  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-  # <limits.h> exists even on freestanding compilers.
-  # On the NeXT, cc -E runs the code through the compiler's parser,
-  # not just through cpp. "Syntax error" is here to catch this case.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-		     Syntax error
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
 
+  ;;
+esac
+fi
+PKG_CONFIG=$ac_cv_path_PKG_CONFIG
+if test -n "$PKG_CONFIG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
+$as_echo "$PKG_CONFIG" >&6; }
 else
-  # Broken: fails on valid input.
-continue
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
 fi
-rm -f conftest.err conftest.i conftest.$ac_ext
 
-  # OK, works on sane cases.  Now check whether nonexistent headers
-  # can be detected and how.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <ac_nonexistent.h>
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-  # Broken: success on invalid input.
-continue
+
+fi
+if test -z "$ac_cv_path_PKG_CONFIG"; then
+  ac_pt_PKG_CONFIG=$PKG_CONFIG
+  # Extract the first word of "pkg-config", so it can be a program name with args.
+set dummy pkg-config; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_ac_pt_PKG_CONFIG+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ac_pt_PKG_CONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ac_pt_PKG_CONFIG="$ac_pt_PKG_CONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_ac_pt_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+ac_pt_PKG_CONFIG=$ac_cv_path_ac_pt_PKG_CONFIG
+if test -n "$ac_pt_PKG_CONFIG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_PKG_CONFIG" >&5
+$as_echo "$ac_pt_PKG_CONFIG" >&6; }
 else
-  # Passes both tests.
-ac_preproc_ok=:
-break
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
 fi
-rm -f conftest.err conftest.i conftest.$ac_ext
 
-done
-# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.i conftest.err conftest.$ac_ext
-if $ac_preproc_ok; then :
-  break
+  if test "x$ac_pt_PKG_CONFIG" = x; then
+    PKG_CONFIG=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    PKG_CONFIG=$ac_pt_PKG_CONFIG
+  fi
+else
+  PKG_CONFIG="$ac_cv_path_PKG_CONFIG"
 fi
 
-    done
-    ac_cv_prog_CPP=$CPP
+fi
+if test -n "$PKG_CONFIG"; then
+	_pkg_min_version=0.9.0
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking pkg-config is at least version $_pkg_min_version" >&5
+$as_echo_n "checking pkg-config is at least version $_pkg_min_version... " >&6; }
+	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+	else
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+		PKG_CONFIG=""
+	fi
+fi
 
+
+
+
+
+# Check whether --with-ncurses was given.
+if test "${with_ncurses+set}" = set; then :
+  withval=$with_ncurses;
+else
+  with_ncurses=check
 fi
-  CPP=$ac_cv_prog_CPP
+
+
+# Check whether --with-ncursesw was given.
+if test "${with_ncursesw+set}" = set; then :
+  withval=$with_ncursesw;
 else
-  ac_cv_prog_CPP=$CPP
+  with_ncursesw=check
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
-$as_echo "$CPP" >&6; }
-ac_preproc_ok=false
-for ac_c_preproc_warn_flag in '' yes
-do
-  # Use a header file that comes with gcc, so configuring glibc
-  # with a fresh cross-compiler works.
-  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-  # <limits.h> exists even on freestanding compilers.
-  # On the NeXT, cc -E runs the code through the compiler's parser,
-  # not just through cpp. "Syntax error" is here to catch this case.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+
+
+    ax_saved_LIBS=$LIBS
+    ax_saved_CPPFLAGS=$CPPFLAGS
+
+    if test "x$with_ncurses" = xyes || test "x$with_ncursesw" = xyes; then :
+  ax_with_plaincurses=no
+else
+  ax_with_plaincurses=check
+fi
+
+    ax_cv_curses_which=no
+
+    # Test for NcursesW
+    if test "x$CURSES_LIBS" = x && test "x$with_ncursesw" != xno; then :
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ncursesw via pkg-config" >&5
+$as_echo_n "checking for ncursesw via pkg-config... " >&6; }
+
+
+
+    if test -n "$_ax_cv_ncursesw_libs"; then
+    pkg_cv__ax_cv_ncursesw_libs="$_ax_cv_ncursesw_libs"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"ncursesw\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "ncursesw") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv__ax_cv_ncursesw_libs=`$PKG_CONFIG --libs "ncursesw" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+    if test -n "$_ax_cv_ncursesw_cppflags"; then
+    pkg_cv__ax_cv_ncursesw_cppflags="$_ax_cv_ncursesw_cppflags"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"ncursesw\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "ncursesw") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv__ax_cv_ncursesw_cppflags=`$PKG_CONFIG --cflags "ncursesw" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+
+    if test "x$pkg_failed" = "xyes" || test "x$pkg_failed" = "xuntried"; then :
+
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+        # No suitable .pc file found, have to find flags via fallback
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ncursesw via fallback" >&5
+$as_echo_n "checking for ncursesw via fallback... " >&6; }
+if ${ax_cv_ncursesw+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+            $as_echo
+            pkg_cv__ax_cv_ncursesw_libs="-lncursesw"
+            pkg_cv__ax_cv_ncursesw_cppflags="-D_GNU_SOURCE $CURSES_CFLAGS"
+            LIBS="$ax_saved_LIBS $pkg_cv__ax_cv_ncursesw_libs"
+            CPPFLAGS="$ax_saved_CPPFLAGS $pkg_cv__ax_cv_ncursesw_cppflags"
+
+            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for initscr() with $pkg_cv__ax_cv_ncursesw_libs" >&5
+$as_echo_n "checking for initscr() with $pkg_cv__ax_cv_ncursesw_libs... " >&6; }
+            cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char initscr ();
+int
+main ()
+{
+return initscr ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+                    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+                    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for nodelay() with $pkg_cv__ax_cv_ncursesw_libs" >&5
+$as_echo_n "checking for nodelay() with $pkg_cv__ax_cv_ncursesw_libs... " >&6; }
+                    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
 #endif
-		     Syntax error
+char nodelay ();
+int
+main ()
+{
+return nodelay ();
+  ;
+  return 0;
+}
 _ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"; then :
+
+                        ax_cv_ncursesw=yes
 
 else
-  # Broken: fails on valid input.
-continue
-fi
-rm -f conftest.err conftest.i conftest.$ac_ext
 
-  # OK, works on sane cases.  Now check whether nonexistent headers
-  # can be detected and how.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+                        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+                        pkg_cv__ax_cv_ncursesw_libs="$pkg_cv__ax_cv_ncursesw_libs -ltinfow"
+                        LIBS="$ax_saved_LIBS $pkg_cv__ax_cv_ncursesw_libs"
+
+                        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for nodelay() with $pkg_cv__ax_cv_ncursesw_libs" >&5
+$as_echo_n "checking for nodelay() with $pkg_cv__ax_cv_ncursesw_libs... " >&6; }
+                        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <ac_nonexistent.h>
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char nodelay ();
+int
+main ()
+{
+return nodelay ();
+  ;
+  return 0;
+}
 _ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-  # Broken: success on invalid input.
-continue
+if ac_fn_c_try_link "$LINENO"; then :
+
+                            ax_cv_ncursesw=yes
+
 else
-  # Passes both tests.
-ac_preproc_ok=:
-break
+
+                            ax_cv_ncursesw=no
+
 fi
-rm -f conftest.err conftest.i conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
-done
-# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.i conftest.err conftest.$ac_ext
-if $ac_preproc_ok; then :
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
 else
-  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
-See \`config.log' for more details" "$LINENO" 5; }
+
+                    ax_cv_ncursesw=no
+
 fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_ncursesw" >&5
+$as_echo "$ax_cv_ncursesw" >&6; }
+
+else
+
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+        # Found .pc file, using its information
+        LIBS="$ax_saved_LIBS $pkg_cv__ax_cv_ncursesw_libs"
+        CPPFLAGS="$ax_saved_CPPFLAGS $pkg_cv__ax_cv_ncursesw_cppflags"
+        ax_cv_ncursesw=yes
 
+fi
+
+
+        if test "x$ax_cv_ncursesw" = xno && test "x$with_ncursesw" = xyes; then :
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
-$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
-if ${ac_cv_path_GREP+:} false; then :
+            as_fn_error $? "--with-ncursesw specified but could not find NcursesW library" "$LINENO" 5
+
+fi
+
+        if test "x$ax_cv_ncursesw" = xyes; then :
+
+            ax_cv_curses=yes
+            ax_cv_curses_which=ncursesw
+            CURSES_LIBS="$pkg_cv__ax_cv_ncursesw_libs"
+            CURSES_CFLAGS="$pkg_cv__ax_cv_ncursesw_cppflags"
+
+$as_echo "#define HAVE_NCURSESW 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_CURSES 1" >>confdefs.h
+
+
+            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working ncursesw/curses.h" >&5
+$as_echo_n "checking for working ncursesw/curses.h... " >&6; }
+if ${ax_cv_header_ncursesw_curses_h+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -z "$GREP"; then
-  ac_path_GREP_found=false
-  # Loop through the user's path and test for each of PROGNAME-LIST
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_prog in grep ggrep; do
-    for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
-      as_fn_executable_p "$ac_path_GREP" || continue
-# Check for GNU ac_path_GREP and select it if it is found.
-  # Check for GNU $ac_path_GREP
-case `"$ac_path_GREP" --version 2>&1` in
-*GNU*)
-  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
-*)
-  ac_count=0
-  $as_echo_n 0123456789 >"conftest.in"
-  while :
-  do
-    cat "conftest.in" "conftest.in" >"conftest.tmp"
-    mv "conftest.tmp" "conftest.in"
-    cp "conftest.in" "conftest.nl"
-    $as_echo 'GREP' >> "conftest.nl"
-    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
-    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
-    as_fn_arith $ac_count + 1 && ac_count=$as_val
-    if test $ac_count -gt ${ac_path_GREP_max-0}; then
-      # Best one so far, save it but keep looking for a better one
-      ac_cv_path_GREP="$ac_path_GREP"
-      ac_path_GREP_max=$ac_count
-    fi
-    # 10*(2^10) chars as input seems more than enough
-    test $ac_count -gt 10 && break
-  done
-  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
-esac
 
-      $ac_path_GREP_found && break 3
-    done
-  done
-  done
-IFS=$as_save_IFS
-  if test -z "$ac_cv_path_GREP"; then
-    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
-  fi
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                        #define _XOPEN_SOURCE_EXTENDED 1
+                        #include <ncursesw/curses.h>
+
+int
+main ()
+{
+
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        attr_t d = WA_NORMAL;
+                        cchar_t e;
+                        wint_t f;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+                        wattr_set(stdscr, d, 0, NULL);
+                        wget_wch(stdscr, &f);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_header_ncursesw_curses_h=yes
 else
-  ac_cv_path_GREP=$GREP
+  ax_cv_header_ncursesw_curses_h=no
 fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
-$as_echo "$ac_cv_path_GREP" >&6; }
- GREP="$ac_cv_path_GREP"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_header_ncursesw_curses_h" >&5
+$as_echo "$ax_cv_header_ncursesw_curses_h" >&6; }
+            if test "x$ax_cv_header_ncursesw_curses_h" = xyes; then :
+
+                ax_cv_curses_enhanced=yes
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+
+$as_echo "#define HAVE_CURSES_ENHANCED 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_CURSES_COLOR 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_CURSES_OBSOLETE 1" >>confdefs.h
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
-$as_echo_n "checking for egrep... " >&6; }
-if ${ac_cv_path_EGREP+:} false; then :
+$as_echo "#define HAVE_NCURSESW_CURSES_H 1" >>confdefs.h
+
+
+fi
+
+            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working ncursesw.h" >&5
+$as_echo_n "checking for working ncursesw.h... " >&6; }
+if ${ax_cv_header_ncursesw_h+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
-   then ac_cv_path_EGREP="$GREP -E"
-   else
-     if test -z "$EGREP"; then
-  ac_path_EGREP_found=false
-  # Loop through the user's path and test for each of PROGNAME-LIST
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_prog in egrep; do
-    for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
-      as_fn_executable_p "$ac_path_EGREP" || continue
-# Check for GNU ac_path_EGREP and select it if it is found.
-  # Check for GNU $ac_path_EGREP
-case `"$ac_path_EGREP" --version 2>&1` in
-*GNU*)
-  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
-*)
-  ac_count=0
-  $as_echo_n 0123456789 >"conftest.in"
-  while :
-  do
-    cat "conftest.in" "conftest.in" >"conftest.tmp"
-    mv "conftest.tmp" "conftest.in"
-    cp "conftest.in" "conftest.nl"
-    $as_echo 'EGREP' >> "conftest.nl"
-    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
-    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
-    as_fn_arith $ac_count + 1 && ac_count=$as_val
-    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
-      # Best one so far, save it but keep looking for a better one
-      ac_cv_path_EGREP="$ac_path_EGREP"
-      ac_path_EGREP_max=$ac_count
-    fi
-    # 10*(2^10) chars as input seems more than enough
-    test $ac_count -gt 10 && break
-  done
-  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
-esac
 
-      $ac_path_EGREP_found && break 3
-    done
-  done
-  done
-IFS=$as_save_IFS
-  if test -z "$ac_cv_path_EGREP"; then
-    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
-  fi
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                        #define _XOPEN_SOURCE_EXTENDED 1
+                        #include <ncursesw.h>
+
+int
+main ()
+{
+
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        attr_t d = WA_NORMAL;
+                        cchar_t e;
+                        wint_t f;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+                        wattr_set(stdscr, d, 0, NULL);
+                        wget_wch(stdscr, &f);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_header_ncursesw_h=yes
 else
-  ac_cv_path_EGREP=$EGREP
+  ax_cv_header_ncursesw_h=no
 fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
-   fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
-$as_echo "$ac_cv_path_EGREP" >&6; }
- EGREP="$ac_cv_path_EGREP"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_header_ncursesw_h" >&5
+$as_echo "$ax_cv_header_ncursesw_h" >&6; }
+            if test "x$ax_cv_header_ncursesw_h" = xyes; then :
+
+                ax_cv_curses_enhanced=yes
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+
+$as_echo "#define HAVE_CURSES_ENHANCED 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_CURSES_COLOR 1" >>confdefs.h
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
-$as_echo_n "checking for ANSI C header files... " >&6; }
-if ${ac_cv_header_stdc+:} false; then :
+$as_echo "#define HAVE_CURSES_OBSOLETE 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_NCURSESW_H 1" >>confdefs.h
+
+
+fi
+
+            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working ncurses.h" >&5
+$as_echo_n "checking for working ncurses.h... " >&6; }
+if ${ax_cv_header_ncurses_h_with_ncursesw+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <float.h>
+
+                        #define _XOPEN_SOURCE_EXTENDED 1
+                        #include <ncurses.h>
 
 int
 main ()
 {
 
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        attr_t d = WA_NORMAL;
+                        cchar_t e;
+                        wint_t f;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+                        wattr_set(stdscr, d, 0, NULL);
+                        wget_wch(stdscr, &f);
+
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_header_stdc=yes
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_header_ncurses_h_with_ncursesw=yes
 else
-  ac_cv_header_stdc=no
+  ax_cv_header_ncurses_h_with_ncursesw=no
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
-if test $ac_cv_header_stdc = yes; then
-  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_header_ncurses_h_with_ncursesw" >&5
+$as_echo "$ax_cv_header_ncurses_h_with_ncursesw" >&6; }
+            if test "x$ax_cv_header_ncurses_h_with_ncursesw" = xyes; then :
+
+                ax_cv_curses_enhanced=yes
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+
+$as_echo "#define HAVE_CURSES_ENHANCED 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_CURSES_COLOR 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_CURSES_OBSOLETE 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_NCURSES_H 1" >>confdefs.h
+
+
+fi
+
+            if test "x$ax_cv_header_ncursesw_curses_h" = xno && test "x$ax_cv_header_ncursesw_h" = xno && test "x$ax_cv_header_ncurses_h_with_ncursesw" = xno; then :
+
+                { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: could not find a working ncursesw/curses.h, ncursesw.h or ncurses.h" >&5
+$as_echo "$as_me: WARNING: could not find a working ncursesw/curses.h, ncursesw.h or ncurses.h" >&2;}
+
+fi
+
+fi
+
+fi
+    unset pkg_cv__ax_cv_ncursesw_libs
+    unset pkg_cv__ax_cv_ncursesw_cppflags
+
+    # Test for Ncurses
+    if test "x$CURSES_LIBS" = x && test "x$with_ncurses" != xno && test "x$ax_cv_curses_which" = xno; then :
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ncurses via pkg-config" >&5
+$as_echo_n "checking for ncurses via pkg-config... " >&6; }
+
+
+
+    if test -n "$_ax_cv_ncurses_libs"; then
+    pkg_cv__ax_cv_ncurses_libs="$_ax_cv_ncurses_libs"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"ncurses\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "ncurses") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv__ax_cv_ncurses_libs=`$PKG_CONFIG --libs "ncurses" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+    if test -n "$_ax_cv_ncurses_cppflags"; then
+    pkg_cv__ax_cv_ncurses_cppflags="$_ax_cv_ncurses_cppflags"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"ncurses\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "ncurses") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv__ax_cv_ncurses_cppflags=`$PKG_CONFIG --cflags "ncurses" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+
+    if test "x$pkg_failed" = "xyes" || test "x$pkg_failed" = "xuntried"; then :
+
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+        # No suitable .pc file found, have to find flags via fallback
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ncurses via fallback" >&5
+$as_echo_n "checking for ncurses via fallback... " >&6; }
+if ${ax_cv_ncurses+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+            $as_echo
+            pkg_cv__ax_cv_ncurses_libs="-lncurses"
+            pkg_cv__ax_cv_ncurses_cppflags="-D_GNU_SOURCE $CURSES_CFLAGS"
+            LIBS="$ax_saved_LIBS $pkg_cv__ax_cv_ncurses_libs"
+            CPPFLAGS="$ax_saved_CPPFLAGS $pkg_cv__ax_cv_ncurses_cppflags"
+
+            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for initscr() with $pkg_cv__ax_cv_ncurses_libs" >&5
+$as_echo_n "checking for initscr() with $pkg_cv__ax_cv_ncurses_libs... " >&6; }
+            cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char initscr ();
+int
+main ()
+{
+return initscr ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+                    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+                    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for nodelay() with $pkg_cv__ax_cv_ncurses_libs" >&5
+$as_echo_n "checking for nodelay() with $pkg_cv__ax_cv_ncurses_libs... " >&6; }
+                    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <string.h>
 
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char nodelay ();
+int
+main ()
+{
+return nodelay ();
+  ;
+  return 0;
+}
 _ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "memchr" >/dev/null 2>&1; then :
+if ac_fn_c_try_link "$LINENO"; then :
+
+                        ax_cv_ncurses=yes
 
 else
-  ac_cv_header_stdc=no
+
+                        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+                        pkg_cv__ax_cv_ncurses_libs="$pkg_cv__ax_cv_ncurses_libs -ltinfo"
+
+                        LIBS="$ax_saved_LIBS $pkg_cv__ax_cv_ncurses_libs"
+
+                        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for nodelay() with $pkg_cv__ax_cv_ncurses_libs" >&5
+$as_echo_n "checking for nodelay() with $pkg_cv__ax_cv_ncurses_libs... " >&6; }
+                        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char nodelay ();
+int
+main ()
+{
+return nodelay ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+                            ax_cv_ncurses=yes
+
+else
+
+                            ax_cv_ncurses=no
+
 fi
-rm -f conftest*
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
 fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
-if test $ac_cv_header_stdc = yes; then
-  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else
+
+                    ax_cv_ncurses=no
+
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_ncurses" >&5
+$as_echo "$ax_cv_ncurses" >&6; }
+
+else
+
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+        # Found .pc file, using its information
+        LIBS="$ax_saved_LIBS $pkg_cv__ax_cv_ncurses_libs"
+        CPPFLAGS="$ax_saved_CPPFLAGS $pkg_cv__ax_cv_ncurses_cppflags"
+        ax_cv_ncurses=yes
+
+fi
+
+
+        if test "x$ax_cv_ncurses" = xno && test "x$with_ncurses" = xyes; then :
+
+            as_fn_error $? "--with-ncurses specified but could not find Ncurses library" "$LINENO" 5
+
+fi
+
+        if test "x$ax_cv_ncurses" = xyes; then :
+
+            ax_cv_curses=yes
+            ax_cv_curses_which=ncurses
+            CURSES_LIBS="$pkg_cv__ax_cv_ncurses_libs"
+            CURSES_CFLAGS="$pkg_cv__ax_cv_ncurses_cppflags"
+
+$as_echo "#define HAVE_NCURSES 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_CURSES 1" >>confdefs.h
+
+
+            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working ncurses/curses.h" >&5
+$as_echo_n "checking for working ncurses/curses.h... " >&6; }
+if ${ax_cv_header_ncurses_curses_h+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdlib.h>
 
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "free" >/dev/null 2>&1; then :
+                        #include <ncurses/curses.h>
+
+int
+main ()
+{
 
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_header_ncurses_curses_h=yes
 else
-  ac_cv_header_stdc=no
+  ax_cv_header_ncurses_curses_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+
 fi
-rm -f conftest*
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_header_ncurses_curses_h" >&5
+$as_echo "$ax_cv_header_ncurses_curses_h" >&6; }
+            if test "x$ax_cv_header_ncurses_curses_h" = xyes; then :
+
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+
+$as_echo "#define HAVE_CURSES_COLOR 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_CURSES_OBSOLETE 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_NCURSES_CURSES_H 1" >>confdefs.h
+
 
 fi
 
-if test $ac_cv_header_stdc = yes; then
-  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
-  if test "$cross_compiling" = yes; then :
-  :
+            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working ncurses.h" >&5
+$as_echo_n "checking for working ncurses.h... " >&6; }
+if ${ax_cv_header_ncurses_h+:} false; then :
+  $as_echo_n "(cached) " >&6
 else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <ctype.h>
-#include <stdlib.h>
-#if ((' ' & 0x0FF) == 0x020)
-# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
-# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
-#else
-# define ISLOWER(c) \
-		   (('a' <= (c) && (c) <= 'i') \
-		     || ('j' <= (c) && (c) <= 'r') \
-		     || ('s' <= (c) && (c) <= 'z'))
-# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
-#endif
 
-#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+                        #include <ncurses.h>
+
 int
 main ()
 {
-  int i;
-  for (i = 0; i < 256; i++)
-    if (XOR (islower (i), ISLOWER (i))
-	|| toupper (i) != TOUPPER (i))
-      return 2;
+
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        chtype c = COLOR_PAIR(1) & A_COLOR;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+                        init_pair(1, COLOR_WHITE, COLOR_RED);
+
+  ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_header_ncurses_h=yes
+else
+  ax_cv_header_ncurses_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_header_ncurses_h" >&5
+$as_echo "$ax_cv_header_ncurses_h" >&6; }
+            if test "x$ax_cv_header_ncurses_h" = xyes; then :
+
+                ax_cv_curses_color=yes
+                ax_cv_curses_obsolete=yes
+
+$as_echo "#define HAVE_CURSES_COLOR 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_CURSES_OBSOLETE 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_NCURSES_H 1" >>confdefs.h
+
+
+fi
+
+            if test "x$ax_cv_header_ncurses_curses_h" = xno && test "x$ax_cv_header_ncurses_h" = xno; then :
+
+                { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: could not find a working ncurses/curses.h or ncurses.h" >&5
+$as_echo "$as_me: WARNING: could not find a working ncurses/curses.h or ncurses.h" >&2;}
+
+fi
+
+fi
+
+fi
+    unset pkg_cv__ax_cv_ncurses_libs
+    unset pkg_cv__ax_cv_ncurses_cppflags
+
+    # Test for plain Curses (or if CURSES_LIBS was set by user)
+    if test "x$with_plaincurses" != xno && test "x$ax_cv_curses_which" = xno; then :
+
+        if test "x$CURSES_LIBS" != x; then :
+
+            LIBS="$ax_saved_LIBS $CURSES_LIBS"
 
 else
-  ac_cv_header_stdc=no
+
+            LIBS="$ax_saved_LIBS -lcurses"
+
 fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Curses library" >&5
+$as_echo_n "checking for Curses library... " >&6; }
+if ${ax_cv_plaincurses+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+            cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char initscr ();
+int
+main ()
+{
+return initscr ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_plaincurses=yes
+else
+  ax_cv_plaincurses=no
 fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_plaincurses" >&5
+$as_echo "$ax_cv_plaincurses" >&6; }
+
+        if test "x$ax_cv_plaincurses" = xyes; then :
+
+            ax_cv_curses=yes
+            ax_cv_curses_which=plaincurses
+            if test "x$CURSES_LIBS" = x; then :
+
+                CURSES_LIBS="-lcurses"
+
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5
-$as_echo "$ac_cv_header_stdc" >&6; }
-if test $ac_cv_header_stdc = yes; then
 
-$as_echo "#define STDC_HEADERS 1" >>confdefs.h
+$as_echo "#define HAVE_CURSES 1" >>confdefs.h
+
+
+            # Check for base conformance (and header file)
+
+            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working curses.h" >&5
+$as_echo_n "checking for working curses.h... " >&6; }
+if ${ax_cv_header_curses_h+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                        #include <curses.h>
+
+int
+main ()
+{
+
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        initscr();
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_header_curses_h=yes
+else
+  ax_cv_header_curses_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_header_curses_h" >&5
+$as_echo "$ax_cv_header_curses_h" >&6; }
+            if test "x$ax_cv_header_curses_h" = xyes; then :
 
-# On IRIX 5.3, sys/types and inttypes.h are conflicting.
-for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
-		  inttypes.h stdint.h unistd.h
-do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
-"
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+
+$as_echo "#define HAVE_CURSES_H 1" >>confdefs.h
+
+
+                # Check for X/Open Enhanced conformance
+
+                { $as_echo "$as_me:${as_lineno-$LINENO}: checking for X/Open Enhanced Curses conformance" >&5
+$as_echo_n "checking for X/Open Enhanced Curses conformance... " >&6; }
+if ${ax_cv_plaincurses_enhanced+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+                    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                            #define _XOPEN_SOURCE_EXTENDED 1
+                            #include <curses.h>
+                            #ifndef _XOPEN_CURSES
+                            #error "this Curses library is not enhanced"
+                            "this Curses library is not enhanced"
+                            #endif
+
+int
+main ()
+{
+
+                            chtype a = A_BOLD;
+                            int b = KEY_LEFT;
+                            chtype c = COLOR_PAIR(1) & A_COLOR;
+                            attr_t d = WA_NORMAL;
+                            cchar_t e;
+                            wint_t f;
+                            initscr();
+                            init_pair(1, COLOR_WHITE, COLOR_RED);
+                            wattr_set(stdscr, d, 0, NULL);
+                            wget_wch(stdscr, &f);
+
+  ;
+  return 0;
+}
 _ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_plaincurses_enhanced=yes
+else
+  ax_cv_plaincurses_enhanced=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
 
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_plaincurses_enhanced" >&5
+$as_echo "$ax_cv_plaincurses_enhanced" >&6; }
+                if test "x$ax_cv_plaincurses_enhanced" = xyes; then :
 
-done
+                    ax_cv_curses_enhanced=yes
+                    ax_cv_curses_color=yes
 
+$as_echo "#define HAVE_CURSES_ENHANCED 1" >>confdefs.h
 
-for ac_header in ncurses.h
-do :
-  ac_fn_c_check_header_mongrel "$LINENO" "ncurses.h" "ac_cv_header_ncurses_h" "$ac_includes_default"
-if test "x$ac_cv_header_ncurses_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_NCURSES_H 1
+
+$as_echo "#define HAVE_CURSES_COLOR 1" >>confdefs.h
+
+
+fi
+
+                # Check for color functions
+
+                { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Curses color functions" >&5
+$as_echo_n "checking for Curses color functions... " >&6; }
+if ${ax_cv_plaincurses_color+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+                    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                        #define _XOPEN_SOURCE_EXTENDED 1
+                        #include <curses.h>
+
+int
+main ()
+{
+
+                            chtype a = A_BOLD;
+                            int b = KEY_LEFT;
+                            chtype c = COLOR_PAIR(1) & A_COLOR;
+                            initscr();
+                            init_pair(1, COLOR_WHITE, COLOR_RED);
+
+  ;
+  return 0;
+}
 _ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_plaincurses_color=yes
+else
+  ax_cv_plaincurses_color=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_plaincurses_color" >&5
+$as_echo "$ax_cv_plaincurses_color" >&6; }
+                if test "x$ax_cv_plaincurses_color" = xyes; then :
+
+                    ax_cv_curses_color=yes
+
+$as_echo "#define HAVE_CURSES_COLOR 1" >>confdefs.h
+
+
+fi
+
+                # Check for obsolete functions
 
+                { $as_echo "$as_me:${as_lineno-$LINENO}: checking for obsolete Curses functions" >&5
+$as_echo_n "checking for obsolete Curses functions... " >&6; }
+if ${ax_cv_plaincurses_obsolete+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                        #include <curses.h>
+
+int
+main ()
+{
+
+                        chtype a = A_BOLD;
+                        int b = KEY_LEFT;
+                        int g = getattrs(stdscr);
+                        int h = getcurx(stdscr) + getmaxx(stdscr);
+                        initscr();
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ax_cv_plaincurses_obsolete=yes
 else
-  as_fn_error $? "missing ncurses.h" "$LINENO" 5
+  ax_cv_plaincurses_obsolete=no
 fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_plaincurses_obsolete" >&5
+$as_echo "$ax_cv_plaincurses_obsolete" >&6; }
+                if test "x$ax_cv_plaincurses_obsolete" = xyes; then :
+
+                    ax_cv_curses_obsolete=yes
+
+$as_echo "#define HAVE_CURSES_OBSOLETE 1" >>confdefs.h
 
-done
 
+fi
+
+fi
+
+            if test "x$ax_cv_header_curses_h" = xno; then :
+
+                { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: could not find a working curses.h" >&5
+$as_echo "$as_me: WARNING: could not find a working curses.h" >&2;}
+
+fi
+
+fi
+
+fi
+
+    if test "x$ax_cv_curses"          != xyes; then :
+  ax_cv_curses=no
+fi
+    if test "x$ax_cv_curses_enhanced" != xyes; then :
+  ax_cv_curses_enhanced=no
+fi
+    if test "x$ax_cv_curses_color"    != xyes; then :
+  ax_cv_curses_color=no
+fi
+    if test "x$ax_cv_curses_obsolete" != xyes; then :
+  ax_cv_curses_obsolete=no
+fi
+
+    LIBS=$ax_saved_LIBS
+    CPPFLAGS=$ax_saved_CPPFLAGS
+
+    unset ax_saved_LIBS
+    unset ax_saved_CPPFLAGS
+
+if test "x$ax_cv_curses" != xyes; then
+	as_fn_error $? "requires an X/Open-compatible Curses library with color" "$LINENO" 5
+fi
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/configure.ac b/configure.ac
index e131279..231f66f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,5 +5,8 @@ AC_CONFIG_FILES([
 				 Makefile 
 				 src/Makefile
 				 ])
-AC_CHECK_HEADERS([ncurses.h], [], AC_MSG_ERROR(missing ncurses.h))
+AX_WITH_CURSES
+if test "x$ax_cv_curses" != xyes; then
+	AC_MSG_ERROR([requires an X/Open-compatible Curses library with color])
+fi
 AC_OUTPUT
diff --git a/src/Makefile.am b/src/Makefile.am
index 23352ae..96cf15d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,4 +2,5 @@ EXTRA_DIST = include
 
 bin_PROGRAMS = simple-snake
 simple_snake_SOURCES = body.c draw.c
-simple_snake_LDADD = -lncurses -lm
+simple_snake_LDADD = @CURSES_LIBS@ -lm
+simple_snake_CPPFLAGS = @CURSES_CFLAGS@
diff --git a/src/Makefile.in b/src/Makefile.in
index de42608..0dafc1e 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -98,7 +98,8 @@ CONFIG_CLEAN_FILES =
 CONFIG_CLEAN_VPATH_FILES =
 am__installdirs = "$(DESTDIR)$(bindir)"
 PROGRAMS = $(bin_PROGRAMS)
-am_simple_snake_OBJECTS = body.$(OBJEXT) draw.$(OBJEXT)
+am_simple_snake_OBJECTS = simple_snake-body.$(OBJEXT) \
+	simple_snake-draw.$(OBJEXT)
 simple_snake_OBJECTS = $(am_simple_snake_OBJECTS)
 simple_snake_DEPENDENCIES =
 AM_V_P = $(am__v_P_@AM_V@)
@@ -116,8 +117,13 @@ am__v_at_1 =
 DEFAULT_INCLUDES = -I.@am__isrc@
 depcomp = $(SHELL) $(top_srcdir)/depcomp
 am__maybe_remake_depfiles = depfiles
-am__depfiles_remade = ./$(DEPDIR)/body.Po ./$(DEPDIR)/draw.Po
+am__depfiles_remade = ./$(DEPDIR)/simple_snake-body.Po \
+	./$(DEPDIR)/simple_snake-draw.Po
 am__mv = mv -f
+AM_V_lt = $(am__v_lt_@AM_V@)
+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
+am__v_lt_0 = --silent
+am__v_lt_1 = 
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
 AM_V_CC = $(am__v_CC_@AM_V@)
@@ -168,17 +174,16 @@ AWK = @AWK@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CFLAGS = @CFLAGS@
-CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
+CURSES_CFLAGS = @CURSES_CFLAGS@
+CURSES_LIBS = @CURSES_LIBS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
-EGREP = @EGREP@
 EXEEXT = @EXEEXT@
-GREP = @GREP@
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
@@ -199,6 +204,9 @@ PACKAGE_TARNAME = @PACKAGE_TARNAME@
 PACKAGE_URL = @PACKAGE_URL@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 SET_MAKE = @SET_MAKE@
 SHELL = @SHELL@
 STRIP = @STRIP@
@@ -248,7 +256,8 @@ top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 EXTRA_DIST = include
 simple_snake_SOURCES = body.c draw.c
-simple_snake_LDADD = -lncurses -lm
+simple_snake_LDADD = @CURSES_LIBS@ -lm
+simple_snake_CPPFLAGS = @CURSES_CFLAGS@
 all: all-am
 
 .SUFFIXES:
@@ -335,8 +344,8 @@ mostlyclean-compile:
 distclean-compile:
 	-rm -f *.tab.c
 
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/body.Po@am__quote@ # am--include-marker
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/draw.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/simple_snake-body.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/simple_snake-draw.Po@am__quote@ # am--include-marker
 
 $(am__depfiles_remade):
 	@$(MKDIR_P) $(@D)
@@ -358,6 +367,34 @@ am--depfiles: $(am__depfiles_remade)
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
 
+simple_snake-body.o: body.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(simple_snake_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT simple_snake-body.o -MD -MP -MF $(DEPDIR)/simple_snake-body.Tpo -c -o simple_snake-body.o `test -f 'body.c' || echo '$(srcdir)/'`body.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/simple_snake-body.Tpo $(DEPDIR)/simple_snake-body.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='body.c' object='simple_snake-body.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(simple_snake_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o simple_snake-body.o `test -f 'body.c' || echo '$(srcdir)/'`body.c
+
+simple_snake-body.obj: body.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(simple_snake_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT simple_snake-body.obj -MD -MP -MF $(DEPDIR)/simple_snake-body.Tpo -c -o simple_snake-body.obj `if test -f 'body.c'; then $(CYGPATH_W) 'body.c'; else $(CYGPATH_W) '$(srcdir)/body.c'; fi`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/simple_snake-body.Tpo $(DEPDIR)/simple_snake-body.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='body.c' object='simple_snake-body.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(simple_snake_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o simple_snake-body.obj `if test -f 'body.c'; then $(CYGPATH_W) 'body.c'; else $(CYGPATH_W) '$(srcdir)/body.c'; fi`
+
+simple_snake-draw.o: draw.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(simple_snake_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT simple_snake-draw.o -MD -MP -MF $(DEPDIR)/simple_snake-draw.Tpo -c -o simple_snake-draw.o `test -f 'draw.c' || echo '$(srcdir)/'`draw.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/simple_snake-draw.Tpo $(DEPDIR)/simple_snake-draw.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='draw.c' object='simple_snake-draw.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(simple_snake_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o simple_snake-draw.o `test -f 'draw.c' || echo '$(srcdir)/'`draw.c
+
+simple_snake-draw.obj: draw.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(simple_snake_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT simple_snake-draw.obj -MD -MP -MF $(DEPDIR)/simple_snake-draw.Tpo -c -o simple_snake-draw.obj `if test -f 'draw.c'; then $(CYGPATH_W) 'draw.c'; else $(CYGPATH_W) '$(srcdir)/draw.c'; fi`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/simple_snake-draw.Tpo $(DEPDIR)/simple_snake-draw.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='draw.c' object='simple_snake-draw.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(simple_snake_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o simple_snake-draw.obj `if test -f 'draw.c'; then $(CYGPATH_W) 'draw.c'; else $(CYGPATH_W) '$(srcdir)/draw.c'; fi`
+
 ID: $(am__tagged_files)
 	$(am__define_uniq_tagged_files); mkid -fID $$unique
 tags: tags-am
@@ -485,8 +522,8 @@ clean: clean-am
 clean-am: clean-binPROGRAMS clean-generic mostlyclean-am
 
 distclean: distclean-am
-		-rm -f ./$(DEPDIR)/body.Po
-	-rm -f ./$(DEPDIR)/draw.Po
+		-rm -f ./$(DEPDIR)/simple_snake-body.Po
+	-rm -f ./$(DEPDIR)/simple_snake-draw.Po
 	-rm -f Makefile
 distclean-am: clean-am distclean-compile distclean-generic \
 	distclean-tags
@@ -532,8 +569,8 @@ install-ps-am:
 installcheck-am:
 
 maintainer-clean: maintainer-clean-am
-		-rm -f ./$(DEPDIR)/body.Po
-	-rm -f ./$(DEPDIR)/draw.Po
+		-rm -f ./$(DEPDIR)/simple_snake-body.Po
+	-rm -f ./$(DEPDIR)/simple_snake-draw.Po
 	-rm -f Makefile
 maintainer-clean-am: distclean-am maintainer-clean-generic