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Diffstat (limited to 'aclocal.m4')
| -rw-r--r-- | aclocal.m4 | 2100 |
1 files changed, 2100 insertions, 0 deletions
diff --git a/aclocal.m4 b/aclocal.m4 new file mode 100644 index 0000000..c13f0a0 --- /dev/null +++ b/aclocal.m4 @@ -0,0 +1,2100 @@ +# generated automatically by aclocal 1.16.1 -*- Autoconf -*- + +# Copyright (C) 1996-2018 Free Software Foundation, Inc. + +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])]) +m4_ifndef([AC_AUTOCONF_VERSION], + [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl +m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],, +[m4_warning([this file was generated for autoconf 2.69. +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 11 (pkg-config-0.29.1) + +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], [0.29.1]) +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 $1]) + +_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 + +dnl PKG_WITH_MODULES(VARIABLE-PREFIX, MODULES, +dnl [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND], +dnl [DESCRIPTION], [DEFAULT]) +dnl ------------------------------------------ +dnl +dnl Prepare a "--with-" configure option using the lowercase +dnl [VARIABLE-PREFIX] name, merging the behaviour of AC_ARG_WITH and +dnl PKG_CHECK_MODULES in a single macro. +AC_DEFUN([PKG_WITH_MODULES], +[ +m4_pushdef([with_arg], m4_tolower([$1])) + +m4_pushdef([description], + [m4_default([$5], [build with ]with_arg[ support])]) + +m4_pushdef([def_arg], [m4_default([$6], [auto])]) +m4_pushdef([def_action_if_found], [AS_TR_SH([with_]with_arg)=yes]) +m4_pushdef([def_action_if_not_found], [AS_TR_SH([with_]with_arg)=no]) + +m4_case(def_arg, + [yes],[m4_pushdef([with_without], [--without-]with_arg)], + [m4_pushdef([with_without],[--with-]with_arg)]) + +AC_ARG_WITH(with_arg, + AS_HELP_STRING(with_without, description[ @<:@default=]def_arg[@:>@]),, + [AS_TR_SH([with_]with_arg)=def_arg]) + +AS_CASE([$AS_TR_SH([with_]with_arg)], + [yes],[PKG_CHECK_MODULES([$1],[$2],$3,$4)], + [auto],[PKG_CHECK_MODULES([$1],[$2], + [m4_n([def_action_if_found]) $3], + [m4_n([def_action_if_not_found]) $4])]) + +m4_popdef([with_arg]) +m4_popdef([description]) +m4_popdef([def_arg]) + +])dnl PKG_WITH_MODULES + +dnl PKG_HAVE_WITH_MODULES(VARIABLE-PREFIX, MODULES, +dnl [DESCRIPTION], [DEFAULT]) +dnl ----------------------------------------------- +dnl +dnl Convenience macro to trigger AM_CONDITIONAL after PKG_WITH_MODULES +dnl check._[VARIABLE-PREFIX] is exported as make variable. +AC_DEFUN([PKG_HAVE_WITH_MODULES], +[ +PKG_WITH_MODULES([$1],[$2],,,[$3],[$4]) + +AM_CONDITIONAL([HAVE_][$1], + [test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"]) +])dnl PKG_HAVE_WITH_MODULES + +dnl PKG_HAVE_DEFINE_WITH_MODULES(VARIABLE-PREFIX, MODULES, +dnl [DESCRIPTION], [DEFAULT]) +dnl ------------------------------------------------------ +dnl +dnl Convenience macro to run AM_CONDITIONAL and AC_DEFINE after +dnl PKG_WITH_MODULES check. HAVE_[VARIABLE-PREFIX] is exported as make +dnl and preprocessor variable. +AC_DEFUN([PKG_HAVE_DEFINE_WITH_MODULES], +[ +PKG_HAVE_WITH_MODULES([$1],[$2],[$3],[$4]) + +AS_IF([test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"], + [AC_DEFINE([HAVE_][$1], 1, [Enable ]m4_tolower([$1])[ support])]) +])dnl PKG_HAVE_DEFINE_WITH_MODULES + +# Copyright (C) 2002-2018 Free Software Foundation, Inc. +# +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# AM_AUTOMAKE_VERSION(VERSION) +# ---------------------------- +# Automake X.Y traces this macro to ensure aclocal.m4 has been +# generated from the m4 files accompanying Automake X.Y. +# (This private macro should not be called outside this file.) +AC_DEFUN([AM_AUTOMAKE_VERSION], +[am__api_version='1.16' +dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to +dnl require some minimum version. Point them to the right macro. +m4_if([$1], [1.16.1], [], + [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl +]) + +# _AM_AUTOCONF_VERSION(VERSION) +# ----------------------------- +# aclocal traces this macro to find the Autoconf version. +# This is a private macro too. Using m4_define simplifies +# the logic in aclocal, which can simply ignore this definition. +m4_define([_AM_AUTOCONF_VERSION], []) + +# AM_SET_CURRENT_AUTOMAKE_VERSION +# ------------------------------- +# Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced. +# This function is AC_REQUIREd by AM_INIT_AUTOMAKE. +AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION], +[AM_AUTOMAKE_VERSION([1.16.1])dnl +m4_ifndef([AC_AUTOCONF_VERSION], + [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl +_AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))]) + +# AM_AUX_DIR_EXPAND -*- Autoconf -*- + +# Copyright (C) 2001-2018 Free Software Foundation, Inc. +# +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets +# $ac_aux_dir to '$srcdir/foo'. In other projects, it is set to +# '$srcdir', '$srcdir/..', or '$srcdir/../..'. +# +# Of course, Automake must honor this variable whenever it calls a +# tool from the auxiliary directory. The problem is that $srcdir (and +# therefore $ac_aux_dir as well) can be either absolute or relative, +# depending on how configure is run. This is pretty annoying, since +# it makes $ac_aux_dir quite unusable in subdirectories: in the top +# source directory, any form will work fine, but in subdirectories a +# relative path needs to be adjusted first. +# +# $ac_aux_dir/missing +# fails when called from a subdirectory if $ac_aux_dir is relative +# $top_srcdir/$ac_aux_dir/missing +# fails if $ac_aux_dir is absolute, +# fails when called from a subdirectory in a VPATH build with +# a relative $ac_aux_dir +# +# The reason of the latter failure is that $top_srcdir and $ac_aux_dir +# are both prefixed by $srcdir. In an in-source build this is usually +# harmless because $srcdir is '.', but things will broke when you +# start a VPATH build or use an absolute $srcdir. +# +# So we could use something similar to $top_srcdir/$ac_aux_dir/missing, +# iff we strip the leading $srcdir from $ac_aux_dir. That would be: +# am_aux_dir='\$(top_srcdir)/'`expr "$ac_aux_dir" : "$srcdir//*\(.*\)"` +# and then we would define $MISSING as +# MISSING="\${SHELL} $am_aux_dir/missing" +# This will work as long as MISSING is not called from configure, because +# unfortunately $(top_srcdir) has no meaning in configure. +# However there are other variables, like CC, which are often used in +# configure, and could therefore not use this "fixed" $ac_aux_dir. +# +# Another solution, used here, is to always expand $ac_aux_dir to an +# absolute PATH. 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