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b02c8267f9
When cross-compiling, pkg.m4 will set the PKG_CONFIG variable to a suitable pkg-config executable, which might be a host-architecture-prefixed name like aarch64-linux-gnu-pkg-config. This ensures that we will use a suitable search path that is suitable for the host architecture (the machine we are compiling for) rather than the build architecture (the machine we are compiling on) to find dependency libraries like SDL. When using pkg-config as a substitute for sdl2-config, we will similarly need to use the host-architecture-prefixed pkg-config. Setting the PKG_CONFIG environment variable is also the canonical way to request that a different pkg-config implementation be used, if that becomes necessary for some reason. Co-authored-by: Helmut Grohne <helmut@subdivi.de> Bug-Debian: https://bugs.debian.org/1059749 Signed-off-by: Simon McVittie <smcv@collabora.com>
216 lines
7.7 KiB
Plaintext
216 lines
7.7 KiB
Plaintext
# Configure paths for SDL
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# Sam Lantinga 9/21/99
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# stolen from Manish Singh
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# stolen back from Frank Belew
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# stolen from Manish Singh
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# Shamelessly stolen from Owen Taylor
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#
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# Changelog:
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# * also look for SDL2.framework under Mac OS X
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# * removed HP/UX 9 support.
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# * updated for newer autoconf.
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# * (v3) use $PKG_CONFIG for pkg-config cross-compiling support
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# serial 3
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dnl AM_PATH_SDL2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
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dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
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dnl
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AC_DEFUN([AM_PATH_SDL2],
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[dnl
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dnl Get the cflags and libraries from the sdl2-config script
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dnl
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AC_ARG_WITH(sdl-prefix,[ --with-sdl-prefix=PFX Prefix where SDL is installed (optional)],
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sdl_prefix="$withval", sdl_prefix="")
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AC_ARG_WITH(sdl-exec-prefix,[ --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
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sdl_exec_prefix="$withval", sdl_exec_prefix="")
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AC_ARG_ENABLE(sdltest, [ --disable-sdltest Do not try to compile and run a test SDL program],
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, enable_sdltest=yes)
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AC_ARG_ENABLE(sdlframework, [ --disable-sdlframework Do not search for SDL2.framework],
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, search_sdl_framework=yes)
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AC_ARG_VAR(SDL2_FRAMEWORK, [Path to SDL2.framework])
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min_sdl_version=ifelse([$1], ,2.0.0,$1)
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if test "x$sdl_prefix$sdl_exec_prefix" = x ; then
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PKG_CHECK_MODULES([SDL], [sdl2 >= $min_sdl_version],
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[sdl_pc=yes],
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[sdl_pc=no])
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else
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sdl_pc=no
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if test x$sdl_exec_prefix != x ; then
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sdl_config_args="$sdl_config_args --exec-prefix=$sdl_exec_prefix"
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if test x${SDL2_CONFIG+set} != xset ; then
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SDL2_CONFIG=$sdl_exec_prefix/bin/sdl2-config
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fi
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fi
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if test x$sdl_prefix != x ; then
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sdl_config_args="$sdl_config_args --prefix=$sdl_prefix"
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if test x${SDL2_CONFIG+set} != xset ; then
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SDL2_CONFIG=$sdl_prefix/bin/sdl2-config
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fi
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fi
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fi
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if test "x$sdl_pc" = xyes ; then
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no_sdl=""
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SDL2_CONFIG="$PKG_CONFIG sdl2"
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else
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as_save_PATH="$PATH"
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if test "x$prefix" != xNONE && test "$cross_compiling" != yes; then
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PATH="$prefix/bin:$prefix/usr/bin:$PATH"
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fi
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AC_PATH_PROG(SDL2_CONFIG, sdl2-config, no, [$PATH])
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PATH="$as_save_PATH"
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no_sdl=""
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if test "$SDL2_CONFIG" = "no" -a "x$search_sdl_framework" = "xyes"; then
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AC_MSG_CHECKING(for SDL2.framework)
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if test "x$SDL2_FRAMEWORK" != x; then
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sdl_framework=$SDL2_FRAMEWORK
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else
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for d in / ~/ /System/; do
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if test -d "${d}Library/Frameworks/SDL2.framework"; then
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sdl_framework="${d}Library/Frameworks/SDL2.framework"
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fi
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done
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fi
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if test x"$sdl_framework" != x && test -d "$sdl_framework"; then
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AC_MSG_RESULT($sdl_framework)
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sdl_framework_dir=`dirname $sdl_framework`
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SDL_CFLAGS="-F$sdl_framework_dir -Wl,-framework,SDL2 -I$sdl_framework/include"
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SDL_LIBS="-F$sdl_framework_dir -Wl,-framework,SDL2"
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else
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no_sdl=yes
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fi
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fi
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if test "$SDL2_CONFIG" != "no"; then
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if test "x$sdl_pc" = "xno"; then
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AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
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SDL_CFLAGS=`$SDL2_CONFIG $sdl_config_args --cflags`
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SDL_LIBS=`$SDL2_CONFIG $sdl_config_args --libs`
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fi
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sdl_major_version=`$SDL2_CONFIG $sdl_config_args --version | \
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sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
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sdl_minor_version=`$SDL2_CONFIG $sdl_config_args --version | \
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sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
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sdl_micro_version=`$SDL2_CONFIG $sdl_config_args --version | \
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sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
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if test "x$enable_sdltest" = "xyes" ; then
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ac_save_CFLAGS="$CFLAGS"
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ac_save_CXXFLAGS="$CXXFLAGS"
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ac_save_LIBS="$LIBS"
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CFLAGS="$CFLAGS $SDL_CFLAGS"
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CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
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LIBS="$LIBS $SDL_LIBS"
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dnl
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dnl Now check if the installed SDL is sufficiently new. (Also sanity
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dnl checks the results of sdl2-config to some extent
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dnl
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rm -f conf.sdltest
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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#include <stdio.h>
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#include <stdlib.h>
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#include "SDL.h"
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int main (int argc, char *argv[])
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{
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int major, minor, micro;
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FILE *fp = fopen("conf.sdltest", "w");
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if (fp) fclose(fp);
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if (sscanf("$min_sdl_version", "%d.%d.%d", &major, &minor, µ) != 3) {
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printf("%s, bad version string\n", "$min_sdl_version");
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exit(1);
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}
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if (($sdl_major_version > major) ||
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(($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
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(($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
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{
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return 0;
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}
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else
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{
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printf("\n*** 'sdl2-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
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printf("*** of SDL required is %d.%d.%d. If sdl2-config is correct, then it is\n", major, minor, micro);
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printf("*** best to upgrade to the required version.\n");
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printf("*** If sdl2-config was wrong, set the environment variable SDL2_CONFIG\n");
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printf("*** to point to the correct copy of sdl2-config, and remove the file\n");
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printf("*** config.cache before re-running configure\n");
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return 1;
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}
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}
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]])], [], [no_sdl=yes], [echo $ac_n "cross compiling; assumed OK... $ac_c"])
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CFLAGS="$ac_save_CFLAGS"
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CXXFLAGS="$ac_save_CXXFLAGS"
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LIBS="$ac_save_LIBS"
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fi
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if test "x$sdl_pc" = "xno"; then
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if test "x$no_sdl" = "xyes"; then
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AC_MSG_RESULT(no)
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else
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AC_MSG_RESULT(yes)
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fi
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fi
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fi
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fi
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if test "x$no_sdl" = x ; then
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ifelse([$2], , :, [$2])
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else
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if test "$SDL2_CONFIG" = "no" ; then
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echo "*** The sdl2-config script installed by SDL could not be found"
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echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
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echo "*** your path, or set the SDL2_CONFIG environment variable to the"
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echo "*** full path to sdl2-config."
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else
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if test -f conf.sdltest ; then
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:
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else
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echo "*** Could not run SDL test program, checking why..."
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CFLAGS="$CFLAGS $SDL_CFLAGS"
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CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
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LIBS="$LIBS $SDL_LIBS"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <stdio.h>
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#include "SDL.h"
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int main(int argc, char *argv[])
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{ return 0; }
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#undef main
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#define main K_and_R_C_main
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]], [[ return 0; ]])],
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[ echo "*** The test program compiled, but did not run. This usually means"
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echo "*** that the run-time linker is not finding SDL or finding the wrong"
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echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
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echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
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echo "*** to the installed location Also, make sure you have run ldconfig if that"
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echo "*** is required on your system"
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echo "***"
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echo "*** If you have an old version installed, it is best to remove it, although"
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echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
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[ echo "*** The test program failed to compile or link. See the file config.log for the"
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echo "*** exact error that occured. This usually means SDL was incorrectly installed"
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echo "*** or that you have moved SDL since it was installed. In the latter case, you"
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echo "*** may want to edit the sdl2-config script: $SDL2_CONFIG" ])
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CFLAGS="$ac_save_CFLAGS"
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CXXFLAGS="$ac_save_CXXFLAGS"
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LIBS="$ac_save_LIBS"
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fi
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fi
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SDL_CFLAGS=""
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SDL_LIBS=""
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ifelse([$3], , :, [$3])
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fi
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AC_SUBST(SDL_CFLAGS)
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AC_SUBST(SDL_LIBS)
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rm -f conf.sdltest
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])
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