mirror of
https://github.com/Relintai/sdl2_frt.git
synced 2024-12-16 11:06:49 +01:00
b72938c861
An existing hint lets apps that don't need the timer resolution changed avoid this, to save battery, etc, but this fixes several problems in timing, audio callbacks not firing fast enough, etc. Fixes Bugzilla #2944.
203 lines
6.8 KiB
Plaintext
203 lines
6.8 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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# serial 1
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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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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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AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
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no_sdl=""
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if test "$SDL2_CONFIG" = "no" ; then
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no_sdl=yes
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else
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SDL_CFLAGS=`$SDL2_CONFIG $sdl_config_args --cflags`
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SDL_LIBS=`$SDL2_CONFIG $sdl_config_args --libs`
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sdl_major_version=`$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_TRY_RUN([
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "SDL.h"
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char*
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my_strdup (char *str)
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{
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char *new_str;
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if (str)
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{
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new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
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strcpy (new_str, str);
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}
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else
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new_str = NULL;
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return new_str;
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}
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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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char *tmp_version;
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/* This hangs on some systems (?)
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system ("touch conf.sdltest");
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*/
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{ FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
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/* HP/UX 9 (%@#!) writes to sscanf strings */
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tmp_version = my_strdup("$min_sdl_version");
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if (sscanf(tmp_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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fi
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if test "x$no_sdl" = x ; then
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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fi
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fi
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if test "x$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_TRY_LINK([
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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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