1# Configure paths for SDL 2# Sam Lantinga 9/21/99 3# stolen from Manish Singh 4# stolen back from Frank Belew 5# stolen from Manish Singh 6# Shamelessly stolen from Owen Taylor 7 8dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]]) 9dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS 10dnl 11AC_DEFUN(AM_PATH_SDL, 12[dnl 13dnl Get the cflags and libraries from the sdl-config script 14dnl 15AC_ARG_WITH(sdl-prefix,[ --with-sdl-prefix=PFX Prefix where SDL is installed (optional)], 16 sdl_prefix="$withval", sdl_prefix="") 17AC_ARG_WITH(sdl-exec-prefix,[ --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)], 18 sdl_exec_prefix="$withval", sdl_exec_prefix="") 19AC_ARG_ENABLE(sdltest, [ --disable-sdltest Do not try to compile and run a test SDL program], 20 , enable_sdltest=yes) 21 22 if test x$sdl_exec_prefix != x ; then 23 sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix" 24 if test x${SDL_CONFIG+set} != xset ; then 25 SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config 26 fi 27 fi 28 if test x$sdl_prefix != x ; then 29 sdl_args="$sdl_args --prefix=$sdl_prefix" 30 if test x${SDL_CONFIG+set} != xset ; then 31 SDL_CONFIG=$sdl_prefix/bin/sdl-config 32 fi 33 fi 34 35 AC_REQUIRE([AC_CANONICAL_TARGET]) 36 AC_PATH_PROG(SDL_CONFIG, sdl-config, no) 37 min_sdl_version=ifelse([$1], ,0.11.0,$1) 38 AC_MSG_CHECKING(for SDL - version >= $min_sdl_version) 39 no_sdl="" 40 if test "$SDL_CONFIG" = "no" ; then 41 no_sdl=yes 42 else 43 SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags` 44 SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs` 45 46 sdl_major_version=`$SDL_CONFIG $sdl_args --version | \ 47 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'` 48 sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \ 49 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'` 50 sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \ 51 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'` 52 if test "x$enable_sdltest" = "xyes" ; then 53 ac_save_CFLAGS="$CFLAGS" 54 ac_save_LIBS="$LIBS" 55 CFLAGS="$CFLAGS $SDL_CFLAGS" 56 LIBS="$LIBS $SDL_LIBS" 57dnl 58dnl Now check if the installed SDL is sufficiently new. (Also sanity 59dnl checks the results of sdl-config to some extent 60dnl 61 rm -f conf.sdltest 62 AC_TRY_RUN([ 63#include <stdio.h> 64#include <stdlib.h> 65#include <string.h> 66#include "SDL.h" 67 68char* 69my_strdup (char *str) 70{ 71 char *new_str; 72 73 if (str) 74 { 75 new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char)); 76 strcpy (new_str, str); 77 } 78 else 79 new_str = NULL; 80 81 return new_str; 82} 83 84int main (int argc, char *argv[]) 85{ 86 int major, minor, micro; 87 char *tmp_version; 88 89 /* This hangs on some systems (?) 90 system ("touch conf.sdltest"); 91 */ 92 { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); } 93 94 /* HP/UX 9 (%@#!) writes to sscanf strings */ 95 tmp_version = my_strdup("$min_sdl_version"); 96 if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, µ) != 3) { 97 printf("%s, bad version string\n", "$min_sdl_version"); 98 exit(1); 99 } 100 101 if (($sdl_major_version > major) || 102 (($sdl_major_version == major) && ($sdl_minor_version > minor)) || 103 (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro))) 104 { 105 return 0; 106 } 107 else 108 { 109 printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version); 110 printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro); 111 printf("*** best to upgrade to the required version.\n"); 112 printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n"); 113 printf("*** to point to the correct copy of sdl-config, and remove the file\n"); 114 printf("*** config.cache before re-running configure\n"); 115 return 1; 116 } 117} 118 119],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"]) 120 CFLAGS="$ac_save_CFLAGS" 121 LIBS="$ac_save_LIBS" 122 fi 123 fi 124 if test "x$no_sdl" = x ; then 125 AC_MSG_RESULT(yes) 126 ifelse([$2], , :, [$2]) 127 else 128 AC_MSG_RESULT(no) 129 if test "$SDL_CONFIG" = "no" ; then 130 echo "*** The sdl-config script installed by SDL could not be found" 131 echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in" 132 echo "*** your path, or set the SDL_CONFIG environment variable to the" 133 echo "*** full path to sdl-config." 134 else 135 if test -f conf.sdltest ; then 136 : 137 else 138 echo "*** Could not run SDL test program, checking why..." 139 CFLAGS="$CFLAGS $SDL_CFLAGS" 140 LIBS="$LIBS $SDL_LIBS" 141 AC_TRY_LINK([ 142#include <stdio.h> 143#include "SDL.h" 144 145int main(int argc, char *argv[]) 146{ return 0; } 147#undef main 148#define main K_and_R_C_main 149], [ return 0; ], 150 [ echo "*** The test program compiled, but did not run. This usually means" 151 echo "*** that the run-time linker is not finding SDL or finding the wrong" 152 echo "*** version of SDL. If it is not finding SDL, you'll need to set your" 153 echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point" 154 echo "*** to the installed location Also, make sure you have run ldconfig if that" 155 echo "*** is required on your system" 156 echo "***" 157 echo "*** If you have an old version installed, it is best to remove it, although" 158 echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"], 159 [ echo "*** The test program failed to compile or link. See the file config.log for the" 160 echo "*** exact error that occured. This usually means SDL was incorrectly installed" 161 echo "*** or that you have moved SDL since it was installed. In the latter case, you" 162 echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ]) 163 CFLAGS="$ac_save_CFLAGS" 164 LIBS="$ac_save_LIBS" 165 fi 166 fi 167 SDL_CFLAGS="" 168 SDL_LIBS="" 169 ifelse([$3], , :, [$3]) 170 fi 171 AC_SUBST(SDL_CFLAGS) 172 AC_SUBST(SDL_LIBS) 173 rm -f conf.sdltest 174]) 175