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 if test "x$prefix" != xNONE; then 36 PATH="$prefix/bin:$prefix/usr/bin:$PATH" 37 fi 38 AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH]) 39 min_sdl_version=ifelse([$1], ,0.11.0,$1) 40 AC_MSG_CHECKING(for SDL - version >= $min_sdl_version) 41 no_sdl="" 42 if test "$SDL_CONFIG" = "no" ; then 43 no_sdl=yes 44 else 45 SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags` 46 SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs` 47 48 sdl_major_version=`$SDL_CONFIG $sdl_args --version | \ 49 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'` 50 sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \ 51 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'` 52 sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \ 53 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'` 54 if test "x$enable_sdltest" = "xyes" ; then 55 ac_save_CFLAGS="$CFLAGS" 56 ac_save_CXXFLAGS="$CXXFLAGS" 57 ac_save_LIBS="$LIBS" 58 CFLAGS="$CFLAGS $SDL_CFLAGS" 59 CXXFLAGS="$CXXFLAGS $SDL_CFLAGS" 60 LIBS="$LIBS $SDL_LIBS" 61dnl 62dnl Now check if the installed SDL is sufficiently new. (Also sanity 63dnl checks the results of sdl-config to some extent 64dnl 65 rm -f conf.sdltest 66 AC_TRY_RUN([ 67#include <stdio.h> 68#include <stdlib.h> 69#include <string.h> 70#include "SDL.h" 71 72char* 73my_strdup (char *str) 74{ 75 char *new_str; 76 77 if (str) 78 { 79 new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char)); 80 strcpy (new_str, str); 81 } 82 else 83 new_str = NULL; 84 85 return new_str; 86} 87 88int main (int argc, char *argv[]) 89{ 90 int major, minor, micro; 91 char *tmp_version; 92 93 /* This hangs on some systems (?) 94 system ("touch conf.sdltest"); 95 */ 96 { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); } 97 98 /* HP/UX 9 (%@#!) writes to sscanf strings */ 99 tmp_version = my_strdup("$min_sdl_version"); 100 if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, µ) != 3) { 101 printf("%s, bad version string\n", "$min_sdl_version"); 102 exit(1); 103 } 104 105 if (($sdl_major_version > major) || 106 (($sdl_major_version == major) && ($sdl_minor_version > minor)) || 107 (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro))) 108 { 109 return 0; 110 } 111 else 112 { 113 printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version); 114 printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro); 115 printf("*** best to upgrade to the required version.\n"); 116 printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n"); 117 printf("*** to point to the correct copy of sdl-config, and remove the file\n"); 118 printf("*** config.cache before re-running configure\n"); 119 return 1; 120 } 121} 122 123],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"]) 124 CFLAGS="$ac_save_CFLAGS" 125 CXXFLAGS="$ac_save_CXXFLAGS" 126 LIBS="$ac_save_LIBS" 127 fi 128 fi 129 if test "x$no_sdl" = x ; then 130 AC_MSG_RESULT(yes) 131 ifelse([$2], , :, [$2]) 132 else 133 AC_MSG_RESULT(no) 134 if test "$SDL_CONFIG" = "no" ; then 135 echo "*** The sdl-config script installed by SDL could not be found" 136 echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in" 137 echo "*** your path, or set the SDL_CONFIG environment variable to the" 138 echo "*** full path to sdl-config." 139 else 140 if test -f conf.sdltest ; then 141 : 142 else 143 echo "*** Could not run SDL test program, checking why..." 144 CFLAGS="$CFLAGS $SDL_CFLAGS" 145 CXXFLAGS="$CXXFLAGS $SDL_CFLAGS" 146 LIBS="$LIBS $SDL_LIBS" 147 AC_TRY_LINK([ 148#include <stdio.h> 149#include "SDL.h" 150 151int main(int argc, char *argv[]) 152{ return 0; } 153#undef main 154#define main K_and_R_C_main 155], [ return 0; ], 156 [ echo "*** The test program compiled, but did not run. This usually means" 157 echo "*** that the run-time linker is not finding SDL or finding the wrong" 158 echo "*** version of SDL. If it is not finding SDL, you'll need to set your" 159 echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point" 160 echo "*** to the installed location Also, make sure you have run ldconfig if that" 161 echo "*** is required on your system" 162 echo "***" 163 echo "*** If you have an old version installed, it is best to remove it, although" 164 echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"], 165 [ echo "*** The test program failed to compile or link. See the file config.log for the" 166 echo "*** exact error that occured. This usually means SDL was incorrectly installed" 167 echo "*** or that you have moved SDL since it was installed. In the latter case, you" 168 echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ]) 169 CFLAGS="$ac_save_CFLAGS" 170 CXXFLAGS="$ac_save_CXXFLAGS" 171 LIBS="$ac_save_LIBS" 172 fi 173 fi 174 SDL_CFLAGS="" 175 SDL_LIBS="" 176 ifelse([$3], , :, [$3]) 177 fi 178 AC_SUBST(SDL_CFLAGS) 179 AC_SUBST(SDL_LIBS) 180 rm -f conf.sdltest 181]) 182