sdl2.m4 (6982B)
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 8# serial 1 9 10dnl AM_PATH_SDL2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]]) 11dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS 12dnl 13AC_DEFUN([AM_PATH_SDL2], 14[dnl 15dnl Get the cflags and libraries from the sdl2-config script 16dnl 17AC_ARG_WITH(sdl-prefix,[ --with-sdl-prefix=PFX Prefix where SDL is installed (optional)], 18 sdl_prefix="$withval", sdl_prefix="") 19AC_ARG_WITH(sdl-exec-prefix,[ --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)], 20 sdl_exec_prefix="$withval", sdl_exec_prefix="") 21AC_ARG_ENABLE(sdltest, [ --disable-sdltest Do not try to compile and run a test SDL program], 22 , enable_sdltest=yes) 23 24 min_sdl_version=ifelse([$1], ,2.0.0,$1) 25 26 if test "x$sdl_prefix$sdl_exec_prefix" = x ; then 27 PKG_CHECK_MODULES([SDL], [sdl2 >= $min_sdl_version], 28 [sdl_pc=yes], 29 [sdl_pc=no]) 30 else 31 sdl_pc=no 32 if test x$sdl_exec_prefix != x ; then 33 sdl_config_args="$sdl_config_args --exec-prefix=$sdl_exec_prefix" 34 if test x${SDL2_CONFIG+set} != xset ; then 35 SDL2_CONFIG=$sdl_exec_prefix/bin/sdl2-config 36 fi 37 fi 38 if test x$sdl_prefix != x ; then 39 sdl_config_args="$sdl_config_args --prefix=$sdl_prefix" 40 if test x${SDL2_CONFIG+set} != xset ; then 41 SDL2_CONFIG=$sdl_prefix/bin/sdl2-config 42 fi 43 fi 44 fi 45 46 if test "x$sdl_pc" = xyes ; then 47 no_sdl="" 48 SDL2_CONFIG="pkg-config sdl2" 49 else 50 as_save_PATH="$PATH" 51 if test "x$prefix" != xNONE && test "$cross_compiling" != yes; then 52 PATH="$prefix/bin:$prefix/usr/bin:$PATH" 53 fi 54 AC_PATH_PROG(SDL2_CONFIG, sdl2-config, no, [$PATH]) 55 PATH="$as_save_PATH" 56 AC_MSG_CHECKING(for SDL - version >= $min_sdl_version) 57 no_sdl="" 58 59 if test "$SDL2_CONFIG" = "no" ; then 60 no_sdl=yes 61 else 62 SDL_CFLAGS=`$SDL2_CONFIG $sdl_config_args --cflags` 63 SDL_LIBS=`$SDL2_CONFIG $sdl_config_args --libs` 64 65 sdl_major_version=`$SDL2_CONFIG $sdl_config_args --version | \ 66 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'` 67 sdl_minor_version=`$SDL2_CONFIG $sdl_config_args --version | \ 68 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'` 69 sdl_micro_version=`$SDL2_CONFIG $sdl_config_args --version | \ 70 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'` 71 if test "x$enable_sdltest" = "xyes" ; then 72 ac_save_CFLAGS="$CFLAGS" 73 ac_save_CXXFLAGS="$CXXFLAGS" 74 ac_save_LIBS="$LIBS" 75 CFLAGS="$CFLAGS $SDL_CFLAGS" 76 CXXFLAGS="$CXXFLAGS $SDL_CFLAGS" 77 LIBS="$LIBS $SDL_LIBS" 78dnl 79dnl Now check if the installed SDL is sufficiently new. (Also sanity 80dnl checks the results of sdl2-config to some extent 81dnl 82 rm -f conf.sdltest 83 AC_TRY_RUN([ 84#include <stdio.h> 85#include <stdlib.h> 86#include <string.h> 87#include "SDL.h" 88 89char* 90my_strdup (char *str) 91{ 92 char *new_str; 93 94 if (str) 95 { 96 new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char)); 97 strcpy (new_str, str); 98 } 99 else 100 new_str = NULL; 101 102 return new_str; 103} 104 105int main (int argc, char *argv[]) 106{ 107 int major, minor, micro; 108 char *tmp_version; 109 110 /* This hangs on some systems (?) 111 system ("touch conf.sdltest"); 112 */ 113 { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); } 114 115 /* HP/UX 9 (%@#!) writes to sscanf strings */ 116 tmp_version = my_strdup("$min_sdl_version"); 117 if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, µ) != 3) { 118 printf("%s, bad version string\n", "$min_sdl_version"); 119 exit(1); 120 } 121 122 if (($sdl_major_version > major) || 123 (($sdl_major_version == major) && ($sdl_minor_version > minor)) || 124 (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro))) 125 { 126 return 0; 127 } 128 else 129 { 130 printf("\n*** 'sdl2-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version); 131 printf("*** of SDL required is %d.%d.%d. If sdl2-config is correct, then it is\n", major, minor, micro); 132 printf("*** best to upgrade to the required version.\n"); 133 printf("*** If sdl2-config was wrong, set the environment variable SDL2_CONFIG\n"); 134 printf("*** to point to the correct copy of sdl2-config, and remove the file\n"); 135 printf("*** config.cache before re-running configure\n"); 136 return 1; 137 } 138} 139 140],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"]) 141 CFLAGS="$ac_save_CFLAGS" 142 CXXFLAGS="$ac_save_CXXFLAGS" 143 LIBS="$ac_save_LIBS" 144 fi 145 fi 146 if test "x$no_sdl" = x ; then 147 AC_MSG_RESULT(yes) 148 else 149 AC_MSG_RESULT(no) 150 fi 151 fi 152 if test "x$no_sdl" = x ; then 153 ifelse([$2], , :, [$2]) 154 else 155 if test "$SDL2_CONFIG" = "no" ; then 156 echo "*** The sdl2-config script installed by SDL could not be found" 157 echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in" 158 echo "*** your path, or set the SDL2_CONFIG environment variable to the" 159 echo "*** full path to sdl2-config." 160 else 161 if test -f conf.sdltest ; then 162 : 163 else 164 echo "*** Could not run SDL test program, checking why..." 165 CFLAGS="$CFLAGS $SDL_CFLAGS" 166 CXXFLAGS="$CXXFLAGS $SDL_CFLAGS" 167 LIBS="$LIBS $SDL_LIBS" 168 AC_TRY_LINK([ 169#include <stdio.h> 170#include "SDL.h" 171 172int main(int argc, char *argv[]) 173{ return 0; } 174#undef main 175#define main K_and_R_C_main 176], [ return 0; ], 177 [ echo "*** The test program compiled, but did not run. This usually means" 178 echo "*** that the run-time linker is not finding SDL or finding the wrong" 179 echo "*** version of SDL. If it is not finding SDL, you'll need to set your" 180 echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point" 181 echo "*** to the installed location Also, make sure you have run ldconfig if that" 182 echo "*** is required on your system" 183 echo "***" 184 echo "*** If you have an old version installed, it is best to remove it, although" 185 echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"], 186 [ echo "*** The test program failed to compile or link. See the file config.log for the" 187 echo "*** exact error that occured. This usually means SDL was incorrectly installed" 188 echo "*** or that you have moved SDL since it was installed. In the latter case, you" 189 echo "*** may want to edit the sdl2-config script: $SDL2_CONFIG" ]) 190 CFLAGS="$ac_save_CFLAGS" 191 CXXFLAGS="$ac_save_CXXFLAGS" 192 LIBS="$ac_save_LIBS" 193 fi 194 fi 195 SDL_CFLAGS="" 196 SDL_LIBS="" 197 ifelse([$3], , :, [$3]) 198 fi 199 AC_SUBST(SDL_CFLAGS) 200 AC_SUBST(SDL_LIBS) 201 rm -f conf.sdltest 202])