1 # Configure paths for SDL
3 # stolen from Manish Singh
4 # stolen back from Frank Belew
5 # stolen from Manish Singh
6 # Shamelessly stolen from Owen Taylor
10 dnl AM_PATH_SDL2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
11 dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
13 AC_DEFUN([AM_PATH_SDL2],
15 dnl Get the cflags and libraries from the sdl2-config script
17 AC_ARG_WITH(sdl-prefix,[ --with-sdl-prefix=PFX Prefix where SDL is installed (optional)],
18 sdl_prefix="$withval", sdl_prefix="")
19 AC_ARG_WITH(sdl-exec-prefix,[ --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
20 sdl_exec_prefix="$withval", sdl_exec_prefix="")
21 AC_ARG_ENABLE(sdltest, [ --disable-sdltest Do not try to compile and run a test SDL program],
24 min_sdl_version=ifelse([$1], ,2.0.0,$1)
26 if test "x$sdl_prefix$sdl_exec_prefix" = x ; then
27 PKG_CHECK_MODULES([SDL], [sdl2 >= $min_sdl_version],
32 if test x$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
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=$sdl_prefix/bin/sdl2-config
46 if test "x$sdl_pc" = xyes ; then
48 SDL2_CONFIG="pkg-config sdl2"
51 if test "x$prefix" != xNONE && test "$cross_compiling" != yes; then
52 PATH="$prefix/bin:$prefix/usr/bin:$PATH"
54 AC_PATH_PROG(SDL2_CONFIG, sdl2-config, no, [$PATH])
56 AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
59 if test "$SDL2_CONFIG" = "no" ; then
62 SDL_CFLAGS=`$SDL2_CONFIG $sdl_config_args --cflags`
63 SDL_LIBS=`$SDL2_CONFIG $sdl_config_args --libs`
65 sdl_major_version=`$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="$CXXFLAGS"
75 CFLAGS="$CFLAGS $SDL_CFLAGS"
76 CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
77 LIBS="$LIBS $SDL_LIBS"
79 dnl Now check if the installed SDL is sufficiently new. (Also sanity
80 dnl checks the results of sdl2-config to some extent
96 new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
97 strcpy (new_str, str);
105 int main (int argc, char *argv[])
107 int major, minor, micro;
110 /* This hangs on some systems (?)
111 system ("touch conf.sdltest");
113 { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
115 /* HP/UX 9 (%@#!) writes to sscanf strings */
116 tmp_version = my_strdup("$min_sdl_version");
117 if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, µ) != 3) {
118 printf("%s, bad version string\n", "$min_sdl_version");
122 if (($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)))
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");
140 ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
141 CFLAGS="$ac_save_CFLAGS"
142 CXXFLAGS="$ac_save_CXXFLAGS"
146 if test "x$no_sdl" = x ; then
152 if test "x$no_sdl" = x ; then
153 ifelse([$2], , :, [$2])
155 if test "$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."
161 if test -f conf.sdltest ; then
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"
172 int main(int argc, char *argv[])
175 #define main K_and_R_C_main
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"
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"
197 ifelse([$3], , :, [$3])