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
7 # Taken to Freeciv from SDL release 1.2.12
9 dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
10 dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
12 AC_DEFUN([AM_PATH_SDL],
14 dnl Get the cflags and libraries from the sdl-config script
16 AC_ARG_WITH(sdl-prefix,[ --with-sdl-prefix=PFX Prefix where SDL is installed (optional)],
17 sdl_prefix="$withval", sdl_prefix="")
18 AC_ARG_WITH(sdl-exec-prefix,[ --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
19 sdl_exec_prefix="$withval", sdl_exec_prefix="")
20 AC_ARG_ENABLE(sdltest, [ --disable-sdltest Do not try to compile and run a test SDL program],
23 if test x$sdl_exec_prefix != x ; then
24 sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix"
25 if test x${SDL_CONFIG+set} != xset ; then
26 SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
29 if test x$sdl_prefix != x ; then
30 sdl_args="$sdl_args --prefix=$sdl_prefix"
31 if test x${SDL_CONFIG+set} != xset ; then
32 SDL_CONFIG=$sdl_prefix/bin/sdl-config
36 if test "x$prefix" != xNONE; then
37 PATH="$prefix/bin:$prefix/usr/bin:$PATH"
39 AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH])
40 min_sdl_version=ifelse([$1], ,0.11.0,$1)
41 AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
43 if test "$SDL_CONFIG" = "no" ; then
46 SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`
47 SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
49 sdl_major_version=`$SDL_CONFIG $sdl_args --version | \
50 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
51 sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \
52 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
53 sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
54 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
55 if test "x$enable_sdltest" = "xyes" ; then
56 ac_save_CFLAGS="$CFLAGS"
57 ac_save_CXXFLAGS="$CXXFLAGS"
59 CFLAGS="$CFLAGS $SDL_CFLAGS"
60 CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
61 LIBS="$LIBS $SDL_LIBS"
63 dnl Now check if the installed SDL is sufficiently new. (Also sanity
64 dnl checks the results of sdl-config to some extent
67 AC_RUN_IFELSE([AC_LANG_SOURCE([[
80 new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
81 strcpy (new_str, str);
89 int main (int argc, char *argv[])
91 int major, minor, micro;
94 /* This hangs on some systems (?)
95 system ("touch conf.sdltest");
97 { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
99 /* HP/UX 9 (%@#!) writes to sscanf strings */
100 tmp_version = my_strdup("$min_sdl_version");
101 if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, µ) != 3) {
102 printf("%s, bad version string\n", "$min_sdl_version");
106 if (($sdl_major_version > major) ||
107 (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
108 (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
114 printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
115 printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
116 printf("*** best to upgrade to the required version.\n");
117 printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
118 printf("*** to point to the correct copy of sdl-config, and remove the file\n");
119 printf("*** config.cache before re-running configure\n");
124 ]])],[],[no_sdl=yes],[echo $ac_n "cross compiling; assumed OK... $ac_c"])
125 CFLAGS="$ac_save_CFLAGS"
126 CXXFLAGS="$ac_save_CXXFLAGS"
130 if test "x$no_sdl" = x ; then
132 ifelse([$2], , :, [$2])
135 if test "$SDL_CONFIG" = "no" ; then
136 echo "*** The sdl-config script installed by SDL could not be found"
137 echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
138 echo "*** your path, or set the SDL_CONFIG environment variable to the"
139 echo "*** full path to sdl-config."
141 if test -f conf.sdltest ; then
144 echo "*** Could not run SDL test program, checking why..."
145 CFLAGS="$CFLAGS $SDL_CFLAGS"
146 CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
147 LIBS="$LIBS $SDL_LIBS"
148 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
152 int main(int argc, char *argv[])
155 #define main K_and_R_C_main
156 ]], [[ return 0; ]])],[ 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"
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"],[ echo "*** The test program failed to compile or link. See the file config.log for the"
165 echo "*** exact error that occured. This usually means SDL was incorrectly installed"
166 echo "*** or that you have moved SDL since it was installed. In the latter case, you"
167 echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
168 CFLAGS="$ac_save_CFLAGS"
169 CXXFLAGS="$ac_save_CXXFLAGS"
175 ifelse([$3], , :, [$3])