Root/acinclude.m4

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

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