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source: downloads/Scripts/m4/sdl.m4 @ 6

Last change on this file since 6 was 5, checked in by anonymous, 17 years ago

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