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 2
9
10dnl AM_PATH_SDL([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_SDL],
14[dnl
15dnl Get the cflags and libraries from the sdl-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], ,1.2.0,$1)
25
26  if test "x$sdl_prefix$sdl_exec_prefix" = x ; then
27    PKG_CHECK_MODULES([SDL], [sdl >= $min_sdl_version],
28           [sdl_pc=yes],
29           [sdl_pc=no])
30  else
31    sdl_pc=no
32    if test x$sdl_exec_prefix != x ; then
33      sdl_config_args="$sdl_config_args --exec-prefix=$sdl_exec_prefix"
34      if test x${SDL_CONFIG+set} != xset ; then
35        SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
36      fi
37    fi
38    if test x$sdl_prefix != x ; then
39      sdl_config_args="$sdl_config_args --prefix=$sdl_prefix"
40      if test x${SDL_CONFIG+set} != xset ; then
41        SDL_CONFIG=$sdl_prefix/bin/sdl-config
42      fi
43    fi
44  fi
45
46  if test "x$sdl_pc" = xyes ; then
47    no_sdl=""
48    SDL_CONFIG="pkg-config sdl"
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(SDL_CONFIG, sdl-config, no, [$PATH])
55    PATH="$as_save_PATH"
56    AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
57    no_sdl=""
58
59    if test "$SDL_CONFIG" = "no" ; then
60      no_sdl=yes
61    else
62      SDL_CFLAGS=`$SDL_CONFIG $sdl_config_args --cflags`
63      SDL_LIBS=`$SDL_CONFIG $sdl_config_args --libs`
64
65      sdl_major_version=`$SDL_CONFIG $sdl_config_args --version | \
66             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
67      sdl_minor_version=`$SDL_CONFIG $sdl_config_args --version | \
68             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
69      sdl_micro_version=`$SDL_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 $SDL_LIBS"
78dnl
79dnl Now check if the installed SDL is sufficiently new. (Also sanity
80dnl checks the results of sdl-config to some extent
81dnl
82      rm -f conf.sdltest
83      AC_RUN_IFELSE([AC_LANG_SOURCE([[
84#include <stdio.h>
85#include <stdlib.h>
86#include "SDL.h"
87
88int main (int argc, char *argv[])
89{
90  int major, minor, micro;
91  FILE *fp = fopen("conf.sdltest", "w");
92
93  if (fp) fclose(fp);
94
95  if (sscanf("$min_sdl_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        CXXFLAGS="$ac_save_CXXFLAGS"
121        LIBS="$ac_save_LIBS"
122      fi
123    fi
124    if test "x$no_sdl" = x ; then
125      AC_MSG_RESULT(yes)
126    else
127      AC_MSG_RESULT(no)
128    fi
129  fi
130  if test "x$no_sdl" = x ; then
131     ifelse([$2], , :, [$2])
132  else
133     if test "$SDL_CONFIG" = "no" ; then
134       echo "*** The sdl-config script installed by SDL could not be found"
135       echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
136       echo "*** your path, or set the SDL_CONFIG environment variable to the"
137       echo "*** full path to sdl-config."
138     else
139       if test -f conf.sdltest ; then
140        :
141       else
142          echo "*** Could not run SDL test program, checking why..."
143          CFLAGS="$CFLAGS $SDL_CFLAGS"
144          CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
145          LIBS="$LIBS $SDL_LIBS"
146          AC_LINK_IFELSE([AC_LANG_PROGRAM([[
147#include <stdio.h>
148#include "SDL.h"
149
150int main(int argc, char *argv[])
151{ return 0; }
152#undef  main
153#define main K_and_R_C_main
154]], [[ return 0; ]])],
155        [ echo "*** The test program compiled, but did not run. This usually means"
156          echo "*** that the run-time linker is not finding SDL or finding the wrong"
157          echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
158          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
159          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
160          echo "*** is required on your system"
161	  echo "***"
162          echo "*** If you have an old version installed, it is best to remove it, although"
163          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
164        [ 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="$ac_save_CXXFLAGS"
170          LIBS="$ac_save_LIBS"
171       fi
172     fi
173     SDL_CFLAGS=""
174     SDL_LIBS=""
175     ifelse([$3], , :, [$3])
176  fi
177  AC_SUBST(SDL_CFLAGS)
178  AC_SUBST(SDL_LIBS)
179  rm -f conf.sdltest
180])
181