Root/acinclude.m4

Source at commit 73ceffa51d3450d2d20ce933e7fc6da187e09fc8 created 8 years 5 months ago.
By Maarten ter Huurne, Fix bug in section directory creation method
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 1
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  if test x$sdl_exec_prefix != x ; then
25    sdl_config_args="$sdl_config_args --exec-prefix=$sdl_exec_prefix"
26    if test x${SDL_CONFIG+set} != xset ; then
27      SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
28    fi
29  fi
30  if test x$sdl_prefix != x ; then
31    sdl_config_args="$sdl_config_args --prefix=$sdl_prefix"
32    if test x${SDL_CONFIG+set} != xset ; then
33      SDL_CONFIG=$sdl_prefix/bin/sdl-config
34    fi
35  fi
36
37  as_save_PATH="$PATH"
38  if test "x$prefix" != xNONE; then
39    PATH="$prefix/bin:$prefix/usr/bin:$PATH"
40  fi
41  AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH])
42  PATH="$as_save_PATH"
43  min_sdl_version=ifelse([$1], ,0.11.0,$1)
44  AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
45  no_sdl=""
46  if test "$SDL_CONFIG" = "no" ; then
47    no_sdl=yes
48  else
49    SDL_CFLAGS=`$SDL_CONFIG $sdl_config_args --cflags`
50    SDL_LIBS=`$SDL_CONFIG $sdl_config_args --libs`
51
52    sdl_major_version=`$SDL_CONFIG $sdl_config_args --version | \
53           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
54    sdl_minor_version=`$SDL_CONFIG $sdl_config_args --version | \
55           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
56    sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
57           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
58    if test "x$enable_sdltest" = "xyes" ; then
59      ac_save_CFLAGS="$CFLAGS"
60      ac_save_CXXFLAGS="$CXXFLAGS"
61      ac_save_LIBS="$LIBS"
62      CFLAGS="$CFLAGS $SDL_CFLAGS"
63      CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
64      LIBS="$LIBS $SDL_LIBS"
65dnl
66dnl Now check if the installed SDL is sufficiently new. (Also sanity
67dnl checks the results of sdl-config to some extent
68dnl
69      rm -f conf.sdltest
70      AC_TRY_RUN([
71#include <stdio.h>
72#include <stdlib.h>
73#include <string.h>
74#include "SDL.h"
75
76char*
77my_strdup (char *str)
78{
79  char *new_str;
80  
81  if (str)
82    {
83      new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
84      strcpy (new_str, str);
85    }
86  else
87    new_str = NULL;
88  
89  return new_str;
90}
91
92int main (int argc, char *argv[])
93{
94  int major, minor, micro;
95  char *tmp_version;
96
97  /* This hangs on some systems (?)
98  system ("touch conf.sdltest");
99  */
100  { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
101
102  /* HP/UX 9 (%@#!) writes to sscanf strings */
103  tmp_version = my_strdup("$min_sdl_version");
104  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
105     printf("%s, bad version string\n", "$min_sdl_version");
106     exit(1);
107   }
108
109   if (($sdl_major_version > major) ||
110      (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
111      (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
112    {
113      return 0;
114    }
115  else
116    {
117      printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
118      printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
119      printf("*** best to upgrade to the required version.\n");
120      printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
121      printf("*** to point to the correct copy of sdl-config, and remove the file\n");
122      printf("*** config.cache before re-running configure\n");
123      return 1;
124    }
125}
126
127],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
128       CFLAGS="$ac_save_CFLAGS"
129       CXXFLAGS="$ac_save_CXXFLAGS"
130       LIBS="$ac_save_LIBS"
131     fi
132  fi
133  if test "x$no_sdl" = x ; then
134     AC_MSG_RESULT(yes)
135     ifelse([$2], , :, [$2])
136  else
137     AC_MSG_RESULT(no)
138     if test "$SDL_CONFIG" = "no" ; then
139       echo "*** The sdl-config script installed by SDL could not be found"
140       echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
141       echo "*** your path, or set the SDL_CONFIG environment variable to the"
142       echo "*** full path to sdl-config."
143     else
144       if test -f conf.sdltest ; then
145        :
146       else
147          echo "*** Could not run SDL test program, checking why..."
148          CFLAGS="$CFLAGS $SDL_CFLAGS"
149          CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
150          LIBS="$LIBS $SDL_LIBS"
151          AC_TRY_LINK([
152#include <stdio.h>
153#include "SDL.h"
154
155int main(int argc, char *argv[])
156{ return 0; }
157#undef main
158#define main K_and_R_C_main
159], [ return 0; ],
160        [ echo "*** The test program compiled, but did not run. This usually means"
161          echo "*** that the run-time linker is not finding SDL or finding the wrong"
162          echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
163          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
164          echo "*** to the installed location Also, make sure you have run ldconfig if that"
165          echo "*** is required on your system"
166      echo "***"
167          echo "*** If you have an old version installed, it is best to remove it, although"
168          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
169        [ echo "*** The test program failed to compile or link. See the file config.log for the"
170          echo "*** exact error that occured. This usually means SDL was incorrectly installed"
171          echo "*** or that you have moved SDL since it was installed. In the latter case, you"
172          echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
173          CFLAGS="$ac_save_CFLAGS"
174          CXXFLAGS="$ac_save_CXXFLAGS"
175          LIBS="$ac_save_LIBS"
176       fi
177     fi
178     SDL_CFLAGS=""
179     SDL_LIBS=""
180     ifelse([$3], , :, [$3])
181  fi
182  AC_SUBST(SDL_CFLAGS)
183  AC_SUBST(SDL_LIBS)
184  rm -f conf.sdltest
185])
186

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