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
8AC_DEFUN([AC_DEFINE_DIR], [
9  prefix_NONE=
10  exec_prefix_NONE=
11  test "x$prefix" = xNONE && prefix_NONE=yes &&
12prefix=$ac_default_prefix
13  test "x$exec_prefix" = xNONE && exec_prefix_NONE=yes &&
14exec_prefix=$prefix
15dnl In Autoconf 2.60, ${datadir} refers to ${datarootdir}, which in turn
16dnl refers to ${prefix}.  Thus we have to use `eval' twice.
17  eval ac_define_dir="\"[$]$2\""
18  eval ac_define_dir="\"$ac_define_dir\""
19  AC_SUBST($1, "$ac_define_dir")
20  AC_DEFINE_UNQUOTED($1, "$ac_define_dir", [$3])
21  test "$prefix_NONE" && prefix=NONE
22  test "$exec_prefix_NONE" && exec_prefix=NONE
23])
24
25dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
26dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
27dnl
28AC_DEFUN(AM_PATH_SDL,
29[dnl
30dnl Get the cflags and libraries from the sdl-config script
31dnl
32AC_ARG_WITH(sdl-prefix,[  --with-sdl-prefix=PFX   Prefix where SDL is installed (optional)],
33            sdl_prefix="$withval", sdl_prefix="")
34AC_ARG_WITH(sdl-exec-prefix,[  --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
35            sdl_exec_prefix="$withval", sdl_exec_prefix="")
36AC_ARG_ENABLE(sdltest, [  --disable-sdltest       Do not try to compile and run a test SDL program],
37		    , enable_sdltest=yes)
38
39  if test x$sdl_exec_prefix != x ; then
40     sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix"
41     if test x${SDL_CONFIG+set} != xset ; then
42        SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
43     fi
44  fi
45  if test x$sdl_prefix != x ; then
46     sdl_args="$sdl_args --prefix=$sdl_prefix"
47     if test x${SDL_CONFIG+set} != xset ; then
48        SDL_CONFIG=$sdl_prefix/bin/sdl-config
49     fi
50  fi
51
52  AC_PATH_PROG(SDL_CONFIG, sdl-config, no)
53  min_sdl_version=ifelse([$1], ,0.11.0,$1)
54  AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
55  no_sdl=""
56  if test "$SDL_CONFIG" = "no" ; then
57    no_sdl=yes
58  else
59    SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`
60    SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
61
62    sdl_major_version=`$SDL_CONFIG $sdl_args --version | \
63           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
64    sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \
65           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
66    sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
67           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
68    if test "x$enable_sdltest" = "xyes" ; then
69      ac_save_CFLAGS="$CFLAGS"
70      ac_save_LIBS="$LIBS"
71      CFLAGS="$CFLAGS $SDL_CFLAGS"
72      LIBS="$LIBS $SDL_LIBS"
73dnl
74dnl Now check if the installed SDL is sufficiently new. (Also sanity
75dnl checks the results of sdl-config to some extent
76dnl
77      rm -f conf.sdltest
78      AC_TRY_RUN([
79#include <stdio.h>
80#include <stdlib.h>
81#include <string.h>
82#include "SDL.h"
83
84char*
85my_strdup (char *str)
86{
87  char *new_str;
88
89  if (str)
90    {
91      new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
92      strcpy (new_str, str);
93    }
94  else
95    new_str = NULL;
96
97  return new_str;
98}
99
100int main (int argc, char *argv[])
101{
102  int major, minor, micro;
103  char *tmp_version;
104
105  /* This hangs on some systems (?)
106  system ("touch conf.sdltest");
107  */
108  { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
109
110  /* HP/UX 9 (%@#!) writes to sscanf strings */
111  tmp_version = my_strdup("$min_sdl_version");
112  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
113     printf("%s, bad version string\n", "$min_sdl_version");
114     exit(1);
115   }
116
117   if (($sdl_major_version > major) ||
118      (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
119      (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
120    {
121      return 0;
122    }
123  else
124    {
125      printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
126      printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
127      printf("*** best to upgrade to the required version.\n");
128      printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
129      printf("*** to point to the correct copy of sdl-config, and remove the file\n");
130      printf("*** config.cache before re-running configure\n");
131      return 1;
132    }
133}
134
135],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
136       CFLAGS="$ac_save_CFLAGS"
137       LIBS="$ac_save_LIBS"
138     fi
139  fi
140  if test "x$no_sdl" = x ; then
141     AC_MSG_RESULT(yes)
142     ifelse([$2], , :, [$2])
143  else
144     AC_MSG_RESULT(no)
145     if test "$SDL_CONFIG" = "no" ; then
146       echo "*** The sdl-config script installed by SDL could not be found"
147       echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
148       echo "*** your path, or set the SDL_CONFIG environment variable to the"
149       echo "*** full path to sdl-config."
150     else
151       if test -f conf.sdltest ; then
152        :
153       else
154          echo "*** Could not run SDL test program, checking why..."
155          CFLAGS="$CFLAGS $SDL_CFLAGS"
156          LIBS="$LIBS $SDL_LIBS"
157          AC_TRY_LINK([
158#include <stdio.h>
159#include "SDL.h"
160],      [ return 0; ],
161        [ echo "*** The test program compiled, but did not run. This usually means"
162          echo "*** that the run-time linker is not finding SDL or finding the wrong"
163          echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
164          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
165          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
166          echo "*** is required on your system"
167	  echo "***"
168          echo "*** If you have an old version installed, it is best to remove it, although"
169          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
170        [ echo "*** The test program failed to compile or link. See the file config.log for the"
171          echo "*** exact error that occured. This usually means SDL was incorrectly installed"
172          echo "*** or that you have moved SDL since it was installed. In the latter case, you"
173          echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
174          CFLAGS="$ac_save_CFLAGS"
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
187dnl Available from the GNU Autoconf Macro Archive at:
188dnl http://www.gnu.org/software/ac-archive/htmldoc/mdl_have_opengl.html
189dnl
190AC_DEFUN([MDL_HAVE_OPENGL],
191[
192  AC_REQUIRE([AC_PROG_CC])
193  AC_REQUIRE([AC_PATH_X])
194  AC_REQUIRE([AC_PATH_XTRA])
195
196  AC_CACHE_CHECK([for OpenGL], mdl_cv_have_OpenGL,
197  [
198dnl Don't check for Mesa first, vendor specific is usually more optimized
199dnl Check for Mesa first, unless we were asked not to.
200dnl    AC_ARG_WITH([--with-Mesa],
201dnl                   [Prefer the Mesa library over a vendors native OpenGL library (default=yes)],
202dnl                   with_Mesa_help_string)
203dnl    AC_ARG_ENABLE(Mesa, $with_Mesa_help_string, use_Mesa=$enableval, use_Mesa=yes)
204
205dnl    if test x"$use_Mesa" = xyes; then
206dnl       GL_search_list="MesaGL   GL"
207dnl      GLU_search_list="MesaGLU GLU"
208dnl     GLX_search_list="MesaGLX GLX"
209dnl    else
210       GL_search_list="GL  MesaGL"
211      GLU_search_list="GLU MesaGLU"
212      GLX_search_list="GLX MesaGLX"
213dnl    fi
214
215    AC_LANG_SAVE
216    AC_LANG_C
217
218dnl If we are running under X11 then add in the appropriate libraries.
219if test x"$no_x" != xyes; then
220dnl Add everything we need to compile and link X programs to GL_X_CFLAGS
221dnl and GL_X_LIBS.
222  GL_CFLAGS="$X_CFLAGS"
223  GL_X_LIBS="$X_PRE_LIBS $X_LIBS -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
224fi
225    GL_save_CPPFLAGS="$CPPFLAGS"
226    CPPFLAGS="$GL_CFLAGS"
227
228    GL_save_LIBS="$LIBS"
229    LIBS="$GL_X_LIBS"
230
231
232    # Save the "AC_MSG_RESULT file descriptor" to FD 8.
233    exec 8>&AC_FD_MSG
234
235    # Temporarily turn off AC_MSG_RESULT so that the user gets pretty
236    # messages.
237    exec AC_FD_MSG>/dev/null
238
239    AC_SEARCH_LIBS(glAccum,          $GL_search_list, have_GL=yes,   have_GL=no)
240    AC_SEARCH_LIBS(gluBeginCurve,   $GLU_search_list, have_GLU=yes,  have_GLU=no)
241    AC_SEARCH_LIBS(glXChooseVisual, $GLX_search_list, have_GLX=yes,  have_GLX=no)
242    AC_SEARCH_LIBS(glutInit,        glut,             have_glut=yes, have_glut=no)
243
244
245
246    # Restore pretty messages.
247    exec AC_FD_MSG>&8
248
249    if test -n "$LIBS"; then
250      mdl_cv_have_OpenGL=yes
251      GL_LIBS="$LIBS"
252      AC_SUBST(GL_CFLAGS)
253      AC_SUBST(GL_LIBS)
254    else
255      mdl_cv_have_OpenGL=no
256      GL_CFLAGS=
257    fi
258
259dnl Reset GL_X_LIBS regardless, since it was just a temporary variable
260dnl and we don't want to be global namespace polluters.
261    GL_X_LIBS=
262
263    LIBS="$GL_save_LIBS"
264    CPPFLAGS="$GL_save_CPPFLAGS"
265
266    AC_LANG_RESTORE
267
268dnl bugfix: dont forget to cache this variables, too
269    mdl_cv_GL_CFLAGS="$GL_CFLAGS"
270    mdl_cv_GL_LIBS="$GL_LIBS"
271    mdl_cv_have_GL="$have_GL"
272    mdl_cv_have_GLU="$have_GLU"
273    mdl_cv_have_GLX="$have_GLX"
274    mdl_cv_have_glut="$have_glut"
275  ])
276  GL_CFLAGS="$mdl_cv_GL_CFLAGS"
277  GL_LIBS="$mdl_cv_GL_LIBS"
278  have_GL="$mdl_cv_have_GL"
279  have_GLU="$mdl_cv_have_GLU"
280  have_GLX="$mdl_cv_have_GLX"
281  have_glut="$mdl_cv_have_glut"
282])
283dnl endof bugfix -ainan
284