sdl.m4
author Sam Lantinga <slouken@libsdl.org>
Thu, 12 Jul 2007 05:32:07 +0000
changeset 2177 4f896c20caf6
parent 1755 91063c450171
child 2288 e9bcf004c324
permissions -rw-r--r--
Added note about SDL_config.h - merged from revision 3227 on SDL 1.2 branch
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# Configure paths for SDL
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# Sam Lantinga 9/21/99
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# stolen from Manish Singh
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# stolen back from Frank Belew
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# stolen from Manish Singh
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# Shamelessly stolen from Owen Taylor
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dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
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dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
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dnl
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AC_DEFUN([AM_PATH_SDL],
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[dnl 
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dnl Get the cflags and libraries from the sdl-config script
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dnl
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AC_ARG_WITH(sdl-prefix,[  --with-sdl-prefix=PFX   Prefix where SDL is installed (optional)],
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            sdl_prefix="$withval", sdl_prefix="")
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AC_ARG_WITH(sdl-exec-prefix,[  --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
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            sdl_exec_prefix="$withval", sdl_exec_prefix="")
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AC_ARG_ENABLE(sdltest, [  --disable-sdltest       Do not try to compile and run a test SDL program],
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		    , enable_sdltest=yes)
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  if test x$sdl_exec_prefix != x ; then
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    sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix"
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    if test x${SDL_CONFIG+set} != xset ; then
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      SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
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    fi
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  fi
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  if test x$sdl_prefix != x ; then
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    sdl_args="$sdl_args --prefix=$sdl_prefix"
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    if test x${SDL_CONFIG+set} != xset ; then
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      SDL_CONFIG=$sdl_prefix/bin/sdl-config
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    fi
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  fi
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  if test "x$prefix" != xNONE; then
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    PATH="$prefix/bin:$prefix/usr/bin:$PATH"
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  fi
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  AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH])
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  min_sdl_version=ifelse([$1], ,0.11.0,$1)
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  AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
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  no_sdl=""
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  if test "$SDL_CONFIG" = "no" ; then
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    no_sdl=yes
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  else
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    SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`
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    SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
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    sdl_major_version=`$SDL_CONFIG $sdl_args --version | \
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           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
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    sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \
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           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
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    sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
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           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
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    if test "x$enable_sdltest" = "xyes" ; then
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      ac_save_CFLAGS="$CFLAGS"
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      ac_save_CXXFLAGS="$CXXFLAGS"
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      ac_save_LIBS="$LIBS"
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      CFLAGS="$CFLAGS $SDL_CFLAGS"
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      CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
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      LIBS="$LIBS $SDL_LIBS"
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dnl
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dnl Now check if the installed SDL is sufficiently new. (Also sanity
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dnl checks the results of sdl-config to some extent
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dnl
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      rm -f conf.sdltest
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      AC_TRY_RUN([
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "SDL.h"
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char*
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my_strdup (char *str)
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{
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  char *new_str;
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  if (str)
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    {
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      new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
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      strcpy (new_str, str);
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    }
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  else
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    new_str = NULL;
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  return new_str;
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}
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int main (int argc, char *argv[])
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{
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  int major, minor, micro;
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  char *tmp_version;
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  /* This hangs on some systems (?)
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  system ("touch conf.sdltest");
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  */
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  { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
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  /* HP/UX 9 (%@#!) writes to sscanf strings */
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  tmp_version = my_strdup("$min_sdl_version");
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  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
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     printf("%s, bad version string\n", "$min_sdl_version");
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     exit(1);
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   }
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   if (($sdl_major_version > major) ||
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      (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
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      (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
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    {
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      return 0;
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    }
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  else
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    {
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      printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
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      printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
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      printf("*** best to upgrade to the required version.\n");
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      printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
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      printf("*** to point to the correct copy of sdl-config, and remove the file\n");
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      printf("*** config.cache before re-running configure\n");
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      return 1;
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    }
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}
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],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
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       CFLAGS="$ac_save_CFLAGS"
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       CXXFLAGS="$ac_save_CXXFLAGS"
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       LIBS="$ac_save_LIBS"
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     fi
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  fi
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  if test "x$no_sdl" = x ; then
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     AC_MSG_RESULT(yes)
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     ifelse([$2], , :, [$2])     
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  else
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     AC_MSG_RESULT(no)
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     if test "$SDL_CONFIG" = "no" ; then
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       echo "*** The sdl-config script installed by SDL could not be found"
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       echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
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       echo "*** your path, or set the SDL_CONFIG environment variable to the"
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       echo "*** full path to sdl-config."
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     else
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       if test -f conf.sdltest ; then
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        :
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       else
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          echo "*** Could not run SDL test program, checking why..."
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          CFLAGS="$CFLAGS $SDL_CFLAGS"
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          CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
0
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          LIBS="$LIBS $SDL_LIBS"
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          AC_TRY_LINK([
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#include <stdio.h>
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#include "SDL.h"
1
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int main(int argc, char *argv[])
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{ return 0; }
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#undef  main
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#define main K_and_R_C_main
0
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],      [ return 0; ],
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        [ echo "*** The test program compiled, but did not run. This usually means"
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          echo "*** that the run-time linker is not finding SDL or finding the wrong"
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          echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
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          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
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          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
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          echo "*** is required on your system"
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	  echo "***"
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          echo "*** If you have an old version installed, it is best to remove it, although"
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          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
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        [ echo "*** The test program failed to compile or link. See the file config.log for the"
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          echo "*** exact error that occured. This usually means SDL was incorrectly installed"
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          echo "*** or that you have moved SDL since it was installed. In the latter case, you"
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          echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
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          CFLAGS="$ac_save_CFLAGS"
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          CXXFLAGS="$ac_save_CXXFLAGS"
0
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          LIBS="$ac_save_LIBS"
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       fi
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     fi
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     SDL_CFLAGS=""
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     SDL_LIBS=""
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     ifelse([$3], , :, [$3])
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  fi
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  AC_SUBST(SDL_CFLAGS)
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  AC_SUBST(SDL_LIBS)
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  rm -f conf.sdltest
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])