acinclude.m4

# Configure paths for SDL
# Sam Lantinga 9/21/99
# stolen from Manish Singh
# stolen back from Frank Belew
# stolen from Manish Singh
# Shamelessly stolen from Owen Taylor
#
# Changelog:
# * also look for SDL2.framework under Mac OS X

# serial 1

dnl AM_PATH_SDL2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
dnl
AC_DEFUN([AM_PATH_SDL2],
[dnl 
dnl Get the cflags and libraries from the sdl2-config script
dnl
AC_ARG_WITH(sdl-prefix,
	[AS_HELP_STRING([--with-sdl-prefix=PFX], [Prefix where SDL is installed (optional)])],
	sdl_prefix="$withval",
	sdl_prefix="")
AC_ARG_WITH(sdl-exec-prefix,
	[AS_HELP_STRING([--with-sdl-exec-prefix=PFX], [Exec prefix where SDL is installed (optional)])],
	sdl_exec_prefix="$withval",
	sdl_exec_prefix="")
AC_ARG_ENABLE(sdltest,
	[AS_HELP_STRING([--disable-sdltest], [Do not try to compile and run a test SDL program])],
	,
	enable_sdltest=yes)
AC_ARG_ENABLE(sdlframework,
	[AS_HELP_STRING([--disable-sdlframework], [Do not search for SDL2.framework])],
	,
	search_sdl_framework=yes)

AC_ARG_VAR(SDL2_FRAMEWORK, [Path to SDL2.framework])

  min_sdl_version=ifelse([$1], ,2.0.0,$1)

  if test "x$sdl_prefix$sdl_exec_prefix" = x ; then
    PKG_CHECK_MODULES([SDL], [sdl2 >= $min_sdl_version],
           [sdl_pc=yes],
           [sdl_pc=no])
  else
    sdl_pc=no
    if test x$sdl_exec_prefix != x ; then
      sdl_config_args="$sdl_config_args --exec-prefix=$sdl_exec_prefix"
      if test x${SDL2_CONFIG+set} != xset ; then
        SDL2_CONFIG=$sdl_exec_prefix/bin/sdl2-config
      fi
    fi
    if test x$sdl_prefix != x ; then
      sdl_config_args="$sdl_config_args --prefix=$sdl_prefix"
      if test x${SDL2_CONFIG+set} != xset ; then
        SDL2_CONFIG=$sdl_prefix/bin/sdl2-config
      fi
    fi
  fi

  if test "x$sdl_pc" = xyes ; then
    no_sdl=""
    SDL2_CONFIG="pkg-config sdl2"
  else
    as_save_PATH="$PATH"
    if test "x$prefix" != xNONE && test "$cross_compiling" != yes; then
      PATH="$prefix/bin:$prefix/usr/bin:$PATH"
    fi
    AC_PATH_PROG(SDL2_CONFIG, sdl2-config, no, [$PATH])
    PATH="$as_save_PATH"
    no_sdl=""

    if test "$SDL2_CONFIG" = "no" -a "x$search_sdl_framework" = "xyes"; then
      AC_MSG_CHECKING(for SDL2.framework)
      if test "x$SDL2_FRAMEWORK" != x; then
        sdl_framework=$SDL2_FRAMEWORK
      else
        for d in / ~/ /System/; do
          if test -d "$dLibrary/Frameworks/SDL2.framework"; then
            sdl_framework="$dLibrary/Frameworks/SDL2.framework"
          fi
        done
      fi

      if test x"$sdl_framework" != x && test -d "$sdl_framework"; then
        AC_MSG_RESULT($sdl_framework)
        sdl_framework_dir=`dirname $sdl_framework`
        SDL_CFLAGS="-F$sdl_framework_dir -Wl,-framework,SDL2 -I$sdl_framework/include"
        SDL_LIBS="-F$sdl_framework_dir -Wl,-framework,SDL2"
      else
        no_sdl=yes
      fi
    fi

    if test "$SDL2_CONFIG" != "no"; then
      if test "x$sdl_pc" = "xno"; then
        AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
        SDL_CFLAGS=`$SDL2_CONFIG $sdl_config_args --cflags`
        SDL_LIBS=`$SDL2_CONFIG $sdl_config_args --libs`
      fi

      sdl_major_version=`$SDL2_CONFIG $sdl_config_args --version | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
      sdl_minor_version=`$SDL2_CONFIG $sdl_config_args --version | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
      sdl_micro_version=`$SDL2_CONFIG $sdl_config_args --version | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
      if test "x$enable_sdltest" = "xyes" ; then
        ac_save_CFLAGS="$CFLAGS"
        ac_save_CXXFLAGS="$CXXFLAGS"
        ac_save_LIBS="$LIBS"
        CFLAGS="$CFLAGS $SDL_CFLAGS"
        CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
        LIBS="$LIBS $SDL_LIBS"
dnl
dnl Now check if the installed SDL is sufficiently new. (Also sanity
dnl checks the results of sdl2-config to some extent
dnl
      rm -f conf.sdltest
      AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "SDL.h"

char*
my_strdup (char *str)
{
  char *new_str;
  
  if (str)
    {
      new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
      strcpy (new_str, str);
    }
  else
    new_str = NULL;
  
  return new_str;
}

int main (int argc, char *argv[])
{
  int major, minor, micro;
  char *tmp_version;

  /* This hangs on some systems (?)
  system ("touch conf.sdltest");
  */
  { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }

  /* HP/UX 9 (%@#!) writes to sscanf strings */
  tmp_version = my_strdup("$min_sdl_version");
  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
     printf("%s, bad version string\n", "$min_sdl_version");
     exit(1);
   }

   if (($sdl_major_version > major) ||
      (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
      (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
    {
      return 0;
    }
  else
    {
      printf("\n*** 'sdl2-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
      printf("*** of SDL required is %d.%d.%d. If sdl2-config is correct, then it is\n", major, minor, micro);
      printf("*** best to upgrade to the required version.\n");
      printf("*** If sdl2-config was wrong, set the environment variable SDL2_CONFIG\n");
      printf("*** to point to the correct copy of sdl2-config, and remove the file\n");
      printf("*** config.cache before re-running configure\n");
      return 1;
    }
}

],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
        CFLAGS="$ac_save_CFLAGS"
        CXXFLAGS="$ac_save_CXXFLAGS"
        LIBS="$ac_save_LIBS"

      fi
      if test "x$sdl_pc" = "xno"; then
        if test "x$no_sdl" = "xyes"; then
          AC_MSG_RESULT(no)
        else
          AC_MSG_RESULT(yes)
        fi
      fi
    fi
  fi
  if test "x$no_sdl" = x ; then
     ifelse([$2], , :, [$2])
  else
     if test "$SDL2_CONFIG" = "no" ; then
       echo "*** The sdl2-config script installed by SDL could not be found"
       echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
       echo "*** your path, or set the SDL2_CONFIG environment variable to the"
       echo "*** full path to sdl2-config."
     else
       if test -f conf.sdltest ; then
        :
       else
          echo "*** Could not run SDL test program, checking why..."
          CFLAGS="$CFLAGS $SDL_CFLAGS"
          CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
          LIBS="$LIBS $SDL_LIBS"
          AC_TRY_LINK([
#include <stdio.h>
#include "SDL.h"

int main(int argc, char *argv[])
{ return 0; }
#undef  main
#define main K_and_R_C_main
],      [ return 0; ],
        [ echo "*** The test program compiled, but did not run. This usually means"
          echo "*** that the run-time linker is not finding SDL or finding the wrong"
          echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
          echo "*** is required on your system"
	  echo "***"
          echo "*** If you have an old version installed, it is best to remove it, although"
          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
        [ echo "*** The test program failed to compile or link. See the file config.log for the"
          echo "*** exact error that occured. This usually means SDL was incorrectly installed"
          echo "*** or that you have moved SDL since it was installed. In the latter case, you"
          echo "*** may want to edit the sdl2-config script: $SDL2_CONFIG" ])
          CFLAGS="$ac_save_CFLAGS"
          CXXFLAGS="$ac_save_CXXFLAGS"
          LIBS="$ac_save_LIBS"
       fi
     fi
     SDL_CFLAGS=""
     SDL_LIBS=""
     ifelse([$3], , :, [$3])
  fi
  AC_SUBST(SDL_CFLAGS)
  AC_SUBST(SDL_LIBS)
  rm -f conf.sdltest
])

dnl #######################################################
dnl ## ALLEGRO
dnl #######################################################

dnl Allegro has a similar *-config program to run, i guess it will
dnl work if I copy the sdl.m4 and replace all 'sdl' with 'allegro' :P

dnl AM_PATH_ALLEGRO([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for ALLEGRO, and define ALLEGRO_CFLAGS and ALLEGRO_LIBS
dnl
AC_DEFUN([AM_PATH_ALLEGRO],
[dnl 
dnl Get the cflags and libraries from the allegro-config script
dnl
AC_ARG_WITH(allegro-prefix,
	[AS_HELP_STRING([--with-allegro-prefix=PFX], [Prefix where Allegro is installed (optional)])],
	allegro_prefix="$withval",
	allegro_prefix="")

AC_ARG_WITH(allegro-exec-prefix,
	[AS_HELP_STRING([--with-allegro-exec-prefix=PFX], [Exec prefix where Allegro is installed (optional)])],
	allegro_exec_prefix="$withval",
	allegro_exec_prefix="")

AC_ARG_ENABLE(allegrotest,
	[AS_HELP_STRING([--disable-allegrotest], [Do not try to compile and run a test Allegro program])],
	,
	enable_allegrotest=yes)

  if test x$allegro_exec_prefix != x ; then
     allegro_args="$allegro_args --exec-prefix=$allegro_exec_prefix"
     if test x${ALLEGRO_CONFIG+set} != xset ; then
        ALLEGRO_CONFIG=$allegro_exec_prefix/bin/allegro-config
     fi
  fi
  if test x$allegro_prefix != x ; then
     allegro_args="$allegro_args --prefix=$allegro_prefix"
     if test x${ALLEGRO_CONFIG+set} != xset ; then
        ALLEGRO_CONFIG=$allegro_prefix/bin/allegro-config
     fi
  fi

  AC_REQUIRE([AC_CANONICAL_TARGET])
  AC_PATH_PROG(ALLEGRO_CONFIG, allegro-config, no)
  min_allegro_version=ifelse([$1], ,0.11.0,$1)
  AC_MSG_CHECKING(for ALLEGRO - version >= $min_allegro_version)
  no_allegro=""
  if test "$ALLEGRO_CONFIG" = "no" ; then
    no_allegro=yes
  else
    ALLEGRO_CFLAGS=`$ALLEGRO_CONFIG $allegroconf_args --cflags`
    ALLEGRO_LIBS=`$ALLEGRO_CONFIG $allegroconf_args --libs`

    allegro_major_version=`$ALLEGRO_CONFIG $allegro_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    allegro_minor_version=`$ALLEGRO_CONFIG $allegro_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    allegro_micro_version=`$ALLEGRO_CONFIG $allegro_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    if test "x$enable_allegrotest" = "xyes" ; then
      ac_save_CFLAGS="$CFLAGS"
      ac_save_LIBS="$LIBS"
      CFLAGS="$CFLAGS $ALLEGRO_CFLAGS"
      LIBS="$LIBS $ALLEGRO_LIBS"
dnl
dnl Now check if the installed ALLEGRO is sufficiently new. (Also sanity
dnl checks the results of allegro-config to some extent
dnl
      rm -f conf.allegrotest
      AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "allegro.h"

char*
my_strdup (char *str)
{
  char *new_str;
  
  if (str)
    {
      new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
      strcpy (new_str, str);
    }
  else
    new_str = NULL;
  
  return new_str;
}

int main (int argc, char *argv[])
{
  int major, minor, micro;
  char *tmp_version;

  /* This hangs on some systems (?)
  system ("touch conf.allegrotest");
  */
  { FILE *fp = fopen("conf.allegrotest", "a"); if ( fp ) fclose(fp); }

  /* HP/UX 9 writes to sscanf strings */
  tmp_version = my_strdup("$min_allegro_version");
  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
     printf("%s, bad version string\n", "$min_allegro_version");
     exit(1);
   }

   if (($allegro_major_version > major) ||
      (($allegro_major_version == major) && ($allegro_minor_version > minor)) ||
      (($allegro_major_version == major) && ($allegro_minor_version == minor) && ($allegro_micro_version >= micro)))
    {
      return 0;
    }
  else
    {
      printf("\n*** 'allegro-config --version' returned %d.%d.%d, but the minimum version\n", $allegro_major_version, $allegro_minor_version, $allegro_micro_version);
      printf("*** of Allegro required is %d.%d.%d. If allegro-config is correct, then it is\n", major, minor, micro);
      printf("*** best to upgrade to the required version.\n");
      printf("*** If allegro-config was wrong, set the environment variable ALLEGRO_CONFIG\n");
      printf("*** to point to the correct copy of allegro-config, and remove the file\n");
      printf("*** config.cache before re-running configure\n");
      return 1;
    }
}

END_OF_MAIN();

],, no_allegro=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
       CFLAGS="$ac_save_CFLAGS"
       LIBS="$ac_save_LIBS"
     fi
  fi
  if test "x$no_allegro" = x ; then
     AC_MSG_RESULT(yes)
     ifelse([$2], , :, [$2])     
  else
     AC_MSG_RESULT(no)
     if test "$ALLEGRO_CONFIG" = "no" ; then
       echo "*** The allegro-config script installed by Allegro could not be found"
       echo "*** If Allegro was installed in PREFIX, make sure PREFIX/bin is in"
       echo "*** your path, or set the ALLEGRO_CONFIG environment variable to the"
       echo "*** full path to allegro-config."
     else
       if test -f conf.allegrotest ; then
        :
       else
          echo "*** Could not run Allegro test program, checking why..."
          CFLAGS="$CFLAGS $ALLEGRO_CFLAGS"
          LIBS="$LIBS $ALLEGRO_LIBS"
          AC_TRY_LINK([
#include <stdio.h>
#include "ALLEGRO.h"

int main(int argc, char *argv[])
{ return 0; }

END_OF_MAIN();

#undef  main
#define main K_and_R_C_main
],      [ return 0; ],
        [ echo "*** The test program compiled, but did not run. This usually means"
          echo "*** that the run-time linker is not finding Allegro or finding the wrong"
          echo "*** version of Allegro. If it is not finding Allegro, you'll need to set your"
          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
          echo "*** is required on your system"
	  echo "***"
          echo "*** If you have an old version installed, it is best to remove it, although"
          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
        [ echo "*** The test program failed to compile or link. See the file config.log for the"
          echo "*** exact error that occured. This usually means Allegro was incorrectly installed"
          echo "*** or that you have moved Allegro since it was installed. In the latter case, you"
          echo "*** may want to edit the allegro-config script: $ALLEGRO_CONFIG" ])
          CFLAGS="$ac_save_CFLAGS"
          LIBS="$ac_save_LIBS"
       fi
     fi
     ALLEGRO_CFLAGS=""
     ALLEGRO_LIBS=""
     ifelse([$3], , :, [$3])
  fi
  AC_SUBST(ALLEGRO_CFLAGS)
  AC_SUBST(ALLEGRO_LIBS)
  rm -f conf.allegrotest
])