# 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

# serial 1

dnl AM_PATH_SDL([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,[  --with-sdl-prefix=PFX   Prefix where SDL is installed (optional)],

            sdl_prefix="$withval", sdl_prefix="")

AC_ARG_WITH(sdl-exec-prefix,[  --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],

            sdl_exec_prefix="$withval", sdl_exec_prefix="")

AC_ARG_ENABLE(sdltest, [  --disable-sdltest       Do not try to compile and run a test SDL program],

		    , enable_sdltest=yes)

  min_sdl_version=ifelse([$1], ,0.9.0,$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${SDL_CONFIG+set} != xset ; then

        SDL_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${SDL_CONFIG+set} != xset ; then

        SDL_CONFIG=$sdl_prefix/bin/sdl2-config

      fi

    fi

  fi

  if test "x$sdl_pc" = xyes ; then

    no_sdl=""

    SDL_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(SDL_CONFIG, sdl2-config, no, [$PATH])

    PATH="$as_save_PATH"

    AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)

    no_sdl=""

    if test "$SDL_CONFIG" = "no" ; then

      no_sdl=yes

    else

      SDL_CFLAGS=`$SDL_CONFIG $sdl_config_args --cflags`

      SDL_LIBS=`$SDL_CONFIG $sdl_config_args --libs`

      sdl_major_version=`$SDL_CONFIG $sdl_config_args --version | \

             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`

      sdl_minor_version=`$SDL_CONFIG $sdl_config_args --version | \

             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`

      sdl_micro_version=`$SDL_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 SDL_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

    fi

    if test "x$no_sdl" = x ; then

      AC_MSG_RESULT(yes)

    else

      AC_MSG_RESULT(no)

    fi

  fi

  if test "x$no_sdl" = x ; then

     ifelse([$2], , :, [$2])

  else

     if test "$SDL_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 SDL_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: $SDL_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

])

# pkg.m4 - Macros to locate and utilise pkg-config.            -*- Autoconf -*-

# serial 1 (pkg-config-0.24)

# 

# Copyright © 2004 Scott James Remnant <scott@netsplit.com>.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#

# As a special exception to the GNU General Public License, if you

# distribute this file as part of a program that contains a

# configuration script generated by Autoconf, you may include it under

# the same distribution terms that you use for the rest of that program.

# PKG_PROG_PKG_CONFIG([MIN-VERSION])

# ----------------------------------

AC_DEFUN([PKG_PROG_PKG_CONFIG],

[m4_pattern_forbid([^_?PKG_[A-Z_]+$])

m4_pattern_allow([^PKG_CONFIG(_PATH)?$])

AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])

AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])

AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])

if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then

	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])

fi

if test -n "$PKG_CONFIG"; then

	_pkg_min_version=m4_default([$1], [0.9.0])

	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])

	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then

		AC_MSG_RESULT([yes])

	else

		AC_MSG_RESULT([no])

		PKG_CONFIG=""

	fi

fi[]dnl

])# PKG_PROG_PKG_CONFIG

# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])

#

# Check to see whether a particular set of modules exists.  Similar

# to PKG_CHECK_MODULES(), but does not set variables or print errors.

#

# Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])

# only at the first occurence in configure.ac, so if the first place

# it's called might be skipped (such as if it is within an "if", you

# have to call PKG_CHECK_EXISTS manually

# --------------------------------------------------------------

AC_DEFUN([PKG_CHECK_EXISTS],

[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl

if test -n "$PKG_CONFIG" && \

    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then

  m4_default([$2], [:])

m4_ifvaln([$3], [else

  $3])dnl

fi])

# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])

# ---------------------------------------------

m4_define([_PKG_CONFIG],

[if test -n "$$1"; then

    pkg_cv_[]$1="$$1"

 elif test -n "$PKG_CONFIG"; then

    PKG_CHECK_EXISTS([$3],

                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],

		     [pkg_failed=yes])

 else

    pkg_failed=untried

fi[]dnl

])# _PKG_CONFIG

# _PKG_SHORT_ERRORS_SUPPORTED

# -----------------------------

AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],

[AC_REQUIRE([PKG_PROG_PKG_CONFIG])

if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then

        _pkg_short_errors_supported=yes

else

        _pkg_short_errors_supported=no

fi[]dnl

])# _PKG_SHORT_ERRORS_SUPPORTED

# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],

# [ACTION-IF-NOT-FOUND])

#

#

# Note that if there is a possibility the first call to

# PKG_CHECK_MODULES might not happen, you should be sure to include an

# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac

#

#

# --------------------------------------------------------------

AC_DEFUN([PKG_CHECK_MODULES],

[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl

AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl

AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl

pkg_failed=no

AC_MSG_CHECKING([for $1])

_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])

_PKG_CONFIG([$1][_LIBS], [libs], [$2])

m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS

and $1[]_LIBS to avoid the need to call pkg-config.

See the pkg-config man page for more details.])

if test $pkg_failed = yes; then

   	AC_MSG_RESULT([no])

        _PKG_SHORT_ERRORS_SUPPORTED

        if test $_pkg_short_errors_supported = yes; then

	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors "$2" 2>&1`

        else 

	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors "$2" 2>&1`

        fi

	# Put the nasty error message in config.log where it belongs

	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD

	m4_default([$4], [AC_MSG_ERROR(

[Package requirements ($2) were not met:

$$1_PKG_ERRORS

Consider adjusting the PKG_CONFIG_PATH environment variable if you

installed software in a non-standard prefix.

_PKG_TEXT])dnl

        ])

elif test $pkg_failed = untried; then

     	AC_MSG_RESULT([no])

	m4_default([$4], [AC_MSG_FAILURE(

[The pkg-config script could not be found or is too old.  Make sure it

is in your PATH or set the PKG_CONFIG environment variable to the full

path to pkg-config.

_PKG_TEXT

To get pkg-config, see <http://pkg-config.freedesktop.org/>.])dnl

        ])

else

	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS

	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS

        AC_MSG_RESULT([yes])

	$3

fi[]dnl

])# PKG_CHECK_MODULES