AC_PREREQ(2.57)

######################
# aegisub version info
######################
m4_define([aegisub_major_version], [2])
m4_define([aegisub_minor_version], [1])
m4_define([aegisub_version], [aegisub_major_version.aegisub_minor_version-dev])


###################
# Required packages
###################
m4_define([ffmpeg_required_version], [1])
m4_define([portaudio_required_version], [1])
m4_define([pulseaudio_required_version], [1])

m4_define([pkgconfig_required_version], [0.20])
m4_define([freetype_required_version], [9.7.0])
m4_define([fontconfig_required_version], [2.4])
m4_define([perl_required_version], [5.004])
m4_define([ruby_required_version], [1.8])
m4_define([lua_auto4_required_version], [5.1])
m4_define([lua_auto3_required_version], [5.0])


#######
# Setup
#######
AC_INIT([Aegisub], [aegisub_version],, [aegisub])
AC_CONFIG_SRCDIR([aegisub/main.cpp])
AM_INIT_AUTOMAKE
AC_CONFIG_HEADER([aegisub/posix/acconf.h])
AC_GNU_SOURCE
AC_CANONICAL_HOST

###########################
# Check target architecture
###########################

AC_MSG_CHECKING([for target architecture])
case x"$target" in
  xNONE | x)
    target_or_host="$host" ;;
  *)
    target_or_host="$target" ;;
esac
AC_MSG_RESULT([$target_or_host])

case "$target_or_host" in
  *-*-darwin*)
    build_darwin="yes"
  ;;

  *-*-linux*)
    build_linux="yes"
  ;;

  *)
    build_default="yes"
    ;;
esac

AM_CONDITIONAL([BUILD_DARWIN], [test "$build_darwin" = "yes"])
AM_CONDITIONAL([BUILD_DEFAULT], [test "$build_default" = "yes"])

AM_CONDITIONAL([FONTLISTER_FONTCONFIG], [test "$build_darwin" != "yes"])
AM_CONDITIONAL([FONTLISTER_FREETYPE], [test "$build_darwin" = "yes"])

AC_C_BIGENDIAN(
    AC_DEFINE([HAVE_BIG_ENDIAN], [1], [Big Endian]),
    AC_DEFINE([HAVE_LITTLE_ENDIAN], [1], [Little Endian]),
    AC_DEFINE([HAVE_DYNAMIC_ENDIAN], [1], [Unknown endian]),
    AC_DEFINE([HAVE_UNIVERSAL_ENDIAN], [1], [Universal Endian (MAC Universal PPC/Intel Binaries, uses HAVE_DYNAMIC_ENDIAN)])
)


########################
# Configurable variables
########################
aegisubdatadir="$datadir/aegisub"
AC_SUBST(aegisubdatadir)


####################
# Check for programs
####################
CHECK_GNU_MAKE
AC_PROG_CC
AC_PROG_CXX
AC_LANG(C++)
AC_PROG_LIBTOOL
AC_PROG_INSTALL
PKG_PROG_PKG_CONFIG([0.20])


#################
# Developers only
#################
AM_MAINTAINER_MODE

AC_ARG_VAR([DEBUG_FLAGS], [Debug flag to use with --enable debug (default: -g)])
if test -z "$DEBUG_FLAGS"; then
  DEBUG_FLAGS="-g";
fi

AC_MSG_CHECKING([whether to turn on debugging])
AC_ARG_ENABLE(debug, [  --enable-debug          turn on debugging (default=no)])
if test "$enable_debug" = "yes"; then
  AC_MSG_RESULT([yes ($DEBUG_FLAGS)])
  CPPFLAGS="$DEBUG_FLAGS $CPPFLAGS"
else
  AC_MSG_RESULT([no])
fi

AC_ARG_ENABLE(build-dist)
if test "$enable_build_dist" = "yes"; then
  SVN_VERSION=`svnversion .`
  PACKAGE_STRING="${PACKAGE_STRING}-r$SVN_VERSION"
  PACKAGE_VERSION="${PACKAGE_VERSION}-r$SVN_VERSION"
  VERSION="${VERSION}-r$SVN_VERSION"
fi

AC_ARG_ENABLE(old-ffmpeg, [  --enable-old-ffmpeg     use ancient ffmpeg header locations (default=no)])
if test "$enable_ancient_ffmpeg" = "yes"; then
  AC_DEFINE([WITH_ANCIENT_FFMPEG], [1], [Using ancient ffmpeg header locations])
fi


###################################################
# Check for pthreads and setup variables / compiler
###################################################
ACX_PTHREAD([], [AC_MSG_FAILURE([aegisub requires pthreads])])
#LIBS="$PTHREAD_LIBS $LIBS";
#CFLAGS="$CFLAGS $PTHREAD_CFLAGS";
CC="$PTHREAD_CC";


######################
# Check compiler flags
######################
AC_C_FLAG([-Wall])
AC_C_FLAG([-O2])
AC_C_FLAG([-Wextra],[AC_C_FLAG([-W])])
AC_C_FLAG([-Wno-unused-parameter])
AC_C_FLAG([-std=gnu99])
AC_CXX_FLAG([-Wall])
AC_CXX_FLAG([-Wextra],[AC_CXX_FLAG([-W])])
AC_CXX_FLAG([-Wno-unused-parameter])
AC_CXX_FLAG([-Wno-long-long])
AC_CXX_FLAG([-O2])
AC_CXX_FLAG([-fpermissive])
AC_CXX_FLAG([-fno-strict-aliasing])
AC_CXX_FLAG([-std=c++98])


######################################
# Check Headers / Features / Libraries
######################################
AC_PATH_XTRA
AC_HEADER_STDC
AC_HEADER_STDBOOL
AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE
AC_CHECK_LIB([m], [main])
AC_LIBTOOL_DLOPEN_SELF
AC_MSG_CHECKING([[whether preprocessor supports #pragma once]])
AC_PREPROC_IFELSE(
  [AC_LANG_PROGRAM([[#pragma once]])],
  [
    AC_MSG_RESULT([yes])
    AC_DEFINE([HAVE_PRAGMA_ONCE], [1], [Preprocessor support for #pragma once])
  ],
[AC_MSG_RESULT([no])])

AX_OPENMP([], [with_openmp="no"])
AM_CONDITIONAL([HAVE_OPENMP], [test "$with_openmp" != "no"])
AC_SUBST(OPENMP_CXXFLAGS)



##############################
# Program Support and Features
##############################
#################
## Wide Character
#################
AC_CHECK_HEADER([wchar.h],,[AC_MSG_FAILURE([aegisub requires wide character support])])


#########
## OpenGL
#########
AX_CHECK_GL
if test ! "$GL_LIBS"; then
	AC_MSG_FAILURE([aegisub requires GL support.])
fi
AC_SUBST(GL_CFLAGS)
AC_SUBST(GL_LIBS)

#XXX: This needs to be fixed for OSX.
AC_AGI_COMPILE([OpenGL], [opengl], [$GL_CFLAGS], [$GL_LIBS],[
int main(void) {
  return 0;
}])

if test "$agi_with_opengl" = "no"; then
	AC_MSG_FAILURE([Please install a working OpenGL library.])
fi

AC_AGI_COMPILE([OpenGLU], [openglu], [$GL_CFLAGS], [$GL_LIBS -lGLU],[
#include <GL/glu.h>
int main(void) {
  return 0;
}])

if test "$agi_with_openglu" = "no" && test "$build_darwin" != "yes"; then
	AC_MSG_FAILURE([Please install a working OpenGL GLU library.])
fi


###########
## Freetype
###########
PKG_CHECK_MODULES(FREETYPE, freetype2 >= 9.7.0,
  AC_DEFINE(WITH_FREETYPE2, 1, [Enable FreeType 2 support.]),
  [AC_MSG_FAILURE([aegisub requires >= FreeType2 2.1.9])])

AC_AGI_COMPILE([Freetype], [freetype], [$FREETYPE_CFLAGS], [$FREETYPE_LIBS],[
#include <ft2build.h>
#include FT_FREETYPE_H
int main(void) {
  FT_Library ft;
  if (FT_Init_FreeType(&ft)) { return 1; }
  return 0;
}])

if test "$agi_with_freetype" = "no"; then
    AC_MSG_FAILURE([Please install a working Freetype library.])
fi


#############
## Fontconfig
#############
PKG_CHECK_MODULES(FONTCONFIG, fontconfig >= 2.4,
  AC_DEFINE(WITH_FONTCONFIG, 1, [Enable FontConfig support.]),
  [AC_MSG_FAILURE([aegisub requires >= fontconfig >= 2.4])])
AC_SUBST(FONTCONFIG_CFLAGS)
AC_SUBST(FONTCONFIG_LIBS)

AC_AGI_COMPILE([FontConfig], [fontconfig], [$FONTCONFIG_CFLAGS], [$FONTCONFIG_LIBS],[
#include <fontconfig/fontconfig.h>
int main(void) {
  int fc = FcInit();
  FcConfig* config;
  config = FcConfigGetCurrent();
  if ((!config) || (!fc)) { return 1;}
  return 0;
}])

if test "$agi_with_fontconfig" = "no"; then
    AC_MSG_FAILURE([Please install a working Fontconfig library.])
fi


########
## iconv
########
AC_ARG_VAR([ICONV_CFLAGS], [CFLAGS to use for iconv (default: CPPFLAGS)])
AC_ARG_VAR([ICONV_LDFLAGS], [LDFLAGS to use for iconv (default: LDFLAGS -liconv)])

if test -z "$ICONV_LDFLAGS"; then
  if test "$build_linux" = "yes"; then
    ICONV_LDFLAGS="$LDFLAGS"
  else
    ICONV_LDFLAGS="$LDFLAGS -liconv";
  fi
fi

if test -z "$ICONV_CFLAGS"; then
  ICONV_CFLAGS="$CPPFLAGS";
fi

  AC_AGI_COMPILE([iconv], [iconv], [$ICONV_CFLAGS], [$ICONV_LDFLAGS],[
#include <iconv.h>
int main(void) {
  iconv_t ic;
  ic = iconv_open ("UTF-8", "UTF-8");
  if (!ic) return 1;
  return 0;
} ])

AC_SUBST(ICONV_LDFLAGS)
AC_SUBST(ICONV_CFLAGS)



###############
# Audio Players
###############
#######
## ALSA
#######
AC_ARG_WITH(alsa, [  --without-alsa          build without ALSA audio provider. (default: auto)], alsa_disabled="(disabled)")
if test "x$with_alsa" != xno; then
  AC_CHECK_LIB([asound], [snd_pcm_open], [ALSA_LDFLAGS="-lasound"; found_audio=yes; with_alsa=yes], [with_alsa=no])
fi
if test "$with_alsa" = "yes"; then
  AC_DEFINE(WITH_ALSA, 1, [Enable ALSA Support])
fi

AC_SUBST(ALSA_LDFLAGS)
AM_CONDITIONAL([HAVE_ALSA], [test "$with_alsa" != "no"])

############
## PortAudio
############
AC_ARG_WITH(portaudio,[  --without-portaudio     build without PortAudio audio provider.
                          (default: auto)], portaudio_disabled="(disabled)")

if test "x$with_portaudio" != xno; then
  aegisub_save_CPPFLAGS="$CPPFLAGS"
  CPPFLAGS="$CPPFLAGS $PTHREAD_CFLAGS $PTHREAD_LIBS"
  AC_CHECK_LIB([portaudio], [Pa_Initialize], [PORTAUDIO_LDFLAGS="-lportaudio"; found_audio=yes; with_portaudio=yes], [with_portaudio=no])
fi

if test "x$with_portaudio" != xno; then
  AC_CHECK_LIB([portaudio], [Pa_GetStreamTime], [LIBS="-lportaudio"], [with_portaudio_getstreamtime=no])
    if test "x$with_portaudio_getstreamtime" != xno; then
     AC_DEFINE(HAVE_PA_GETSTREAMTIME, 1, [Define to 1 if Pa_GetStreamTime is available in PortAudio])
  fi
CPPFLAGS="$aegisub_save_CPPFLAGS"
fi

AC_AGI_COMPILE([PortAudio], [portaudio], [$CFLAGS $PTHREAD_CFLAGS], [$LDFLAGS $PORTAUDIO_LDFLAGS],[
#include <portaudio.h>
int main(void) {
  PaError err = Pa_Initialize();
  if (err != paNoError) return 1;
  return 0;
}])

if test "$agi_with_portaudio" = "no" && test "$with_portaudio" = "yes"; then
  AC_MSG_WARN([PortAudio detected, but it doesn't work...])
  with_portaudio="no"
fi

if test "$with_portaudio" = "yes"; then
  AC_DEFINE(WITH_PORTAUDIO, 1, [Enable PortAudio Audio Provider])
fi

AC_SUBST(PORTAUDIO_LDFLAGS)
AM_CONDITIONAL([HAVE_PORTAUDIO], [test "$with_portaudio" != "no"])


#############
## PulseAudio
#############

AC_ARG_WITH(pulseaudio,[  --without-pulseaudio    build without PulseAudio audio provider.
                          (default: auto)], pulseaudio_disabled="(disabled)")
if test "x$with_pulseaudio" != xno; then
  PKG_CHECK_MODULES(LIBPULSE, libpulse >= 0.5, [found_audio=yes; with_pulseaudio=yes], [with_pulseaudio=no])
fi

AC_AGI_COMPILE([PuleseAudio], [pulseaudio], [$LIBPULSE_CFLAGS], [$LIBPULSE_LIBS],[
#include <pulse/pulseaudio.h>
int main(void) {
  pa_threaded_mainloop *mainloop = pa_threaded_mainloop_new();
  if (!mainloop) return 1;
  return 0;
}])

if test "$agi_with_pulseaudio" = "no" && test "$with_pulseaudio" = "yes"; then
  AC_MSG_WARN([PulseAudio detected, but it doesn't work...])
  with_pulseaudio="no"
fi

AM_CONDITIONAL([HAVE_PULSEAUDIO], [test "$with_pulseaudio" != "no"])
if test "$with_pulseaudio" = "yes"; then
  AC_DEFINE(WITH_PULSEAUDIO, 1, [Enable PulseAudio support])
fi

#########
## OpenAL
#########
AC_ARG_WITH(openal,[  --without-openal        build without OpenAL audio provider.
                          (default: auto)], openal_disabled="(disabled)")
if test "x$with_openal" != xno; then
  PKG_CHECK_MODULES(OPENAL, openal >= 0.0.8, [found_audio=yes; with_openal=yes], [with_openal=no])
fi

AC_AGI_COMPILE([OpenAL], [openal], [$OPENAL_CFLAGS], [$OPENAL_LIBS],[
#if defined(__APPLE__)
#include <OpenAL/AL.h>
#include <OpenAL/ALC.h>
#else
#include <AL/al.h>
#include <AL/alc.h>
#endif
int main(void) {
  ALCdevice *device = alcOpenDevice(0);
  if (!device) return 1;
  ALCcontext *context = alcCreateContext(device, 0);
  if (!context) return 1;
  return 0;
}])

if test "$agi_with_openal" = "no" && test "$with_openal" = "yes"; then
  AC_MSG_WARN([OpenAL detected, but it doesn't work...])
  with_openal="no"
fi

AM_CONDITIONAL([HAVE_OPENAL], [test "$with_openal" != "no"])
if test "$with_openal" = "yes"; then
  AC_DEFINE(WITH_OPENAL, 1, [Enable OpenAL support])
fi



#################
# Video Providers
#################

AC_ARG_WITH(ffmpeg, [  --without-ffmpeg        build without FFMPEG video provider. (default: auto)], ffmpeg_disabled="(disabled)")

if test "$with_ffmpeg" != "no"; then
  AC_CHECK_LIB([avcodec], [avcodec_init],[AVCODEC_LDFLAGS="-lavcodec"; with_ffmpeg="yes"], [with_ffmpeg="no"])
  AC_CHECK_LIB([avformat], [av_read_frame],[AVFORMAT_LDFLAGS="-lavformat"; with_ffmpeg="yes"], [with_ffmpeg="no"])

  if test "$build_darwin" = "yes"; then
    AC_CHECK_LIB([avutil], [av_free],[AVUTIL_LDFLAGS="-lavutil"; with_ffmpeg="yes"], [with_ffmpeg="no"])
  fi

  AC_CHECK_LIB([avformat], [sws_scale],[with_swscale="yes"], [with_swscale="no"])
  if test "$with_swscale" = "no"; then
    AC_CHECK_LIB([swscale], [sws_scale],[SWSCALE_LDFLAGS="-lswscale"; with_swscale_lib="yes"], [with_swscale_lib="no"])
  fi

  if test "$with_swscale" = "no" && test "$with_swscale_lib" = "no"; then
    with_ffmpeg="no";
  fi

  if test "$with_ffmpeg" = "yes"; then
    found_video_provider="yes"
    AC_DEFINE(WITH_FFMPEG, 1, [Enable FFMPEG Video Provider])
  fi
fi


AC_SUBST(SWSCALE_LDFLAGS)
AC_SUBST(AVCODEC_LDFLAGS)
AC_SUBST(AVFORMAT_LDFLAGS)
AC_SUBST(AVUTIL_LDFLAGS)
AM_CONDITIONAL([HAVE_FFMPEG], [test "$with_ffmpeg" = "yes"])




###################
# Subtitle Provider
###################

AC_ARG_ENABLE(libass, [  --disable-libass        disable libass support (default=enabled)],libass_disabled="(disabled)")

if test "$enable_libass" != "no"; then
  if test "$agi_with_iconv" = "yes"; then
    LIBASS_LIBS="-L../libass -lass_aegisub"
    LIBASS_CFLAGS="-I../libass"
    with_libass="yes"
  else
    AC_MSG_WARN([libiconv is required for libass support.])
    with_libass="no"
  fi
fi

if test "$with_libass" = "yes"; then
  AC_DEFINE(WITH_LIBASS, 1, [Enable libass Subtitle Provider])
else
  with_libass="no"
fi

AC_SUBST(LIBASS_LIBS)
AC_SUBST(LIBASS_CFLAGS)
AM_CONDITIONAL([WITH_LIBASS], [test "$with_libass" = "yes"])



AC_ARG_ENABLE(csri, [  --disable-csri          disable CSRI (ASA) support (default=enabled)],csri_disabled="(disabled)")

if test "$enable_csri" != "no"; then
  PKG_CHECK_MODULES(CSRI, csri >= 0.1.0, with_csri="yes", with_csri="no")
  if test "$with_csri" = "yes"; then
    AC_DEFINE(WITH_CSRI, 1, [Enable CSRI (ASA) Subtitle Provider])
  fi
else
  $with_csri = "no"
fi

AM_CONDITIONAL([WITH_CSRI], [test "$with_csri" = "yes"])

PKG_CHECK_MODULES(ASA, asa >= 0.3.2, with_asa="yes", with_asa="no")



###########
## Hunspell
###########
AC_ARG_WITH(hunspell, [  --without-hunspell      build without hunspell support (default: auto)], hunspell_disabled="(disabled)")

if test "$with_hunspell" != "no"; then
  PKG_CHECK_MODULES(HUNSPELL, hunspell >= 1.2.0, [with_hunspell=yes], [with_hunspell=no])
  AC_AGI_COMPILE([Hunspell], [hunspell], [$HUNSPELL_CFLAGS], [$HUNSPELL_LIBS],[
#include <hunspell.hxx>
int main(void) {
  Hunspell *hunspell;
  hunspell = new Hunspell(".", ".");
  if (!hunspell) return 1;
  return 0;
}  ])
fi

if test "$agi_with_hunspell" = "no" && test "$with_hunspell" = "yes"; then
  AC_MSG_WARN([Hunspell detected, but it doesn't work...])
fi

if test "$with_hunspell" = "yes"; then
  AC_DEFINE(WITH_HUNSPELL, 1, [Enable Hunspell support.])
fi

AM_CONDITIONAL([HAVE_HUNSPELL], [test "$with_hunspell" != "no"])



######################
## universalchardetect
######################
AC_ARG_ENABLE(univchardet, [  --disable-univchardet   disble universalchardet support.], univchardet_disabled="(disabled)")
if test "$enable_univchardet" != "no"; then
  with_univchardet="yes"
  AC_DEFINE(WITH_UNIVCHARDET, 1, [Enable universalchardet support])
else
  with_univchardet="no"
fi
AM_CONDITIONAL([HAVE_UNIVCHARDET], [test "$with_univchardet" != "no"])




############
# Automation
############

############
## Auto4 LUA
############

AC_ARG_WITH(lua,
[  --without-lua           build without lua 5.1 (auto4)], [lua51_disabled="(disabled)"])

AC_ARG_VAR([LUA_CFLAGS], [CFLAGS to use for LUA 5.1 (default: CPPFLAGS)])
AC_ARG_VAR([LUA_LDFLAGS], [LDFLAGS to use for LUA 5.1 (default: -llua)])

if test -z "$LUA_CFLAGS"; then
  LUA_CFLAGS="$CPPFLAGS";
fi

if test -z "$LUA_LDFLAGS"; then
  LUA_LDFLAGS="-llua";
fi

aegisub_save_LIBS="$LIBS"
LIBS="$LUA_LDFLAGS"
if test "$with_lua" != no; then
  AC_AGI_COMPILE([Lua 5.1 (auto4)], [lua], [$LUA_CFLAGS], [],[
extern "C" {
#include <lua.h>
#include <lauxlib.h>
}

int main () {
  lua_State *L = luaL_newstate();
  lua_pushstring(L, "test");
  int res = lua_objlen(L, -1) == 4;
  lua_close(L);
  return !res;
}])
fi
LIBS="$aegisub_save_LIBS"

if test "$agi_with_lua" = "yes"; then
  with_auto4="yes"
  with_automation="yes"
  AC_DEFINE(WITH_AUTO4_LUA, 1, [Enable Automation (auto4), requires lua])
else
  with_auto4="no"
fi

AM_CONDITIONAL([HAVE_AUTO4_LUA], [test "$with_auto4" != "no"])
AC_SUBST(LUA_CFLAGS)
AC_SUBST(LUA_LDFLAGS)


##################
## Auto3 (LUA 5.0)
##################

AC_ARG_VAR([LUA50_CFLAGS], [CFLAGS to use for LUA 5.0 (default: CPPFLAGS)])
AC_ARG_VAR([LUA50_LDFLAGS], [LDFLAGS to use for LUA 5.1 (default: -llua -llualib)])
if test -z "$LUA50_LDFLAGS"; then
  LUA50_LDFLAGS="-llua -llualib";
fi

if test -z "$LUA50_CFLAGS"; then
  LUA50_CFLAGS="$CPPFLAGS";
fi

AC_ARG_WITH(lua50,
[  --without-lua50         build without lua 5.0 (auto3)], [lua50_disabled="(disabled)"])

if test "$with_lua50" != no; then
  AC_AGI_COMPILE([Lua 5.0 (auto3)], [lua50], [$LUA50_CFLAGS], [$LUA50_LDFLAGS],[
extern "C" {
#include "lua.h"
#include "lauxlib.h"
}
#ifdef lua_open
#error This is not Lua 5.0
#endif
int main() {
  lua_State *L = lua_open();
  if (!L) return 1;
  luaL_newmetatable(L, "test");
  lua_close(L);
}])
fi

if test "$agi_with_lua50" = "yes"; then
  with_auto3="yes"
  with_automation="yes"
  AC_DEFINE(WITH_AUTO3, 1, [Enable Automation (auto3, DEPRECIATED!), requires lua 5.0])
else
  with_auto3="no"
fi

AM_CONDITIONAL([HAVE_AUTO3_LUA], [test "$with_auto3" != "no"])
AC_SUBST(LUA50_CFLAGS)
AC_SUBST(LUA50_LDFLAGS)



#############
## Auto4 PERL
#############
AC_ARG_WITH(perl, [  --without-perl          build without PERL Automation. (default: auto)], perl_disabled="(disabled)")
AC_ARG_WITH(perl-bin, [  --with-perl-bin=PATH    location of PERL binary. (default: $PATH)], [WITH_PERL_BIN="$withval"])

AC_ARG_VAR([PERL_CFLAGS], [CFLAGS to use for Perl (default: -MExtUtils::Embed -eccflags -eperl_inc)])
AC_ARG_VAR([PERL_LDFLAGS], [LDFLAGS to use for Perl (default: -MExtUtils::Embed -eldopts)])

if test -z "$perl_disabled"; then
  if test -z "$WITH_PERL_BIN"; then
    AC_PATH_PROG([PERL_BIN],perl,no)
  else
    PERL_BIN="$WITH_PERL_BIN"
  fi

  # XXX: add a --with-perlconsole flag.
  # AC_DEFINE(WITH_PERLCONSOLE, 1, [Enable PERL Console support (for debugging purposes)])

  if test "$PERL_BIN" != "no"; then
    AC_CACHE_CHECK(
      [checking for perl version >= 5.004], [with_perl],
      [if $PERL_BIN -e 'require 5.004'; then with_perl="yes"; else with_perl="no"; fi])

    if test "$with_perl" = "yes"; then
      AC_MSG_CHECKING([$PERL_BIN cflags])
      if test -z "$PERL_CFLAGS"; then
        PERL_CFLAGS=`$PERL_BIN -MExtUtils::Embed -eccflags -eperl_inc`
      fi
      AC_MSG_RESULT([$PERL_CFLAGS])

      AC_MSG_CHECKING([$PERL_BIN libs])
      if test -z "$PERL_LDFLAGS"; then
        PERL_LDFLAGS=`$PERL_BIN -MExtUtils::Embed -eldopts`
      fi
      AC_MSG_RESULT([$PERL_LDFLAGS])

      AC_AGI_COMPILE([Perl], [perl], [$PERL_CFLAGS], [$PERL_LDFLAGS],[
#include <EXTERN.h>
#include <perl.h>
int main(int argc, char **argv) {
  static PerlInterpreter *my_perl;
  PERL_SYS_INIT3(&argc,&argv,&env);
  my_perl = perl_alloc();
  if (!my_perl) return 1;
  return 0;
}])
    fi
  fi
fi

if test "$agi_with_perl" = "no" && test "$with_perl" = "yes"; then
  AC_MSG_WARN([Perl detected, but it doesn't work...])
  with_perl="no"
fi

if test "$with_perl" = "yes"; then
  with_automation="yes"
  AC_DEFINE(WITH_PERL, 1, [Enable PERL support.])
fi

AC_SUBST(PERL_CFLAGS)
AC_SUBST(PERL_LDFLAGS)

AM_CONDITIONAL([HAVE_AUTO4_PERL], [test "$with_perl" != "no"])



#############
## Auto4 Ruby
#############
AC_ARG_WITH(ruby, [  --without-ruby          build without Ruby Automation. (default: auto)], ruby_disabled="(disabled)")
AC_ARG_WITH(ruby-bin, [  --with-ruby-bin=PATH    location of RUBY binary. (default: $PATH)], [WITH_RUBY_BIN="$withval"])

AC_ARG_VAR([RUBY_CFLAGS], [CFLAGS to use for Ruby (default: Config::CONFIG archdir + CFLAGS)])
AC_ARG_VAR([RUBY_LDFLAGS], [LDFLAGS to use for Ruby (default: Cofig::CONFIG LIBRUBYARG)])

if test -z "$ruby_disabled"; then
  if test -z "$WITH_RUBY_BIN"; then
    AC_PATH_PROG([RUBY_BIN],ruby,no)
  else
    RUBY_BIN="$WITH_RUBY_BIN"
  fi


  if test "$RUBY_BIN" != "no"; then
    AC_CACHE_CHECK(
      [checking for ruby version >= 1.8], [with_ruby],
      [if $RUBY_BIN -r rbconfig -e 'if Config::CONFIG@<:@"ruby_version"@:>@.to_f >= 1.8  then exit(0) else exit(1) end'; then
        with_ruby="yes"; else with_ruby="no"; fi])

    if test "$with_ruby" = "yes"; then
      AC_MSG_CHECKING([checking $RUBY_BIN -r rbconfig archdir, cflags])
      if test -z "$RUBY_CFLAGS"; then
        RUBY_CFLAGS=`$RUBY_BIN -r rbconfig -e "printf(\"-I%s %s\", Config::CONFIG@<:@'archdir'@:>@, Config::CONFIG@<:@'CFLAGS'@:>@)"`
      fi
      AC_MSG_RESULT([$RUBY_CFLAGS])

      AC_MSG_CHECKING([checking $RUBY_BIN rbconfig libs])
      if test -z "$RUBY_LDFLAGS"; then
        RUBY_LDFLAGS=`$RUBY_BIN -r rbconfig -e "print Config::CONFIG@<:@'LIBRUBYARG'@:>@"`
      fi
      AC_MSG_RESULT([$RUBY_LDFLAGS])

      AC_AGI_COMPILE([Ruby], [ruby], [$RUBY_CFLAGS], [$RUBY_LDFLAGS],[
#include <ruby.h>
int main(void) {
  /* These supposidly call exit if they fail. */   
  ruby_init();
  ruby_init_loadpath();
  return 0;
}])
    fi
  fi
fi

if test "$agi_with_ruby" = "no" && test "$with_ruby" = "yes"; then
  AC_MSG_WARN([Ruby detected, but it doesn't work...])
  with_ruby="no"
fi

if test "$with_ruby" = "yes"; then
  with_automation="yes"
  AC_DEFINE(WITH_RUBY, 1, [Enable RUBY Automation.])
fi

AC_SUBST(RUBY_CFLAGS)
AC_SUBST(RUBY_LDFLAGS)
AM_CONDITIONAL([HAVE_AUTO4_RUBY], [test "$with_ruby" != "no"])


# Automation setup
if test "$with_automation" = "yes"; then
  AC_DEFINE(WITH_AUTOMATION, 1, [Enable Automation support, requires any automation language.])
fi  
AM_CONDITIONAL([HAVE_AUTOMATION], [test "$with_automation" = "yes"])



################
# Widget support
################
AM_OPTIONS_WXCONFIG
AM_PATH_WXCONFIG(2.8.1, [have_wxconfig=1], [have_wxconfig=0], [std,gl,stc])

if test "$have_wxconfig" != 1; then
  AC_MSG_FAILURE([wxWidgets detection failed, please set --with-wx* or add
the libraries to your LDFLAGS, CXX/CFLAGS.])
fi

aegisub_save_CPPLAGS="$CPPLAGS"
CPPFLAGS="$WX_CFLAGS"

AC_ARG_ENABLE(check-wx-opengl, [--disable-check-wx-opengl
                        Force wxwidgets OpenGL support. ])

if test "$enable_check-wx-opengl" = "yes"; then
  AC_AGI_LINK([wxWidgets OpenGL support], [wxopengl], [wx/glcanvas.h], [$GL_CFLAGS $WX_CFLAGS], [$GL_LIBS $WX_LIBS],[
#include <wx/glcanvas.h>
int main(void) {
  wxGLCanvas *canvas;
  wxGLContext *context;
  return 0;
} ])
fi

if test "$with_agi_wxopengl" = "no" || test "$enable_check-wx-opengl" = "no"; then
  AC_MSG_FAILURE([wxWidgets OpenGL support missing])
fi


AC_ARG_ENABLE(wx-stc, [  --disable-check--wx-stc Force wxwidgets StyledTextCtrl support.])

if test "$enable_check-wx-stc" = "yes"; then
  AC_AGI_LINK([wxWidgets StyledTextCtrl support], [wxstc], [wx/stc/stc.h], [$WX_CFLAGS], [$WX_LIBS],[
#include <wx/stc/stc.h>
int main(void) {
  wxStyledTextCtrl *canvas;
  return 0;
} ])
fi

if test "$with_agi_wxstc" = "no" || test "$enable_check-wx-stc" = "yes"; then
  AC_MSG_FAILURE([wxWidgets StyledTextCtrl support missing])
fi


################################################
# Internationalisation support (keep this last!)
################################################
AC_PROG_INTLTOOL
AM_GLIB_GNU_GETTEXT

GETTEXT_PACKAGE=aegisub
AC_SUBST(GETTEXT_PACKAGE)
AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, "$GETTEXT_PACKAGE",
                   [The prefix for our gettext translation domains.])


AC_OUTPUT([
Makefile
aegisub/Makefile
aegisub/bitmaps/Makefile
aegisub/posix/Makefile
universalchardet/Makefile
auto3/Makefile
libass/Makefile
automation/Makefile
po/Makefile.in
m4macros/Makefile
])


if test -z "$found_audio"; then
  AC_MSG_NOTICE([

***********************************************************************
* No supported audio player interface was found on your system.
* If you want audio support in Aegisub you need to install one of
* these libraries:
*  - PulseAudio
*    * http://pulseaudio.org/
*  - ALSA (Linux only) (Currently broken)
*    * http://www.alsa-project.org/
*  - PortAudio (version 18 only, version 19 is not compatible)
*    * http://www.portaudio.com/
***********************************************************************
  ])
fi

if test -z "$found_video_provider"; then
  AC_MSG_NOTICE([

***********************************************************************
* No supported video/audio reader interface was found on your system.
* You will not be able to open any video or audio files in Aegisub
* unless you install a supported video/audio provider.
* You will however still be able to open "dummy" video, ie. a blank,
* virtual video clip with subtitles overlaid.
* Currently we only support one video/audio provider on non-Windows
* systems:
*  - FFmpeg (libavcodec + libavformat)
*    * http://ffmpeg.mplayerhq.hu/
***********************************************************************
  ])
fi


AC_MSG_RESULT([
Scripting Engines:
  auto4 Perl:            $with_perl $perl_disabled
  auto3:                 $with_auto3 $lua50_disabled
  auto4:                 $with_auto4 $lua51_disabled
  auto4 Ruby:            $with_ruby $ruby_disabled

Audio Players:
  ALSA:                  $with_alsa $alsa_disabled
  OpenAL:                $with_openal $openal_disabled
  PortAudio:             $with_portaudio $portaudio_disabled
  PulseAudio:            $with_pulseaudio $pulseaudio_disabled

Video Providers
  ffmpeg:                $with_ffmpeg $ffmpeg_disabled

Subtitle Providers:
  csri (asa):            $with_csri (requires iconv, fontconfig) $csri_disabled
  libass                 $with_libass (requires iconv, fontconfig) $libass_disabled

Misc Packages:
  hunspell:              $with_hunspell $with_hunspell_version $hunspell_disabled
  universalchardet:      $with_univchardet $univchardet_disabled
]);