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([libass_required_version], [0.9.1])
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


########################
# Configurable variables
########################
aegisubdatadir="$datadir/aegisub/2.1"
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



###################################################
# 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])])




#################
# Audio Providers
#################

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"])

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

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"])

AC_ARG_WITH(pulseaudio,[  --without-pulseaudio    build without PulseAudio audio provider.
                          (default: auto)], pulseaudio_disabled="(disabled)")
if test "x$with_pulseaudio" != xno; then
  PKG_CHECK_MODULES(LIBPULSE, libpulse >= 0.5, [found_audio=yes; with_pulseaudio=yes], [with_pulseaudio=no])
fi
AM_CONDITIONAL([HAVE_PULSEAUDIO], [test "$with_pulseaudio" != "no"])
if test "$with_pulseaudio" == no; then
  AC_DEFINE(WITH_PULSEAUDIO, 1, [Enable PulseAudio support])
fi

AC_ARG_WITH(openal,[  --without-openal    build without OpenAL audio provider.
                          (default: auto)], openal_disabled="(disabled)")
if test "x$with_openal" != xno; then
  PKG_CHECK_MODULES(OPENAL, libpulse >= 0.0.8, [found_audio=yes; with_openal=yes], [with_openal=no])
fi
AM_CONDITIONAL([HAVE_OPENAL], [test "$with_openal" != "no"])
if test "$with_openal" == no; 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=no])
  AC_CHECK_LIB([avformat], [av_read_frame],AVFORMAT_LDFLAGS="-lavformat", [with_ffmpeg=no])
  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 "$with_swscale" = "yes" || test "$with_swscale_lib" = "yes"; then
    with_ffmpeg="yes";
  else 
    with_ffmpeg="no";
  fi

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

AC_SUBST(SWSCALE_LDFLAGS)
AC_SUBST(AVCODEC_LDFLAGS)
AC_SUBST(AVFORMAT_LDFLAGS)
AM_CONDITIONAL([HAVE_FFMPEG], [test "$with_ffmpeg" != "no"])




###################
# Subtitle Provider
###################
AC_ARG_WITH(libass, [  --without-libass        disable libass (default=autodetect)],libass_disabled="(disabled)")

if test "x$with_libass" != xno; then
  PKG_CHECK_MODULES(LIBASS, libass >= 0.9.1)

  aegisub_save_LDFLAGS="$LDFLAGS"
  LDFLAGS="$LIBASS_LIBS"
  AC_CHECK_LIB([ass], [ass_read_styles],[LIBASS_LIBS="$LIBASS_LIBS]", with_libass=no)
  LDFLAGS="$aegisub_save_LDFLAGS"

  aegisub_save_CPPFLAGS="$CPPFLAGS"
  CPPFLAGS="$LIBASS_CFLAGS"
  AC_CHECK_HEADER([ass/ass.h],[LIBASS_CFLAGS="$LIBASS_CFLAGS"],with_libass="no")
  CPPFLAGS="$aegisub_save_CPPFLAGS"
fi

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

AC_SUBST(LIBASS_LIBS)
AC_SUBST(LIBASS_CFLAGS)

AM_CONDITIONAL([HAVE_LIBASS], [test "$with_libass" != "no" ])



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

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

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])])

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


AC_ARG_WITH(hunspell, [  --without-hunspell      build without hunspell support], alsa_disabled="(disabled)")
if test "x$with_hunspell" != xno; then
  AC_CHECK_LIB([hunspell], [main],[HUNSPELL_LDFLAGS="-lhunspell"; with_hunspell="yes"], [with_hunspell=no])
fi

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

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




############
# Automation
############
AC_ARG_WITH(lua,
[  --without-lua           build without lua 5.1 (auto3)], [lua_disabled="(disabled)"])

AC_ARG_WITH(lua-lib,
[  --with-lua-lib=PREFIX   PATH location of lua 5.1 library], [lua_lib_dir="-L$withval"])

AC_ARG_WITH(lua-include,
[  --with-lua-include=PREFIX
                          PATH location of lua 5.1 includes], [lua_include_dir="-I$withval"])

if test "$with_lua" != no; then
  aegisub_save_LDFLAGS="$LDFLAGS"
  
  LDFLAGS="$LDFLAGS $lua_lib_dir"
  AC_CHECK_LIB([lua], [lua_call], LUA_LDFLAGS="$lua_lib_dir -llua", with_lua_lib="no")
  LDFLAGS="$aegisub_save_LDFLAGS"

  aegisub_save_CPPFLAGS="$CPPFLAGS"
  CPPFLAGS="$CPPFLAGS $lua_include_dir"
  AC_CHECK_HEADER([lua.h],[LUA_CPPFLAGS="$lua_include_dir"], with_lua_include="no")
  CPPFLAGS="$aegisub_save_CPPFLAGS"

fi

if (test "$with_lua_lib" != "no" || ! test "$have_lua_include" != "no") && test "$with_lua" != "no"; then
  with_auto4="yes"
  AC_DEFINE(WITH_AUTOMATION, 1, [Enable Automation (auto4), requires lua])
else
  with_auto4="no"
fi

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


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"])

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_MSG_CHECKING([checking for perl version >= 5.004])
    if $PERL_BIN -e 'require 5.004'; then
      AC_MSG_RESULT([yes])
      with_perl=yes
      AC_DEFINE(WITH_PERL, 1, [Enable PERL support.])
      AC_MSG_CHECKING([checking $PERL_BIN clfags])
      PERL_CFLAGS=`$PERL_BIN -MExtUtils::Embed -eccflags -eperl_inc`
      AC_MSG_RESULT([$PERL_CFLAGS])

      AC_MSG_CHECKING([checking $PERL_BIN libs])
      PERL_LDFLAGS=`$PERL_BIN -MExtUtils::Embed -eldopts`
      AC_MSG_RESULT([$PERL_LDFLAGS])

    else
      AC_MSG_RESULT([yes])
      with_perl=no
    fi
  fi
fi

AC_SUBST(PERL_CFLAGS)
AC_SUBST(PERL_LDFLAGS)

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


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"])

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_MSG_CHECKING([checking for ruby version >= 1.8])
    if $RUBY_BIN -r rbconfig -e 'if Config::CONFIG@<:@"ruby_version"@:>@.to_f >= 1.8  then exit(0) else exit(1) end' ; then
      AC_MSG_RESULT([yes])
      with_ruby=yes
      AC_DEFINE(WITH_RUBY, 1, [Enable RUBY Automation.])

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

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

    else
      AC_MSG_RESULT([yes])
      with_ruby=no
    fi
  fi
fi

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


AC_ARG_WITH(lua50-lib,
[  --with-lua50-lib=PREFIX PATH location of lua 5.0 library
                          (required for auto3 support)], [lua50_lib_dir="-L$withval"])
AC_ARG_WITH(lua50-include,
[  --with-lua50-include=PREFIX
                          PATH location of lua 5.0 includes
                          (required for auto3 support)], [lua50_include_dir="-I$withval"])


#if test -z "$lua50-lib-dir"; then
#  AC_MSG_WARN([You must supply both --with-lua50-lib AND --with-lua50-include.])
#fi

if ! test -z "$lua50_lib_dir" && ! test -z "$lua50_include_dir"; then
  aegisub_save_LDFLAGS="$LDFLAGS"
  LDFLAGS="-L$lua50_lib_dir"
  AC_CHECK_LIB([lua], [lua_call],[LUA50_LDFLAGS="$lua50_lib_dir -llua"; lua50_lib="yes"], [lua50_lib="no"])
  LDFLAGS="$aegisub_save_LDFLAGS"

  aegisub_save_CPPFLAGS="$CPPFLAGS"
  CPPFLAGS="-I$lua50_include_dir"
  AC_CHECK_HEADER([lua.h],[LUA50_CPPFLAGS="$lua50_include_dir"; lua50_include="yes"],[lua50_include="no"])
  CPPFLAGS="$aegisub_save_CPPFLAGS"
fi

if test "$lua50_lib" = "yes" && test "$lua50_include" = "yes"; then
 with_auto3="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_CPPFLAGS)
AC_SUBST(LUA50_LDFLAGS)




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

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


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

AC_MSG_CHECKING([wxWidgets OpenGL support])
AC_TRY_COMPILE([#include <wx/glcanvas.h>],
  [wxGLCanvas *canvas;],
  with_wxgl=yes, with_wxgl=no)
AC_MSG_RESULT($with_wxgl)

if test "$with_wxgl" = "no"; then
  AC_MSG_FAILURE([wxWidgets OpenGL support missing])
fi

AC_MSG_CHECKING([wxWidgets StyledTextCtrl support])
AC_TRY_COMPILE([#include <wx/stc/stc.h>],
  [wxStyledTextCtrl *canvas;],
  with_wxstc=yes, with_wxstc=no)
AC_MSG_RESULT($with_wxstc)

if test "$with_wxstc" = "no"; then
  AC_MSG_FAILURE([wxWidgets missing StyledTextCtrl])
fi

CPPFLAGS="$aegisub_save_CPPFLAGS"




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

GETTEXT_PACKAGE=aegisub21
AC_SUBST(GETTEXT_PACKAGE)
AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, "$GETTEXT_PACKAGE",
                   [The prefix for our gettext translation domains.])


AC_OUTPUT([
	Makefile
	auto3/Makefile
	automation/Makefile
	po/Makefile.in
	aegisub/Makefile
	aegisub/bitmaps/Makefile
	aegisub/posix/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
  auto4:                 $with_auto4 $lua_disabled
  auto4 Ruby:            $with_ruby $ruby_disabled

Audio Providers:
  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:
  asa:                   $with_asa
  libass:                $with_libass
]);