AC_PREREQ(2.57)
AC_INIT([Aegisub], [2.00-alpha],, [aegisub])
AC_CONFIG_AUX_DIR([ac])
AC_CONFIG_SRCDIR([aegisub/main.cpp])
AM_INIT_AUTOMAKE
AC_CONFIG_HEADER([aegisub/posix/acconf.h])
AC_GNU_SOURCE
AM_GNU_GETTEXT([external])
AM_GNU_GETTEXT_VERSION([0.14.5])

AC_CANONICAL_HOST

# --enable-lemming: make errors non-fatal. to be used for
# creating dist packages on boxes without X11. intentionally
# not appearing in --help :)
ignore_failure=""
AC_ARG_ENABLE([lemming], [], [ignore_failure="$enableval"])
AC_DEFUN([AC_MSG_XFAILURE], [{
	if test "$ignore_failure" == "yes"
	then	AC_MSG_WARN([$1])
	else	AC_MSG_FAILURE([$1])
	fi
}])

dnl Checks for programs.
CHECK_GNU_MAKE
AC_PROG_CC
AC_PROG_CXX
AC_LANG(C++)
AC_PROG_LIBTOOL

AC_PATH_PROGS(CONVERT, [convert], [])
if test -z "$CONVERT"; then
	AC_MSG_XFAILURE([Aegisub needs convert (from ImageMagick) to produce xpms from the supplied bitmaps/icons])
fi

ACX_PTHREAD([], [
	AC_MSG_XFAILURE([Aegisub needs pthreads])
])
AC_MSG_CHECKING([whether pthreads works])
AC_COMPILE_IFELSE([
#include <stdlib.h>
#include <pthread.h>
int main() { return 0; }
], [
	AC_MSG_RESULT([yes])
], [
	AC_MSG_RESULT([no])
	echo <<EOM
***********************************************************************
* Your pthreads installation seems to be broken.
* Apart from obviously being bad, this can cause strange detection
* errors as well.
* On some Linux distributions, this can be caused by having the package
* libpthread-dev installed. If you have this package, please uninstall
* it now.
***********************************************************************
EOM
	AC_MSG_XFAILURE([You need a working pthreads installation.])
])


AC_CHECK_LIB([asound], [snd_pcm_open], [LIBS="-lasound $LIBS"; found_audio=yes], [with_alsa=no])
AC_CHECK_LIB([portaudio], [Pa_Initialize], [LIBS="-lportaudio $LIBS";found_audio=yes], [with_portaudio=no])
AC_CHECK_FUNCS([Pa_GetStreamTime])
PKG_CHECK_MODULES([LIBPULSE], libpulse >= 0.5, [found_audio=yes], [with_pulseaudio=no])
AC_CHECK_LIB([avcodec], [avcodec_init],, [with_ffmpeg=no])
AC_CHECK_LIB([avformat], [av_read_frame],, [with_ffmpeg=no])
AC_CHECK_LIB([swscale], [sws_scale],, [with_ffmpeg=no])
if test "$with_ffmpeg" != "no"; then
	found_video_provider=yes
fi
AC_CHECK_LIB([hunspell], [main],, [with_hunspell=no])
AC_CHECK_LIB([ruby1.9], [ruby_init],, [with_ruby=no])

dnl Perl engine
AC_ARG_ENABLE([auto4-perl],
	[AS_HELP_STRING([--enable-auto4-perl],[enable automation4 perl engine (under development)@<:@default=no@:>@])],,
	[enable_auto4_perl=no])
if test "$enable_auto4_perl" != "no"; then
	echo -n 'checking for perl version >= 5.004... '
	if perl -e 'require 5.004'; then
		enable_auto4_perl=yes
		echo 'yes'
	else
		enable_auto4_perl=no
	fi
fi


AC_CHECK_HEADER([wchar.h],,[
	AC_MSG_XFAILURE([aegisub needs wide character support, find a wchar.h])
])
PKG_CHECK_MODULES([FREETYPE], freetype2 >= 9.7.0,, [
	AC_MSG_XFAILURE([aegisub needs FreeType2 2.1.9, go install it])
])

AX_CHECK_GL
if test ! "$GL_LIBS"; then
	AC_MSG_WARN([Could not find system GL library])
	AC_MSG_XFAILURE([GL support is required to build Aegisub. (Try mesa3d)])
fi
CPPFLAGS="$CPPFLAGS $GL_CFLAGS"
LIBS="$LIBS $GL_LIBS"

AM_OPTIONS_WXCONFIG
AM_PATH_WXCONFIG(2.8.1, [has_wxconfig=1], [has_wxconfig=0], [std,gl,stc])
if test "$has_wxconfig" != 1; then
	echo <<EOM
wxWidgets must be installed on your system
but wx-config script couldn't be found.

Please check that wx-config is in path, the directory
where wxWidgets libraries are installed (returned by
'wx-config --libs' command) is in LD_LIBRARY_PATH or
equivalent variable and wxWidgets version is 2.8.1 or above.

Also, make sure you have the STC (StyledTextCtrl) module
installed. It is shipped with wxWidgets under the contrib
directory, but not built by default.
EOM
	AC_MSG_XFAILURE([wxWidgets detection failed.])
fi

CPPFLAGS="$CPPFLAGS $WX_CPPFLAGS $FREETYPE_CFLAGS $LIBPULSE_CFLAGS"
LIBS="$LIBS $WX_LIBS $FREETYPE_LIBS $LIBPULSE_LIBS"

AC_MSG_CHECKING([wxWidgets OpenGL support])
AC_LINK_IFELSE([
#include <wx/glcanvas.h>
int main(int argc, char **argv) {
	wxGLCanvas *canvas;
	return 0;
}
],[
	AC_MSG_RESULT([yes])
],[
	AC_MSG_RESULT([not available])
	AC_MSG_XFAILURE([wxWidgets OpenGL support missing])
])

AC_MSG_CHECKING([wxWidgets StyledTextCtrl support])
AC_LINK_IFELSE([
#include <wx/stc/stc.h>
int main(int argc, char **argv) {
	wxStyledTextCtrl *canvas;
	return 0;
}
],[
	AC_MSG_RESULT([yes])
],[
	AC_MSG_RESULT([not available])
	AC_MSG_XFAILURE([wxWidgets missing StyledTextCtrl])
])

AC_CHECK_LIB([m], [main])
AC_CHECK_LIB([dl], [dlopen])

AC_ARG_WITH([libass], [AS_HELP_STRING([--without-libass],[disable libass @<:@default=check@:>@])],[],[with_libass=check])

AS_IF([test "x$with_libass" != xno], [
	PKG_CHECK_MODULES([LIBASS], libass >= 0.9.1, [
		CPPFLAGS="$CPPFLAGS $LIBASS_CFLAGS"
		LIBS="$LIBS $LIBASS_LIBS"
		AC_DEFINE(HAVE_LIBASS, 1, [found libass via pkg-config])
		AC_CHECK_HEADERS([ass/ass.h], [
			with_libass=yes
		], [	if test "x$with_libass" != xcheck
			then	AC_MSG_XFAILURE([--with-libass given, but libass headers not found])
			fi
			with_libass=no
		])
	], [	if test "x$with_libass" != xcheck
		then	AC_MSG_XFAILURE([--with-libass given, but libass pkgconfig module found])
		fi
		with_libass=no
	])
])

AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE

AC_PROG_INSTALL

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])])

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])


AC_PATH_XTRA

AC_HEADER_STDC
AC_HEADER_STDBOOL

AC_CONFIG_SUBDIRS([csri])

AM_CONDITIONAL([USE_LIBASS], [test "$with_libass" != "no" ])
AM_CONDITIONAL([HAVE_ALSA], [test "$with_alsa" != "no"])
AM_CONDITIONAL([HAVE_PORTAUDIO], [test "$with_portaudio" != "no"])
AM_CONDITIONAL([HAVE_PULSEAUDIO], [test "$with_pulseaudio" != "no"])
AM_CONDITIONAL([HAVE_HUNSPELL], [test "$with_hunspell" != "no"])
AM_CONDITIONAL([HAVE_FFMPEG], [test "$with_ffmpeg" != "no"])
dnl FIXME: These three should probably get proper --with flags,
dnl and Ruby also keep its detection (warn/fail if you have --with-ruby
dnl but the lib isn't detected.)
AM_CONDITIONAL([WITH_AUTO4_PERL], [test "$enable_auto4_perl" != "no"])
AM_CONDITIONAL([WITH_AUTO4_RUBY], [test "$with_ruby" != "no"])
AM_CONDITIONAL([WITH_AUTO4_LUA], [true])
dnl TODO: Make the auto3 lib build on non-Win32 so this can be true
AM_CONDITIONAL([WITH_AUTO3], [true])

AC_OUTPUT([
	Makefile
	ac/Makefile
	auto3/Makefile
	automation/Makefile
	po/Makefile.in
	aegisub/Makefile
	aegisub/bitmaps/Makefile
	aegisub/posix/Makefile
])

if test -z "$found_audio"; then
	echo <<EOM
***********************************************************************
* 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/
***********************************************************************
EOM
fi

if test -z "$found_video_provider"; then
	echo <<EOM
***********************************************************************
* 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/
***********************************************************************
EOM
fi