From 5b0255a59dce7be634bcc6e89711e7570f42f9aa Mon Sep 17 00:00:00 2001
From: David Lamparter <equinox@diac24.net>
Date: Wed, 4 Apr 2007 19:40:06 +0000
Subject: [PATCH] check for libass / add --with[out]-libass parameter to
 configure

Originally committed to SVN as r1006.
---
 aegisub/Makefile.am | 11 +++++++++--
 configure.ac        | 28 ++++++++++++++++++++++------
 2 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/aegisub/Makefile.am b/aegisub/Makefile.am
index bf7ca3d27..cb408a364 100644
--- a/aegisub/Makefile.am
+++ b/aegisub/Makefile.am
@@ -1,4 +1,5 @@
-EXTRA_DIST = res.rc $(srcdir)/*.h
+EXTRA_DIST = res.rc $(srcdir)/*.h \
+	subtitles_provider_libass.cpp
 SUFFIXES = .c .cpp .rc
 
 SUBDIRS = bitmaps posix
@@ -13,6 +14,12 @@ BUILDINFO := -DBUILD_CREDIT="\"$(shell whoami)\"" $(REVISION)
 AM_CPPFLAGS = -DAEGISUB -Iposix -include posix/defines.h $(BUILDINFO)
 LDADD = posix/libposix.a ../lua51/src/liblua.a ../FexTrackerSource/libfex.a ../csri/lib/.libs/libcsri.a -lGL -lGLU
 
+if USE_LIBASS
+LIBASS=subtitles_provider_libass.cpp
+else
+LIBASS=
+endif
+
 #	auto4_ruby_assfile.cpp
 #	auto4_ruby.cpp
 #	auto4_ruby_dialog.cpp
@@ -111,7 +118,7 @@ aegisub_SOURCES = \
 	subtitle_format_txt.cpp \
 	subtitles_provider.cpp \
 	subtitles_provider_csri.cpp \
-	subtitles_provider_libass.cpp \
+	$(LIBASS) \
 	text_file_reader.cpp \
 	text_file_writer.cpp \
 	thesaurus.cpp \
diff --git a/configure.ac b/configure.ac
index 2a87c9d85..4ba1636c0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -127,12 +127,26 @@ AC_CHECK_LIB([portaudio], [Pa_Initialize],, [AC_MSG_ERROR([portaudio not found.]
 AC_CHECK_LIB([avcodec], [avcodec_init])
 AC_CHECK_LIB([avformat], [av_read_frame])
 
-PKG_CHECK_MODULES([LIBASS], libass >= 0.9.1, [
-	CPPFLAGS="$CPPFLAGS $LIBASS_CFLAGS"
-	LIBS="$LIBS $LIBASS_LIBS"
-	AC_DEFINE(HAVE_LIBASS, 1, [found libass via pkg-config])
-], [true])
-AC_CHECK_HEADERS([ass/ass.h])
+AC_ARG_WITH([libass], [AS_HELP_STRING([--without-libass],[disable libass @<:@default=check@:>@])],[],[with_libass=check])
+
+AS_IF([test "x$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_FAILURE([--with-libass given, but libass headers not found])
+			fi
+			with_libass=no
+		])
+	], [	if test "x$with_libass" != xcheck
+		then	AC_MSG_FAILURE([--with-libass given, but libass pkgconfig module found])
+		fi
+		with_libass=no
+	])
+])
 
 PKG_CHECK_MODULES([GLIB], glib-2.0, [
 	CPPFLAGS="$CPPFLAGS $GLIB_CFLAGS"
@@ -179,6 +193,8 @@ AC_HEADER_STDBOOL
 
 AC_CONFIG_SUBDIRS([csri])
 
+AM_CONDITIONAL([USE_LIBASS], [test "$with_libass" != "no" ])
+
 AC_OUTPUT([
 	Makefile
 	ac/Makefile