add pkg-config support

git-svn-id: http://svn.xiph.org/trunk/ao@5329 0101bb08-14d6-0310-b084-bc0e0c8e3800

Makefile.am

@@ -6,10 +6,14 @@ SUBDIRS = src include doc debian
 
 m4datadir = $(datadir)/aclocal
 m4data_DATA = ao.m4
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = ao.pc
+
 mandir = @MANDIR@
 man_MANS = libao.conf.5
 
-EXTRA_DIST = README AUTHORS CHANGES COPYING libao.spec ao.m4 acinclude.m4 $(man_MANS)
+EXTRA_DIST = README AUTHORS CHANGES COPYING libao.spec ao.m4 acinclude.m4 ao.pc.in $(man_MANS)
 
 debug:
 	$(MAKE) all CFLAGS="@DEBUG@"

ao.pc.in

+# libao pkg-config source file
+
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: ao
+Description: ao is a cross-platform audio output library
+Version: @VERSION@
+Requires:
+Conflicts:
+Libs: -L${libdir} -lao
+Cflags: -I${includedir}

configure.in

@@ -354,4 +354,4 @@ dnl Plugins get special LDFLAGS
 AC_SUBST(PLUGIN_LDFLAGS)
 
 
-AC_OUTPUT(Makefile src/Makefile doc/Makefile include/Makefile include/ao/Makefile include/ao/os_types.h src/plugins/Makefile src/plugins/esd/Makefile src/plugins/oss/Makefile src/plugins/alsa/Makefile src/plugins/alsa09/Makefile src/plugins/sun/Makefile src/plugins/irix/Makefile src/plugins/arts/Makefile src/plugins/macosx/Makefile src/plugins/nas/Makefile debian/Makefile)
+AC_OUTPUT(Makefile src/Makefile doc/Makefile include/Makefile include/ao/Makefile include/ao/os_types.h src/plugins/Makefile src/plugins/esd/Makefile src/plugins/oss/Makefile src/plugins/alsa/Makefile src/plugins/alsa09/Makefile src/plugins/sun/Makefile src/plugins/irix/Makefile src/plugins/arts/Makefile src/plugins/macosx/Makefile src/plugins/nas/Makefile debian/Makefile ao.pc)