[cogl] build: only have libcogl-pango depend on pango

[Robert Bragg <rbragg src gnome org>]

commit 5012bcf1d1fb09a0bece1e3d417ed7c4e3d6cd0c
Author: Robert Bragg <robert linux intel com>
Date:   Tue Aug 2 14:14:06 2011 +0100

    build: only have libcogl-pango depend on pango
    
    Only cogl-pango needs a dependency on pangocairo so we are now careful to
    separate the pangocairo pkg-config flags from the others so we can avoid
    having libcogl builds refer to them.
    
    Reviewed-by: Neil Roberts <neil linux intel com>

 cogl-pango/Makefile.am      |    6 +++---
 cogl-pango/cogl-pango.pc.in |    2 +-
 configure.ac                |    6 +++++-
 examples/Makefile.am        |    1 +
 4 files changed, 10 insertions(+), 5 deletions(-)
---
diff --git a/cogl-pango/Makefile.am b/cogl-pango/Makefile.am
index 9805c58..9f0525e 100644
--- a/cogl-pango/Makefile.am
+++ b/cogl-pango/Makefile.am
@@ -27,9 +27,9 @@ source_h_priv = \
 lib_LTLIBRARIES = libcogl-pango.la
 
 libcogl_pango_la_SOURCES = $(source_c) $(source_h) $(source_h_priv)
-libcogl_pango_la_CFLAGS = $(COGL_DEP_CFLAGS) $(COGL_EXTRA_CFLAGS) $(MAINTAINER_CFLAGS)
+libcogl_pango_la_CFLAGS = $(COGL_DEP_CFLAGS) $(COGL_PANGO_DEP_CFLAGS) $(COGL_EXTRA_CFLAGS) $(MAINTAINER_CFLAGS)
 libcogl_pango_la_LIBADD = $(top_builddir)/cogl/libcogl.la
-libcogl_pango_la_LIBADD += $(COGL_DEP_LIBS) $(COGL_EXTRA_LDFLAGS)
+libcogl_pango_la_LIBADD += $(COGL_DEP_LIBS) $(COGL_PANGO_DEP_LIBS) $(COGL_EXTRA_LDFLAGS)
 libcogl_pango_la_LDFLAGS = \
 	-export-dynamic \
 	-export-symbols-regex "^cogl_pango_.*"
@@ -70,7 +70,7 @@ CoglPango_1_0_gir_NAMESPACE = CoglPango
 CoglPango_1_0_gir_VERSION = 1.0
 CoglPango_1_0_gir_LIBS = libcogl-pango.la
 CoglPango_1_0_gir_FILES = $(source_h) $(source_c)
-CoglPango_1_0_gir_CFLAGS = $(INCLUDES) $(AM_CPPFLAGS) $(COGL_DEP_CFLAGS)
+CoglPango_1_0_gir_CFLAGS = $(INCLUDES) $(AM_CPPFLAGS) $(COGL_DEP_CFLAGS) $(COGL_PANGO_DEP_CFLAGS)
 CoglPango_1_0_gir_INCLUDES = Pango-1.0 PangoCairo-1.0
 CoglPango_1_0_gir_EXPORT_PACKAGES = cogl-pango-1.0
 CoglPango_1_0_gir_SCANNERFLAGS = \
diff --git a/cogl-pango/cogl-pango.pc.in b/cogl-pango/cogl-pango.pc.in
index 0907510..4db8f34 100644
--- a/cogl-pango/cogl-pango.pc.in
+++ b/cogl-pango/cogl-pango.pc.in
@@ -3,7 +3,7 @@ exec_prefix= exec_prefix@
 libdir= libdir@
 includedir= includedir@
 apiversion= COGL_API_VERSION@
-requires= COGL_PKG_REQUIRES@
+requires= COGL_PKG_REQUIRES@ @COGL_PANGO_PKG_REQUIRES@
 
 Name: Cogl
 Description: An pango integration library for Cogl
diff --git a/configure.ac b/configure.ac
index 0efb953..05d55d8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -345,7 +345,7 @@ AM_CONDITIONAL([BUILD_COGL_PANGO], [test "x$enable_cogl_pango" = "xyes"])
 
 AS_IF([test "x$enable_cogl_pango" = "xyes"],
       [
-	COGL_PKG_REQUIRES="$COGL_PKG_REQUIRES pangocairo >= pangocairo_req_version"
+	COGL_PANGO_PKG_REQUIRES="$COGL_PANGO_PKG_REQUIRES pangocairo >= pangocairo_req_version"
       ]
 )
 
@@ -885,6 +885,8 @@ if test -n "$COGL_PKG_REQUIRES_GL"; then
   COGL_DEP_CFLAGS="$COGL_DEP_CFLAGS $COGL_DEP_CFLAGS_GL"
   COGL_DEP_LIBS="$COGL_DEP_LIBS $gl_libs"
 fi
+AC_SUBST(COGL_PANGO_PKG_REQUIRES)
+PKG_CHECK_MODULES(COGL_PANGO_DEP, [$COGL_PANGO_PKG_REQUIRES])
 
 dnl ================================================================
 dnl Misc program dependencies.
@@ -940,6 +942,8 @@ AC_DEFINE([COGL_ENABLE_EXPERIMENTAL_2_0_API], [1],
 
 AC_SUBST(COGL_DEP_CFLAGS)
 AC_SUBST(COGL_DEP_LIBS)
+AC_SUBST(COGL_PANGO_DEP_CFLAGS)
+AC_SUBST(COGL_PANGO_DEP_LIBS)
 AC_SUBST(COGL_EXTRA_CFLAGS)
 AC_SUBST(COGL_EXTRA_LDFLAGS)
 
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 4f02ccf..0dde679 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -29,6 +29,7 @@ if BUILD_COGL_PANGO
 noinst_PROGRAMS += crate
 crate_SOURCES = crate.c
 crate_LDADD = $(common_ldadd) $(top_builddir)/cogl-pango/libcogl-pango.la
+crate_CFLAGS = $(AM_CFLAGS) $(COGL_PANGO_DEP_CFLAGS)
 endif
 
 if X11_TESTS