Add Libs.private and Requires.private to harfbuzz.pc

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=64501

configure.ac

@@ -145,8 +145,10 @@ AC_ARG_WITH(glib,
 			[Use glib @<:@default=auto@:>@])],,
 	[with_glib=auto])
 have_glib=false
+GLIB_DEPS="glib-2.0 >= 2.16"
+AC_SUBST(GLIB_DEPS)
 if test "x$with_glib" = "xyes" -o "x$with_glib" = "xauto"; then
-	PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.16, have_glib=true, :)
+	PKG_CHECK_MODULES(GLIB, $GLIB_DEPS, have_glib=true, :)
 fi
 if test "x$with_glib" = "xyes" -a "x$have_glib" != "xtrue"; then
 	AC_MSG_ERROR([glib support requested but glib-2.0 not found])
@@ -296,8 +298,10 @@ AC_ARG_WITH(graphite2,
 			[Use the graphite2 library @<:@default=no@:>@])],,
 	[with_graphite2=no])
 have_graphite2=false
+GRAPHITE2_DEPS="graphite2"
+AC_SUBST(GRAPHITE2_DEPS)
 if test "x$with_graphite2" = "xyes" -o "x$with_graphite2" = "xauto"; then
-	PKG_CHECK_MODULES(GRAPHITE2, graphite2, have_graphite2=true, :)
+	PKG_CHECK_MODULES(GRAPHITE2, $GRAPHITE2_DEPS, have_graphite2=true, :)
 fi
 if test "x$with_graphite2" = "xyes" -a "x$have_graphite2" != "xtrue"; then
 	AC_MSG_ERROR([graphite2 support requested but libgraphite2 not found])
@@ -314,9 +318,11 @@ AC_ARG_WITH(freetype,
 			[Use the FreeType library @<:@default=auto@:>@])],,
 	[with_freetype=auto])
 have_freetype=false
+FREETYPE_DEPS="freetype2 >= 12.0.6"
+AC_SUBST(FREETYPE_DEPS)
 if test "x$with_freetype" = "xyes" -o "x$with_freetype" = "xauto"; then
 	# See freetype/docs/VERSION.DLL; 12.0.6 means freetype-2.4.2
-	PKG_CHECK_MODULES(FREETYPE, freetype2 >= 12.0.6, have_freetype=true, :)
+	PKG_CHECK_MODULES(FREETYPE, $FREETYPE_DEPS, have_freetype=true, :)
 fi
 if test "x$with_freetype" = "xyes" -a "x$have_freetype" != "xtrue"; then
 	AC_MSG_ERROR([FreeType support requested but libfreetype2 not found])

src/Makefile.am

@@ -20,6 +20,8 @@ lib_LTLIBRARIES = libharfbuzz.la
 
 HBCFLAGS =
 HBLIBS =
+HBNONPCLIBS =
+HBDEPS =
 HBSOURCES =  \
 	hb-atomic-private.hh \
 	hb-blob.cc \
@@ -133,12 +135,13 @@ endif
 
 if HAVE_PTHREAD
 HBCFLAGS += $(PTHREAD_CFLAGS)
-HBLIBS   += $(PTHREAD_LIBS)
+HBNONPCLIBS += $(PTHREAD_LIBS)
 endif
 
 if HAVE_GLIB
 HBCFLAGS += $(GLIB_CFLAGS)
 HBLIBS   += $(GLIB_LIBS)
+HBDEPS   += $(GLIB_DEPS)
 HBSOURCES += hb-glib.cc
 HBHEADERS += hb-glib.h
 endif
@@ -146,6 +149,7 @@ endif
 if HAVE_FREETYPE
 HBCFLAGS += $(FREETYPE_CFLAGS)
 HBLIBS   += $(FREETYPE_LIBS)
+HBDEPS   += $(FREETYPE_DEPS)
 HBSOURCES += hb-ft.cc
 HBHEADERS += hb-ft.h
 endif
@@ -153,20 +157,21 @@ endif
 if HAVE_GRAPHITE2
 HBCFLAGS += $(GRAPHITE2_CFLAGS)
 HBLIBS   += $(GRAPHITE2_LIBS)
+HBDEPS   += $(GRAPHITE2_DEPS)
 HBSOURCES += hb-graphite2.cc
 HBHEADERS += hb-graphite2.h
 endif
 
 if HAVE_UNISCRIBE
 HBCFLAGS += $(UNISCRIBE_CFLAGS)
-HBLIBS   += $(UNISCRIBE_LIBS)
+HBNONPCLIBS += $(UNISCRIBE_LIBS)
 HBSOURCES += hb-uniscribe.cc
 HBHEADERS += hb-uniscribe.h
 endif
 
 if HAVE_CORETEXT
 HBCFLAGS += $(CORETEXT_CFLAGS)
-HBLIBS   += $(CORETEXT_LIBS)
+HBNONPCLIBS += $(CORETEXT_LIBS)
 HBSOURCES += hb-coretext.cc
 HBHEADERS += hb-coretext.h
 endif
@@ -182,6 +187,8 @@ DIST_SUBDIRS += hb-ucdn
 
 # Put the library together
 
+HBLIBS += $(HBNONPCLIBS)
+
 if OS_WIN32
 export_symbols = -export-symbols harfbuzz.def
 harfbuzz_def_dependency = harfbuzz.def
@@ -256,6 +263,8 @@ EXTRA_DIST += \
 		-e 's@%exec_prefix%@$(exec_prefix)@g' \
 		-e 's@%libdir%@$(libdir)@g' \
 		-e 's@%includedir%@$(includedir)@g' \
+		-e 's@%libs_private%@$(HBNONPCLIBS)@g' \
+		-e 's@%requires_private%@$(HBDEPS)@g' \
 		-e 's@%VERSION%@$(VERSION)@g' \
 	"$<" > "$@" \
 	|| ($(RM) "$@"; false)

src/harfbuzz.pc.in

@@ -8,4 +8,6 @@ Description: HarfBuzz text shaping library
 Version: %VERSION%
 
 Libs: -L${libdir} -lharfbuzz
+Libs.private: %libs_private%
+Requires.private: %requires_private%
 Cflags: -I${includedir}/harfbuzz