Update Makefile to build without glib
diff --git a/src/Makefile.am b/src/Makefile.am
index 707dd4c..72439e5 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -13,8 +13,6 @@
 	hb-buffer-private.h \
 	hb-font.cc \
 	hb-font-private.h \
-	hb-glib.h \
-	hb-glib.c \
 	hb-private.h \
 	hb-shape.h \
 	hb-shape.c \
@@ -32,7 +30,6 @@
 	hb-ot-layout-private.h \
 	hb-object-private.h \
 	$(NULL)
-
 HBHEADERS = \
 	hb.h \
 	hb-blob.h \
@@ -43,6 +40,15 @@
 	hb-ot-layout.h \
 	$(NULL)
 
+if HAVE_GLIB
+HBSOURCES += \
+	hb-glib.c \
+	$(NULL)
+HBHEADERS += \
+	hb-glib.h \
+	$(NULL)
+endif
+
 libharfbuzz_la_SOURCES = $(HBSOURCES) $(HBHEADERS)
 libharfbuzz_la_CPPFLAGS = -DHAVE_GLIB $(GLIB_CFLAGS)
 libharfbuzz_la_LIBADD = $(GLIB_LIBS)