glusterfs-api.pc: pkgconfig for API consumers

Change-Id: I08c60ff9ec5d336077c39f903720f8850d4ddc72
BUG: 839950
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.com/3665
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>

Makefile.am

@@ -1,8 +1,14 @@
-EXTRA_DIST = autogen.sh COPYING-GPLV2 COPYING-LGPLV3 INSTALL README AUTHORS THANKS NEWS glusterfs.spec
+EXTRA_DIST = autogen.sh \
+	COPYING-GPLV2 COPYING-LGPLV3 \
+	INSTALL README AUTHORS THANKS NEWS \
+	glusterfs.spec glusterfs-api.pc.in
 
 SUBDIRS = argp-standalone libglusterfs rpc api xlators glusterfsd \
 	$(FUSERMOUNT_SUBDIR) doc extras cli
 
+pkgconfigdir = @pkgconfigdir@
+pkgconfig_DATA = glusterfs-api.pc
+
 CLEANFILES =
 
 gitclean: distclean

configure.ac

@@ -142,6 +142,7 @@ AC_CONFIG_FILES([Makefile
                 xlators/mgmt/Makefile
                 xlators/mgmt/glusterd/Makefile
                 xlators/mgmt/glusterd/src/Makefile
+		glusterfs-api.pc
 		api/Makefile
 		api/src/Makefile
 		glusterfs.spec])
@@ -151,6 +152,12 @@ AC_CANONICAL_HOST
 AC_PROG_CC
 AC_PROG_LIBTOOL
 
+AC_ARG_WITH(pkgconfigdir,
+            [  --with-pkgconfigdir=DIR      pkgconfig file in DIR @<:@LIBDIR/pkgconfig@:>@],
+            [pkgconfigdir=$withval],
+            [pkgconfigdir='${libdir}/pkgconfig'])
+AC_SUBST(pkgconfigdir)
+
 AC_ARG_WITH(mountutildir,
             [  --with-mountutildir=DIR mount helper utility in DIR @<:@/sbin@:>@],
             [mountutildir=$withval],

glusterfs-api.pc.in

@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+
+Name: glusterfs-api
+Description: GlusterFS API
+Version: @VERSION@
+Libs: -Wl,-R${libdir} -L${libdir} -lgfapi -lglusterfs -lgfrpc -lgfxdr
+Cflags: -I${includedir}/glusterfs -D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64