[grilo] build: Add libtool version information

[Juan A. Suarez Romero <jasuarez src gnome org>]

commit 0de56ce6677d8572c53e7cedc6bbaeb0d4175d82
Author: Juan A. Suarez Romero <jasuarez igalia com>
Date:   Mon Aug 13 08:14:25 2012 +0000

    build: Add libtool version information

 configure.ac         |   13 +++++++++++++
 libs/net/Makefile.am |    1 +
 src/Makefile.am      |    3 ++-
 3 files changed, 16 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 86607f5..755b430 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,6 +38,19 @@ AC_HEADER_STDC
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
 # ----------------------------------------------------------
+# LIBTOOL VERSIONING
+# ----------------------------------------------------------
+
+# Libtool library version, not to confuse with API version
+# see http://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html
+
+GRL_LT_VERSION=1:0:0
+GRLNET_LT_VERSION=0:1:0
+
+AC_SUBST([GRL_LT_VERSION])
+AC_SUBST([GRLNET_LT_VERSION])
+
+# ----------------------------------------------------------
 # ENVIRONMENT CONFIGURATION
 # ----------------------------------------------------------
 
diff --git a/libs/net/Makefile.am b/libs/net/Makefile.am
index 48a2da8..fac5c9d 100644
--- a/libs/net/Makefile.am
+++ b/libs/net/Makefile.am
@@ -37,6 +37,7 @@ libgrlnet_ GRL_MAJORMINOR@_la_LIBADD =	\
 	$(NET_LIBS)
 
 libgrlnet_ GRL_MAJORMINOR@_la_LDFLAGS =	\
+	-version-info $(GRLNET_LT_VERSION)		\
 	-no-undefined
 
 libgrlnet_ GRL_MAJORMINOR@includedir =	\
diff --git a/src/Makefile.am b/src/Makefile.am
index ac05009..c0aea2c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -37,7 +37,8 @@ lib GRL_NAME@_la_CFLAGS =	\
 lib GRL_NAME@_la_LIBADD =	\
 	$(DEPS_LIBS)
 
-lib GRL_NAME@_la_LDFLAGS =	\
+lib GRL_NAME@_la_LDFLAGS =				\
+	-version-info $(GRL_LT_VERSION)	\
 	-no-undefined
 
 lib GRL_NAME@_la_SOURCES =					\