[metacity] libmetacity: add version information

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 2c2aed8e1a66a875312432f82f8dcbdd71b865cd
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Fri Jun 3 01:25:12 2016 +0300

    libmetacity: add version information

 configure.ac            |   11 +++++++++++
 libmetacity/Makefile.am |    1 +
 2 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a8140ce..e8e67fa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -104,6 +104,17 @@ GTK_DATA_PREFIX=`$PKG_CONFIG --variable=prefix gtk+-3.0`
 AC_DEFINE_UNQUOTED([GTK_DATA_PREFIX], ["$GTK_DATA_PREFIX"], [GTK+ data prefix])
 
 dnl **************************************************************************
+dnl Library version information
+dnl **************************************************************************
+
+m4_define([lt_current], [0])
+m4_define([lt_revision], [0])
+m4_define([lt_age], [0])
+m4_define([lt_version_info], [lt_current:lt_revision:lt_age])
+
+AC_SUBST([LT_VERSION_INFO], [lt_version_info])
+
+dnl **************************************************************************
 
 # Honor aclocal flags
 AC_SUBST(ACLOCAL_AMFLAGS, "\${ACLOCAL_FLAGS}")
diff --git a/libmetacity/Makefile.am b/libmetacity/Makefile.am
index e378fd0..8d4c1d0 100644
--- a/libmetacity/Makefile.am
+++ b/libmetacity/Makefile.am
@@ -58,6 +58,7 @@ libmetacity_la_CFLAGS = \
        $(NULL)
 
 libmetacity_la_LDFLAGS = \
+       -version-info $(LT_VERSION_INFO) \
        $(WARN_LDFLAGS) \
        $(AM_LDFLAGS) \
        $(NULL)