Set libtool version information

* sigc++/Makefile.am (libsigc_2_0_la_LDFLAGS): Add libtool option
-version-info 0:0:0 to specify the version information explicitly.

Author: Daniel Elstner

Diff for: ChangeLog

@@ -1,3 +1,10 @@
+2009-08-17  Daniel Elstner  <danielk@openismus.com>
+
+	Set libtool version information
+
+	* sigc++/Makefile.am (libsigc_2_0_la_LDFLAGS): Add libtool option
+	-version-info 0:0:0 to specify the version information explicitly.
+
 2009-08-16  Daniel Elstner  <daniel.kitta@gmail.com>
 
 	Remove unused parameter names for correctness

Diff for: sigc++/Makefile.am

@@ -40,7 +40,8 @@ libsigc_2_0_la_SOURCES =	\
 
 EXTRA_libsigc_2_0_la_SOURCES = $(sigc_built_cc)
 
-libsigc_2_0_la_LDFLAGS = -no-undefined
+# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+libsigc_2_0_la_LDFLAGS = -no-undefined -version-info 0:0:0
 
 AM_CPPFLAGS = -I$(top_builddir) -I$(top_srcdir)
 AM_CXXFLAGS = $(SIGC_WXXFLAGS)