Use release helper from libosmocore

See
https://osmocom.org/projects/cellular-infrastructure/wiki/Make_a_new_release
for details.

Change-Id: Icdcb388ad22b0c009dac7968408d1e2504c838c1
Related: OS#1861

Makefile.am

@@ -11,3 +11,5 @@ dist-hook:
 	echo $(VERSION) > $(distdir)/.tarball-version
 
 EXTRA_DIST = git-version-gen .version README.md README.FreeBSD README.MacOSX README.Solaris
+
+@RELMAKE@

TODO-RELEASE

@@ -0,0 +1,9 @@
+# When cleaning up this file: bump API version in corresponding Makefile.am and rename corresponding debian/lib*.install
+# according to https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html#Updating-version-info
+# In short:
+# LIBVERSION=c:r:a
+# If the library source code has changed at all since the last update, then increment revision: c:r + 1:a.
+# If any interfaces have been added, removed, or changed since the last update: c + 1:0:0.
+# If any interfaces have been added since the last public release: c:r:a + 1.
+# If any interfaces have been removed or changed since the last public release: c:r:0.
+#library	what		description / commit summary line

configure.ac

@@ -55,6 +55,10 @@ AC_SUBST(EXEC_LDADD)
 # FIXME: Replace `main' with a function in `-links':
 #AC_CHECK_LIB([inks], [main])
 
+dnl include release helper
+RELMAKE='-include osmo-release.mk'
+AC_SUBST([RELMAKE])
+
 dnl GTP Linux kernel dependencies
 AC_ARG_ENABLE([gtp-linux],
 	AS_HELP_STRING([--enable-gtp-linux], [Build GTP tunneling Linux kernel]),

debian/changelog

@@ -1,4 +1,4 @@
-openggsn (0.94) UNRELEASED; urgency=medium
+openggsn (0.94.0) UNRELEASED; urgency=medium
 
   [ Holger Hans Peter Freyther ]
   * Bump version to ease upgrading from Debian SID.