Use osmocom-style git-version-gen / .version magic
This generates the version number from the latest tag + git history
Change-Id: I71e1c3f8f534d9e9690c94068eccdee29a6fee12
diff --git a/Makefile.am b/Makefile.am
index 8232770..970fbf7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -4,4 +4,10 @@
pkgconfigdir = $(libdir)/pkgconfig
pkgconfig_DATA = libgtp.pc
-EXTRA_DIST = README.md README.FreeBSD README.MacOSX README.Solaris
+BUILT_SOURCES = $(top_srcdir)/.version
+$(top_srcdir)/.version:
+ echo $(VERSION) > $@-t && mv $@-t $@
+dist-hook:
+ echo $(VERSION) > $(distdir)/.tarball-version
+
+EXTRA_DIST = git-version-gen .version README.md README.FreeBSD README.MacOSX README.Solaris