autoconf: Automatically derive version number from latest git tag

with a fallback to get the version string from a .tarball-version file

1 files changed, 7 insertions, 2 deletions

diff --git a/configure.ac b/configure.ac
index b751cc2..9b8b038 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,14 +1,19 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-AC_PREREQ(2.68)
-AC_INIT([usbmuxd], [1.1.2], [https://github.com/libimobiledevice/usbmuxd/issues],, [https://libimobiledevice.org])
+AC_PREREQ([2.68])
+AC_INIT([usbmuxd], [m4_esyscmd(./git-version-gen $RELEASE_VERSION)], [https://github.com/libimobiledevice/usbmuxd/issues], [], [https://libimobiledevice.org])
 AM_INIT_AUTOMAKE([dist-bzip2 no-dist-gzip check-news])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES])
 AC_CONFIG_SRCDIR([src/])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_MACRO_DIR([m4])
 
+# Check if we have a version defined
+if test -z $PACKAGE_VERSION; then
+  AC_MSG_ERROR([PACKAGE_VERSION is not defined. Make sure to configure a source tree checked out from git or that .tarball-version is present.])
+fi
+
 # Checks for programs.
 AC_PROG_CC
 AM_PROG_CC_C_O