[libgxps] Add rules to create ChangeLog

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 81bc2fa415c61fbb518cd66081b86e7b9bfefb63
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Wed Oct 12 11:55:32 2011 +0200

    Add rules to create ChangeLog

 Makefile.am |   35 +++++++++++++++++++++++++++++++++++
 1 files changed, 35 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 2535e65..feefc89 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -19,3 +19,38 @@ DISTCHECK_CONFIGURE_FLAGS = 		\
 	--enable-gtk-doc		\
 	--disable-maintainer-mode	\
 	--enable-introspection
+
+MAINTAINERCLEANFILES = \
+	ChangeLog \
+	$(srcdir)/INSTALL \
+	$(srcdir)/aclocal.m4 \
+	$(srcdir)/config.guess \
+	$(srcdir)/config.h.in \
+	$(srcdir)/config.sub \
+	$(srcdir)/configure \
+	$(srcdir)/depcomp \
+	$(srcdir)/install-sh \
+	$(srcdir)/ltmain.sh \
+	$(srcdir)/missing \
+	$(srcdir)/gtk-doc.make \
+	`find "$(srcdir)" -type f -name Makefile.in -print`
+
+distclean-local:
+	if test "$(srcdir)" = "."; then :; else \
+		rm -f ChangeLog; \
+	fi
+
+ChangeLog:
+	$(AM_V_GEN) if test -d "$(srcdir)/.git"; then \
+	  (GIT_DIR=$(top_srcdir)/.git ./missing --run git log -M -C --name-status --date=short --no-color) | fmt --split-only > $  tmp \
+	  && mv -f $  tmp $@ \
+	  || ($(RM) $  tmp; \
+	      echo Failed to generate ChangeLog, your ChangeLog may be outdated >&2; \
+	      (test -f $@ || echo git log is required to generate this file >> $@)); \
+	else \
+	  test -f $@ || \
+	  (echo A git checkout and git log is required to generate ChangeLog >&2 && \
+	  echo A git checkout and git log is required to generate this file >> $@); \
+	fi
+
+.PHONY: ChangeLog
\ No newline at end of file