Use XORG_CWARNFLAGS & XORG_CHANGELOG macros from xorg-macros 1.2

Makefile.am

@@ -44,13 +44,12 @@ nodist_libXfontinclude_HEADERS = \
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = xfont.pc
 
-EXTRA_DIST = xfont.pc.in autogen.sh include/X11/fonts/fontconf.h.in ChangeLog
+EXTRA_DIST = xfont.pc.in autogen.sh include/X11/fonts/fontconf.h.in
 
 .PHONY: ChangeLog
 
-CLEANFILES = ChangeLog
 ChangeLog:
-	(GIT_DIR=$(top_srcdir)/.git git-log > .changelog.tmp && mv .changelog.tmp ChangeLog; rm -f .changelog.tmp) || (touch ChangeLog; echo 'git directory not found: installing possibly empty changelog.' >&2)
+	$(CHANGELOG_CMD)
 
 dist-hook: ChangeLog
 

configure.ac

@@ -36,6 +36,10 @@ AM_INIT_AUTOMAKE([foreign dist-bzip2])
 AM_CONFIG_HEADER(config.h)
 AC_CONFIG_HEADERS([include/X11/fonts/fontconf.h])
 
+# Require xorg-macros version >= 1.2.0 for XORG_CWARNFLAGS & XORG_CHANGELOG
+m4_ifndef([XORG_MACROS_VERSION], [AC_FATAL([must install xorg-macros 1.2 or later before running autoconf/autogen])])
+XORG_MACROS_VERSION(1.2)
+
 # Check for progs
 AC_PROG_CC
 AC_PROG_LIBTOOL
@@ -208,12 +212,7 @@ PKG_CHECK_MODULES(XFONT, xproto xtrans fontsproto fontenc)
 # Transport selection macro from xtrans.m4
 XTRANS_CONNECTION_FLAGS
 
-if test "x$GCC" = "xyes"; then
-	CWARNFLAGS="-Wall -Wpointer-arith -Wstrict-prototypes \
-	-Wmissing-prototypes -Wmissing-declarations \
-	-Wnested-externs -fno-strict-aliasing"
-fi
-AC_SUBST([CWARNFLAGS])
+XORG_CWARNFLAGS
 
 case $host_os in
     linux*)
@@ -229,6 +228,7 @@ esac
 AC_SUBST([OS_CFLAGS])
 
 XORG_RELEASE_VERSION
+XORG_CHANGELOG
 
 AC_OUTPUT([Makefile
 	   src/Makefile