From 2e9fdf8841de40f008697ba8bf711fa3f3f2c0e8 Mon Sep 17 00:00:00 2001
From: Andreas Zwinkau <zwinkau@kit.edu>
Date: Wed, 26 Oct 2011 15:51:51 +0200
Subject: [PATCH] Compile git revision into libfirm

---
 .gitignore       | 1 +
 Makefile         | 8 ++++++++
 ir/common/firm.c | 4 +---
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index c486cc980..702836dd2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 Makefile.in
+firm_revision.h
 /aclocal.m4
 /autom4te.cache/
 /config.guess
diff --git a/Makefile b/Makefile
index cd845835a..a3cdbdda6 100644
--- a/Makefile
+++ b/Makefile
@@ -37,6 +37,14 @@ CFLAGS    += -Wall -W -Wextra -Wstrict-prototypes -Wmissing-prototypes -Wwrite-s
 LINKFLAGS += $(LINKFLAGS_$(variant))
 VPATH = $(srcdir)
 
+REVISION ?= $(shell git describe --abbrev=40 --always --dirty --match '')
+
+# Update revision.h if necessary
+UNUSED := $(shell \
+	REV="\#define libfirm_VERSION_REVISION \"$(REVISION)\""; \
+	echo "$$REV" | cmp -s - firm_revision.h 2> /dev/null || echo "$$REV" > firm_revision.h \
+)
+
 .PHONY: all
 all: firm
 
diff --git a/ir/common/firm.c b/ir/common/firm.c
index 162ac0cec..7794fe681 100644
--- a/ir/common/firm.c
+++ b/ir/common/firm.c
@@ -25,9 +25,7 @@
  */
 #include "config.h"
 
-#ifdef HAVE_FIRM_REVISION_H
-# include "firm_revision.h"
-#endif
+#include "firm_revision.h"
 
 #include <string.h>
 #include <stdio.h>
-- 
2.20.1