[PATCH] override build timestamp

[Olaf Hering <olaf@aepfle.de>]

Pass a timestamp to kbuild via an enviroment variable.

    TZ=UTC BUILD_TIMESTAMP=2007-01-01 make -kj O=../O vmlinux

This can be used when the kernel source is in a SCM and uname -v
is supposed to give the commit date and not the package build time.

Signed-off-by: Olaf Hering <olaf@aepfle.de>

---
 scripts/mkcompile_h |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Index: linux-2.6/scripts/mkcompile_h
===================================================================
--- linux-2.6.orig/scripts/mkcompile_h
+++ linux-2.6/scripts/mkcompile_h
@@ -30,7 +30,12 @@ UTS_VERSION="#$VERSION"
 CONFIG_FLAGS=""
 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
-UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS `LC_ALL=C LANG=C date`"
+if [ -n "$BUILD_TIMESTAMP" ]; then
+  TIMESTAMP="`LC_ALL=C LANG=C date -d "$BUILD_TIMESTAMP"`"
+else
+  TIMESTAMP="`LC_ALL=C LANG=C date`"
+fi
+UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
 
 # Truncate to maximum length