[coreboot-gerrit] Patch set updated for coreboot: Add option for "timeless" builds

[Nico Huber (nico.h@gmx.de)]

Nico Huber (nico.h at gmx.de) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13412

-gerrit

commit 25c84664c954aab65350e61e58eda05c5e3944f1
Author: Nico Huber <nico.h at gmx.de>
Date:   Sun Jan 24 16:00:50 2016 +0100

    Add option for "timeless" builds
    
    Builds with BUILD_TIMELESS=1 shall always give a bit identical output
    for stable inputs. This should help verifying that resulting rom files
    stay the same across commits that shouldn't change the outcome.
    
    To be useful for builds that rely on 3rdparty/arm-trusted-firmware,
    this needs a similar change there.
    
    Change-Id: Ia0a22e3e79fbd0abbd2a9071ecbeef6541787a08
    Signed-off-by: Nico Huber <nico.h at gmx.de>
---
 Makefile.inc                  | 6 +++++-
 util/genbuild_h/genbuild_h.sh | 6 +++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/Makefile.inc b/Makefile.inc
index 46c85f8..43996d8 100644
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -22,11 +22,15 @@ CONFIG_FMDFILE:=$(call strip_quotes,$(CONFIG_FMDFILE))
 
 #######################################################################
 # misleadingly named, this is the coreboot version
+ifeq ($(BUILD_TIMELESS),1)
+export KERNELVERSION := TIMELESS
+else
 export KERNELVERSION := $(strip $(if $(GIT),\
 	$(shell git describe --dirty --always || git describe),\
 	$(if $(wildcard $(top)/.coreboot-version),\
 		$(shell cat $(top)/.coreboot-version),\
 		coreboot-unknown$(KERNELREVISION))))
+endif
 
 #######################################################################
 # Basic component discovery
@@ -310,7 +314,7 @@ CPPFLAGS_common += -I3rdparty
 CFLAGS_common += -pipe -g -nostdinc
 CFLAGS_common += -nostdlib -Wall -Wundef -Wstrict-prototypes -Wmissing-prototypes
 CFLAGS_common += -Wwrite-strings -Wredundant-decls -Wno-trigraphs
-CFLAGS_common += -Wstrict-aliasing -Wshadow
+CFLAGS_common += -Wstrict-aliasing -Wshadow -Wdate-time
 CFLAGS_common += -fno-common -ffreestanding -fno-builtin -fomit-frame-pointer
 CFLAGS_common += -ffunction-sections -fdata-sections
 
diff --git a/util/genbuild_h/genbuild_h.sh b/util/genbuild_h/genbuild_h.sh
index 7f0c768..d68b867 100755
--- a/util/genbuild_h/genbuild_h.sh
+++ b/util/genbuild_h/genbuild_h.sh
@@ -24,7 +24,11 @@ export TZ=UTC
 
 top=`dirname $0`/../..
 
-if [ -e "${top}/.git" -a -x "$(command -v git)" ]; then
+if [ "${BUILD_TIMELESS}" -eq 1 ]; then
+	GITREV=Timeless
+	TIMESOURCE="fixed"
+	DATE=0
+elif [ -e "${top}/.git" -a -x "$(command -v git)" ]; then
 	GITREV=$(LANG= git log -1 --format=format:%h)
 	TIMESOURCE=git
 	DATE=$(git log --pretty=format:%ct -1)