[coreboot] New patch to review for coreboot: 1e798a5 Fix coreboot makefiles not to produce half baked output.

[Stefan Reinauer]

Stefan Reinauer ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/750

-gerrit

commit 1e798a5792e9838f282128561ef6824785d831a7
Author: Vadim Bendebury 
Date:   Sat Nov 5 02:07:01 2011 +0000

Fix coreboot makefiles not to produce half baked output.

It looks like the cbfstool utility generates the output file even when
    it fails to generate it properly. This causes make, if started second
    time in a row, after cbfstool failure, to continue beyond the point of
    failure (as the corrupted output file is present in the output tree,
    the second make invocation presumes that it is valid, as it is newer
    than the dependencies).

The output file should be created only when successful, in an atomic
    operation. There could be other places in the make system which
    require a similar fix, this needs to be investigated further.

Change-Id: I7c17f033ee5937eb712b1a594122430cee5c9146
    Signed-off-by: Vadim Bendebury 
---
 src/arch/x86/Makefile.inc |   16 +++++++++-------
 1 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index aeb4875..b2b9143 100755
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -58,13 +58,15 @@ extract_nth=$(word $(1), $(subst |, ,$(2)))
 ifneq ($(CONFIG_UPDATE_IMAGE),y)
 prebuild-files = \
    $(foreach file,$(cbfs-files), \
-		$(CBFSTOOL) $@ add $(call extract_nth,1,$(file)) $(call extract_nth,2,$(file)) $(call extract_nth,3,$(file)) $(call extract_nth,4,$(file)); )
+	$(CBFSTOOL) $@.tmp add $(call extract_nth,1,$(file)) \
+	$(call extract_nth,2,$(file)) $(call extract_nth,3,$(file)) \
+	$(call extract_nth,4,$(file)) &&)
 prebuilt-files = $(foreach file,$(cbfs-files), $(call extract_nth,1,$(file)))

$(obj)/coreboot.pre1: $(obj)/coreboot.bootblock $$(prebuilt-files) $(CBFSTOOL)
-	rm -f $@
-	$(CBFSTOOL) $@ create $(CONFIG_COREBOOT_ROMSIZE_KB)K $(obj)/coreboot.bootblock
-	$(prebuild-files)
+	$(CBFSTOOL) $@.tmp create $(CONFIG_COREBOOT_ROMSIZE_KB)K $(obj)/coreboot.bootblock
+	$(prebuild-files) true
+	mv $@.tmp $@
 else
 .PHONY: $(obj)/coreboot.pre1
 $(obj)/coreboot.pre1: $(CBFSTOOL)
@@ -269,10 +271,10 @@ endif

$(obj)/coreboot.pre: $(obj)/coreboot.romstage $(obj)/coreboot.pre1 $(CBFSTOOL)
    @printf "    CBFS       $(subst $(obj)/,,$(@))\n"
-	rm -f $@
-	cp $(obj)/coreboot.pre1 $@
-	$(CBFSTOOL) $@ add-stage $(obj)/romstage.elf \
+	cp $(obj)/coreboot.pre1 $@.tmp
+	$(CBFSTOOL) $@.tmp add-stage $(obj)/romstage.elf \
        $(CONFIG_CBFS_PREFIX)/romstage x 0x$(shell cat $(obj)/location.txt)
+	mv $@.tmp $@
 #FIXME: location.txt might require an offset of header size

#######################################################################