2016-11-21 18:05:46 +01:00
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ipxe:Makefile: fix issues of build reproducibility
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It is desirable to produce the same bits on subsequent
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builds when the actual code of the package doesn't
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change. (bsc#1011213)
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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src/Makefile.housekeeping | 13 ++++++++++---
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1 file changed, 10 insertions(+), 3 deletions(-)
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--- a/src/Makefile.housekeeping
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+++ b/src/Makefile.housekeeping
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@@ -1079,11 +1079,18 @@ blib : $(BLIB)
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2016-11-16 20:50:57 +01:00
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# Command to generate build ID. Must be unique for each $(BIN)/%.tmp,
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# even within the same build run.
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#
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-BUILD_ID_CMD := perl -e 'printf "0x%08x", int ( rand ( 0xffffffff ) );'
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2016-11-21 18:05:46 +01:00
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+# NB: In the case of the SUSE qemu-ipxe package we want reproducible
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+# builds, so we just use the TGT_ROM_NAME variable, which is already
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+# a unique (in the context of the files we generate) hex value suitable
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+# for specifying the build_id. We no longer define a BUILD_ID_CMD, as
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+# we need to use the TGT_ROM_NAME variable directly in the link command
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2016-11-16 20:50:57 +01:00
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# Build timestamp
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#
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2016-11-21 18:05:46 +01:00
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-BUILD_TIMESTAMP := $(shell date +%s)
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+# NB: In the case of the SUSE qemu-ipxe package we want reproducible
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+# builds, so we use a pre-determined timestamp, rather than the current
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+# timestamp
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+BUILD_TIMESTAMP := $(PACKAGING_TIMESTAMP)
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# Build version
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#
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@@ -1103,7 +1110,7 @@ $(BIN)/version.%.o : core/version.c $(MA
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$(BIN)/%.tmp : $(BIN)/version.%.o $(BLIB) $(MAKEDEPS) $(LDSCRIPT)
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$(QM)$(ECHO) " [LD] $@"
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$(Q)$(LD) $(LDFLAGS) -T $(LDSCRIPT) $(TGT_LD_FLAGS) $< $(BLIB) -o $@ \
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- --defsym _build_id=`$(BUILD_ID_CMD)` \
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+ --defsym _build_id=`$(PRINTF) "0x%b" "$(TGT_ROM_NAME)"` \
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--defsym _build_timestamp=$(BUILD_TIMESTAMP) \
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-Map $(BIN)/$*.tmp.map
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$(Q)$(OBJDUMP) -ht $@ | $(PERL) $(SORTOBJDUMP) >> $(BIN)/$*.tmp.map
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