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To reduce code duplication, make sure STAGE2_OBJ does not contain

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any object already mentioned in STAGE0_OBJ.
This saves 386 bytes in qemu stage2 (~240 bytes after LZMA compression).

Build tested and runtime tested in Qemu.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Peter Stuge <peter@stuge.se>


git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@540 f3766cd6-281f-0410-b1cd-43a5c92072e9
This commit is contained in:
Carl-Daniel Hailfinger 2007-12-06 16:03:32 +00:00
parent 29aef7a30f
commit 91b0dd0974
1 changed files with 7 additions and 2 deletions
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9
arch/x86/Makefile
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@ -198,11 +198,16 @@ endif
STAGE2_OBJ += $(obj)/util/x86emu/libx86emu.a $(LIBGCC_FILE_NAME)
endif
$(obj)/linuxbios.stage2 $(obj)/linuxbios.stage2.map: $(obj)/stage0.init $(STAGE2_OBJ)
# To reduce code duplication, always make sure STAGE2_OBJ does not contain
# any object from STAGE0_OBJ.
STAGE2_OBJ_NEEDED = $(filter-out $(STAGE0_OBJ), $(STAGE2_OBJ))
$(obj)/linuxbios.stage2 $(obj)/linuxbios.stage2.map: $(obj)/stage0.init $(STAGE2_OBJ_NEEDED)
$(Q)# leave a .o with full symbols in it for debugging.
$(Q)printf " LD $(subst $(shell pwd)/,,$(@))\n"
$(Q)$(LD) -R $(obj)/stage0.o -Ttext 0x1000 --entry=stage2 \
-o $(obj)/linuxbios.stage2 $(STAGE2_OBJ)
-o $(obj)/linuxbios.stage2 $(STAGE2_OBJ_NEEDED)
$(Q)$(NM) $(obj)/linuxbios.stage2 | sort -u > $(obj)/linuxbios.stage2.map
#