[S] Change in coreboot[main]: arch/x86: Link ramstage in one go

[Arthur Heymans (Code Review)]

Attention is currently required from: Jérémy Compostella.

Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/83561?usp=email )

Change subject: arch/x86: Link ramstage in one go
......................................................................

arch/x86: Link ramstage in one go

Link ramstage in one go instead of doing partial linking. For some
reason this reduces the size of the binary.

Qemu i440fx:
before:
fallback/ramstage 65321 LZMA (139572 decompressed)
after
fallback/ramstage 60387 LZMA (124228 decompressed)

Also for LTO to work linking needs to be done in one go.

Change-Id: Ib5848ed44c94780acee1cf900f58162256f3c6da
Signed-off-by: Arthur Heymans 
---
M src/arch/x86/Makefile.mk
1 file changed, 3 insertions(+), 7 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/61/83561/1

diff --git a/src/arch/x86/Makefile.mk b/src/arch/x86/Makefile.mk
index 2bd4338..1a59ee9 100644
--- a/src/arch/x86/Makefile.mk
+++ b/src/arch/x86/Makefile.mk
@@ -315,13 +315,9 @@
 $(objcbfs)/ramstage.elf: $(objcbfs)/ramstage.debug.rmod
    cp $< $@

-$(objcbfs)/ramstage.debug: $(objgenerated)/ramstage.o $(call src-to-obj,ramstage,$(CONFIG_MEMLAYOUT_LD_FILE))
-	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-	$(LD_ramstage) $(LDFLAGS_ramstage) -o $@ -L$(obj) $< -T $(call src-to-obj,ramstage,$(CONFIG_MEMLAYOUT_LD_FILE))
-
-$(objgenerated)/ramstage.o: $$(ramstage-objs) $(COMPILER_RT_ramstage) $$(ramstage-libs)
-	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-	$(LD_ramstage) $(LD_MACHINE) -r -o $@ $(COMPILER_RT_FLAGS_ramstage) --whole-archive --start-group $(filter-out %.ld,$(ramstage-objs)) $(ramstage-libs) --no-whole-archive $(COMPILER_RT_ramstage) --end-group
+$(objcbfs)/ramstage.debug: $$(ramstage-objs)
+	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
+	$(LD_ramstage) $(LDFLAGS_ramstage) -o $@ -L$(obj) $(COMPILER_RT_FLAGS_ramstage) --whole-archive --start-group $(filter-out %.ld,$^) --no-whole-archive $(COMPILER_RT_ramstage) --end-group -T $(call src-to-obj,ramstage,$(CONFIG_MEMLAYOUT_LD_FILE))

endif # CONFIG_ARCH_RAMSTAGE_X86_32 / CONFIG_ARCH_RAMSTAGE_X86_64