build system: run linker scripts through the preprocessor

This allows combining and simplifying linker scripts.

This is inspired by the commit listed below, but rewritten to match
upstream, and split in smaller pieces to keep intent clear.

Change-Id: Ie5c11bd8495a399561cefde2f3e8dd300f4feb98
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Based-On-Change-Id: I50af7dacf616e0f8ff4c43f4acc679089ad7022b
Based-On-Signed-off-by: Julius Werner <jwerner@chromium.org>
Based-On-Reviewed-on: https://chromium-review.googlesource.com/219170
Reviewed-on: http://review.coreboot.org/9303
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 11 insertions, 6 deletions

diff --git a/src/arch/arm64/Makefile.inc b/src/arch/arm64/Makefile.inc
index c1f1112280..a9fbde5acd 100644
--- a/src/arch/arm64/Makefile.inc
+++ b/src/arch/arm64/Makefile.inc
@@ -68,11 +68,13 @@ bootblock-y += ../../lib/memset.c
 bootblock-y += ../../lib/memcpy.c
 bootblock-y += ../../lib/memmove.c
 
+bootblock-y += bootblock.ld
+
 # Build the bootblock
 
-$(objcbfs)/bootblock.debug: $(src)/arch/arm64/bootblock.ld $(obj)/ldoptions $$(bootblock-objs) $(obj)/config.h
+$(objcbfs)/bootblock.debug: $(obj)/arch/arm64/bootblock.bootblock.ld $$(bootblock-objs) $(obj)/config.h
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	$(LD_bootblock) --gc-sections -static -o $@ -L$(obj) --start-group $(bootblock-objs) --end-group -T $(src)/arch/arm64/bootblock.ld
+	$(LD_bootblock) --gc-sections -static -o $@ -L$(obj) --start-group $(bootblock-objs) --end-group -T $(obj)/arch/arm64/bootblock.bootblock.ld
 
 endif # CONFIG_ARCH_BOOTBLOCK_ARM64
 
@@ -94,6 +96,8 @@ romstage-y += ../../lib/memmove.c
 romstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c
 romstage-y += transition.c transition_asm.S
 
+romstage-y += romstage.ld
+
 rmodules_arm64-y += ../../lib/memset.c
 rmodules_arm64-y += ../../lib/memcpy.c
 rmodules_arm64-y += ../../lib/memmove.c
@@ -102,9 +106,9 @@ rmodules_arm64-y += eabi_compat.c
 # Build the romstage
 VBOOT_STUB_DEPS += $(obj)/arch/arm/eabi_compat.rmodules_arm64.o
 
-$(objcbfs)/romstage.debug: $$(romstage-objs) $(src)/arch/arm64/romstage.ld $(obj)/ldoptions
+$(objcbfs)/romstage.debug: $$(romstage-objs) $(obj)/arch/arm64/romstage.romstage.ld
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	$(LD_romstage) -nostdlib --gc-sections -static -o $@ -L$(obj) --start-group $(romstage-objs) --end-group -T $(src)/arch/arm64/romstage.ld
+	$(LD_romstage) -nostdlib --gc-sections -static -o $@ -L$(obj) --start-group $(romstage-objs) --end-group -T $(obj)/arch/arm64/romstage.romstage.ld
 
 endif # CONFIG_ARCH_ROMSTAGE_ARM64
 
@@ -140,14 +144,15 @@ secmon-$(CONFIG_ARCH_USE_SECURE_MONITOR) += ../../lib/memcmp.c
 secmon-$(CONFIG_ARCH_USE_SECURE_MONITOR) += ../../lib/memcpy.c
 
 ramstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c
+ramstage-y += ramstage.ld
 
 ramstage-srcs += $(wildcard src/mainboard/$(MAINBOARDDIR)/mainboard.c)
 
 # Build the ramstage
 
-$(objcbfs)/ramstage.debug: $$(ramstage-objs) $(src)/arch/arm64/ramstage.ld $(obj)/ldoptions
+$(objcbfs)/ramstage.debug: $$(ramstage-objs) $(obj)/arch/arm64/ramstage.ramstage.ld
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-	$(LD_ramstage) -nostdlib --gc-sections -o $@ -L$(obj) --start-group $(ramstage-objs) --end-group -T $(src)/arch/arm64/ramstage.ld
+	$(LD_ramstage) -nostdlib --gc-sections -o $@ -L$(obj) --start-group $(ramstage-objs) --end-group -T $(obj)/arch/arm64/ramstage.ramstage.ld
 
 $(objgenerated)/ramstage.o: $(stages_o) $$(ramstage-objs)
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"