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>

5 files changed, 16 insertions, 15 deletions

diff --git a/src/arch/arm/Makefile.inc b/src/arch/arm/Makefile.inc
index ffbc8413a75e..cd6c4a4e21d5 100644
--- a/src/arch/arm/Makefile.inc
+++ b/src/arch/arm/Makefile.inc
@@ -63,9 +63,11 @@ bootblock-y += memmove.S
 bootblock-y += div0.c
 bootblock-y += clock.c
 
-$(objcbfs)/bootblock.debug: $(src)/arch/arm/bootblock.ld $(obj)/ldoptions $$(bootblock-objs) $$(VERSTAGE_LIB)
+bootblock-y += bootblock.ld
+
+$(objcbfs)/bootblock.debug: $(obj)/arch/arm/bootblock.bootblock.ld $$(bootblock-objs) $$(VERSTAGE_LIB)
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	$(LD_bootblock) --gc-sections -static -o $@ -L$(obj) --start-group $(bootblock-objs) --end-group -T $(src)/arch/arm/bootblock.ld
+	$(LD_bootblock) --gc-sections -static -o $@ -L$(obj) -T $(obj)/arch/arm/bootblock.bootblock.ld --start-group $(bootblock-objs) --end-group
 
 endif # CONFIG_ARCH_BOOTBLOCK_ARM
 
@@ -73,9 +75,9 @@ endif # CONFIG_ARCH_BOOTBLOCK_ARM
 # verification stage
 ###############################################################################
 
-$(objcbfs)/verstage.debug: $$(verstage-objs) $(src)/arch/arm/verstage.ld $(obj)/ldoptions $$(VB2_LIB)
+$(objcbfs)/verstage.debug: $$(verstage-objs) $(obj)/arch/arm/verstage.verstage.ld $$(VB2_LIB)
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	$(LD_verstage) --gc-sections -static -o $@ -L$(obj) --start-group $(verstage-objs) --end-group -T $(src)/arch/arm/verstage.ld
+	$(LD_verstage) --gc-sections -static -o $@ -L$(obj) -T $(obj)/arch/arm/verstage.verstage.ld --start-group $(verstage-objs) --end-group
 
 verstage-y += div0.c
 verstage-y += eabi_compat.c
@@ -84,6 +86,8 @@ verstage-y += memcpy.S
 verstage-y += memmove.S
 verstage-y += stages.c
 
+verstage-y += verstage.ld
+
 ###############################################################################
 # romstage
 ###############################################################################
@@ -103,11 +107,13 @@ rmodules_arm-y += memcpy.S
 rmodules_arm-y += memmove.S
 rmodules_arm-y += eabi_compat.c
 
+romstage-y += romstage.ld
+
 VBOOT_STUB_DEPS += $(obj)/arch/arm/eabi_compat.rmodules_arm.o
 
-$(objcbfs)/romstage.debug: $$(romstage-objs) $(src)/arch/arm/romstage.ld $(obj)/ldoptions
+$(objcbfs)/romstage.debug: $$(romstage-objs) $(obj)/arch/arm/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/arm/romstage.ld
+	$(LD_romstage) -nostdlib --gc-sections -static -o $@ -L$(obj) -T $(obj)/arch/arm/romstage.romstage.ld --start-group $(romstage-objs) --end-group
 
 endif # CONFIG_ARCH_ROMSTAGE_ARM
 
@@ -133,9 +139,11 @@ rmodules_arm-y += memmove.S
 rmodules_arm-y += eabi_compat.c
 ramstage-srcs += $(wildcard src/mainboard/$(MAINBOARDDIR)/mainboard.c)
 
-$(objcbfs)/ramstage.debug: $$(ramstage-objs) $(src)/arch/arm/ramstage.ld $(obj)/ldoptions
+ramstage-y += ramstage.ld
+
+$(objcbfs)/ramstage.debug: $$(ramstage-objs) $(obj)/arch/arm/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/arm/ramstage.ld
+	$(LD_ramstage) -nostdlib --gc-sections -o $@ -L$(obj) -T $(obj)/arch/arm/ramstage.ramstage.ld --start-group $(ramstage-objs) --end-group
 
 $(objgenerated)/ramstage.o: $(stages_o) $$(ramstage-objs)
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
diff --git a/src/arch/arm/bootblock.ld b/src/arch/arm/bootblock.ld
index 23d66f1e7655..091e3ebdd6bc 100644
--- a/src/arch/arm/bootblock.ld
+++ b/src/arch/arm/bootblock.ld
@@ -21,7 +21,6 @@
 /* We use ELF as output format. So that we can debug the code in some form. */
 OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
-INCLUDE ldoptions
 
 PHDRS
 {
@@ -29,7 +28,6 @@ PHDRS
 }
 
 ENTRY(_start)
-TARGET(binary)
 SECTIONS
 {
 	. = CONFIG_BOOTBLOCK_BASE;
diff --git a/src/arch/arm/ramstage.ld b/src/arch/arm/ramstage.ld
index 5e0607d9a793..7daa8cbbb899 100644
--- a/src/arch/arm/ramstage.ld
+++ b/src/arch/arm/ramstage.ld
@@ -19,9 +19,6 @@
  *  2005.12 yhlu add ramstage cross the vga font buffer handling
  */
 
-/* We use ELF as output format. So that we can debug the code in some form. */
-INCLUDE ldoptions
-
 ENTRY(stage_entry)
 
 PHDRS
diff --git a/src/arch/arm/romstage.ld b/src/arch/arm/romstage.ld
index 873b8e0012eb..d107687c901b 100644
--- a/src/arch/arm/romstage.ld
+++ b/src/arch/arm/romstage.ld
@@ -22,7 +22,6 @@
 /* We use ELF as output format. So that we can debug the code in some form. */
 OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
-INCLUDE ldoptions
 
 ENTRY(stage_entry)
 
diff --git a/src/arch/arm/verstage.ld b/src/arch/arm/verstage.ld
index f0e88e590217..88d4bc8dfb03 100644
--- a/src/arch/arm/verstage.ld
+++ b/src/arch/arm/verstage.ld
@@ -10,7 +10,6 @@
 /* We use ELF as output format. So that we can debug the code in some form. */
 OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
-INCLUDE ldoptions
 
 PHDRS
 {