build system: extend src-to-obj for non-.c/.S files

It also creates file names in the build directory and with
the stage sliced in, but keeps the extension for anything
not .c or .S.

Also some handling for non-.c/.S files was adapted to match.

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

Change-Id: If8f89a7daffcf51f430b64c3293d2a817ae5120f
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/9175
Reviewed-by: Aaron Durbin <adurbin@google.com>
Tested-by: build bot (Jenkins)
diff --git a/Makefile b/Makefile
index c5cbda1f..03811c6 100644
--- a/Makefile
+++ b/Makefile
@@ -203,7 +203,12 @@
 # Eliminate duplicate mentions of source files in a class
 $(foreach class,$(classes),$(eval $(class)-srcs:=$(sort $($(class)-srcs))))
 
-src-to-obj=$(addsuffix .$(1).o, $(basename $(patsubst src/%, $(obj)/%, $(2))))
+# Converts one or more source file paths to their corresponding build/ paths.
+# Only .c and .S get converted to .o, other files (like .ld) keep their name.
+# $1 stage name
+# $2 file path (list)
+src-to-obj=$(foreach file,$(2),$(basename $(patsubst src/%,$(obj)/%,$(file))).$(1)$(patsubst %.c,%.o,$(patsubst %.S,%.o,$(suffix $(file)))))
+
 $(foreach class,$(classes),$(eval $(class)-objs:=$(call src-to-obj,$(class),$($(class)-srcs))))
 
 # Save all objs before processing them (for dependency inclusion)
@@ -241,7 +246,7 @@
 foreach-src=$(foreach file,$($(1)-srcs),$(eval $(call $(1)-objs_$(subst .,,$(suffix $(file)))_template,$(subst src/,,$(basename $(file))))))
 $(eval $(foreach class,$(classes),$(call foreach-src,$(class))))
 
-DEPENDENCIES = $(originalobjs:.o=.d)
+DEPENDENCIES = $(addsuffix .d,$(basename $(allobjs)))
 -include $(DEPENDENCIES)
 
 printall:
diff --git a/Makefile.inc b/Makefile.inc
index 81b4c2b..c9285cf 100644
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -142,10 +142,10 @@
 #######################################################################
 # Add handler to compile ACPI's ASL
 define ramstage-objs_asl_template
-$(obj)/$(1).ramstage.o: src/$(1).asl $(obj)/config.h
+$(obj)/$(1).ramstage.asl: src/$(1).asl $(obj)/config.h
 	@printf "    IASL       $$(subst $(top)/,,$$(@))\n"
-	$(CC_ramstage) -x assembler-with-cpp -E -MMD -MT $$(@) -D__ACPI__ -P -include $(src)/include/kconfig.h -I$(obj) -I$(src) -I$(src)/include -I$(src)/arch/$(ARCHDIR-$(ARCH-ramstage-y))/include -I$(src)/mainboard/$(MAINBOARDDIR) $$< -o $$(basename $$@).asl
-	cd $$(dir $$@); $(IASL) -p $$(notdir $$@) -tc $$(notdir $$(basename $$@)).asl
+	$(CC_ramstage) -x assembler-with-cpp -E -MMD -MT $$(@) -D__ACPI__ -P -include $(src)/include/kconfig.h -I$(obj) -I$(src) -I$(src)/include -I$(src)/arch/$(ARCHDIR-$(ARCH-ramstage-y))/include -I$(src)/mainboard/$(MAINBOARDDIR) $$< -o $$@
+	cd $$(dir $$@); $(IASL) -p $$(notdir $$@) -tc $$(notdir $$@)
 	mv $$(basename $$@).hex $$(basename $$@).c
 	$(CC_ramstage) $$(CFLAGS_ramstage) $$(CPPFLAGS_ramstage) $$(if $$(subst dsdt,,$$(basename $$(notdir $(1)))), -DAmlCode=AmlCode_$$(basename $$(notdir $(1)))) -c -o $$@ $$(basename $$@).c
 	# keep %.o: %.c rule from catching the temporary .c file after a make clean
diff --git a/src/arch/arm64/armv8/secmon/Makefile.inc b/src/arch/arm64/armv8/secmon/Makefile.inc
index 6609692..85c3c0a 100644
--- a/src/arch/arm64/armv8/secmon/Makefile.inc
+++ b/src/arch/arm64/armv8/secmon/Makefile.inc
@@ -38,7 +38,7 @@
 secmon-y += ../../cpu.c
 secmon-y += ../../transition_asm.S ../../transition.c
 
-ramstage-srcs += $(SECMON_BIN)
+ramstage-srcs += $(SECMON_BIN).o
 
 $(SECMON_OBJ):  $$(secmon-objs)
 		$(CC_secmon) $(LDFLAGS) -nostdlib -r -o $@ $^
diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index e6b4bad..8e6ad6d 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -196,7 +196,7 @@
 	mv $@.tmp $@
 endif
 
-romstage-srcs += $(objgenerated)/crt0.s
+romstage-srcs += $(objgenerated)/crt0.S
 
 romstage-libs ?=
 
@@ -237,11 +237,11 @@
 	@printf "    GEN        $(subst $(obj)/,,$(@))\n"
 	printf '$(foreach crt0,$(crt0s),#include "$(crt0:$(obj)/%=%)"\n)' > $@
 
-$(objgenerated)/crt0.romstage.o: $(objgenerated)/crt0.s
+$(objgenerated)/crt0.romstage.o: $(objgenerated)/crt0.S
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
 	$(CC_romstage) $(CFLAGS_x86_32) $(DISASSEMBLY) -c -o $@ $<  > $(basename $@).disasm
 
-$(objgenerated)/crt0.s: $(objgenerated)/crt0.romstage.S $(obj)/config.h $(obj)/build.h
+$(objgenerated)/crt0.S: $(objgenerated)/crt0.romstage.S $(obj)/config.h $(obj)/build.h
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
 	$(CC_romstage) $(CPPFLAGS_romstage) -MMD -x assembler-with-cpp -E -I$(src)/include -I$(src)/arch/x86/include -I$(obj) -include $(obj)/config.h -include $(obj)/build.h -I. -I$(src) $< -o $@
 
diff --git a/src/cpu/x86/Makefile.inc b/src/cpu/x86/Makefile.inc
index 2347f88..8790eaf1 100644
--- a/src/cpu/x86/Makefile.inc
+++ b/src/cpu/x86/Makefile.inc
@@ -12,7 +12,7 @@
 SIPI_DOTO=$(SIPI_ELF:.elf=.o)
 
 ifeq ($(CONFIG_PARALLEL_MP),y)
-ramstage-srcs += $(SIPI_BIN)
+ramstage-srcs += $(SIPI_BIN).o
 endif
 rmodules_$(ARCH-ramstage-y)-$(CONFIG_PARALLEL_MP) += sipi_vector.S
 
diff --git a/src/cpu/x86/smm/Makefile.inc b/src/cpu/x86/smm/Makefile.inc
index b62288a..f409c24 100644
--- a/src/cpu/x86/smm/Makefile.inc
+++ b/src/cpu/x86/smm/Makefile.inc
@@ -58,8 +58,8 @@
 
 ramstage-y += smm_module_loader.c
 
-ramstage-srcs += $(obj)/cpu/x86/smm/smm
-ramstage-srcs += $(obj)/cpu/x86/smm/smmstub
+ramstage-srcs += $(obj)/cpu/x86/smm/smm.o
+ramstage-srcs += $(obj)/cpu/x86/smm/smmstub.o
 
 # SMM Stub Module. The stub is used as a trampoline for relocation and normal
 # SMM handling.
@@ -99,7 +99,7 @@
 
 ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smmrelocate.S
 ifeq ($(CONFIG_HAVE_SMI_HANDLER),y)
-ramstage-srcs += $(obj)/cpu/x86/smm/smm_wrap
+ramstage-srcs += $(obj)/cpu/x86/smm/smm_wrap.o
 endif
 
 # Use TSEG specific entry point and linker script