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Run linker scripts via C preprocessor

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This commit is contained in:
Angus Gratton 2015-07-16 16:24:33 +10:00
parent c95369e86c
commit 5bbbc1f144
1 changed files with 17 additions and 7 deletions
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24
common.mk
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@ -50,9 +50,10 @@ CROSS ?= xtensa-lx106-elf-
AR = $(CROSS)ar
CC = $(CROSS)gcc
CPP = $(CROSS)cpp
LD = $(CROSS)gcc
NM = $(CROSS)nm
CPP = $(CROSS)g++
C++ = $(CROSS)g++
SIZE = $(CROSS)size
OBJCOPY = $(CROSS)objcopy
OBJDUMP = $(CROSS)objdump
@ -73,7 +74,7 @@ OWN_LIBC ?= 1
# Note: this isn't overridable without a not-yet-merged patch to esptool
ENTRY_SYMBOL = call_user_start
CFLAGS = -Wall -Werror -Wl,-EL -nostdlib -mlongcalls -mtext-section-literals -std=gnu99
CFLAGS = -Wall -Werror -Wl,-EL -nostdlib -mlongcalls -mtext-section-literals -std=gnu99 $(CPPFLAGS)
LDFLAGS = -nostdlib -Wl,--no-check-sections -Wl,-L$(BUILD_DIR)sdklib -Wl,-L$(ROOT)lib -u $(ENTRY_SYMBOL) -Wl,-static -Wl,-Map=build/${PROGRAM}.map
ifeq ($(FLAVOR),debug)
@ -85,9 +86,10 @@ else
endif
GITSHORTREV=\"$(shell cd $(ROOT); git rev-parse --short -q HEAD)\"
CFLAGS += -DGITSHORTREV=$(GITSHORTREV)
CPPFLAGS += -DGITSHORTREV=$(GITSHORTREV)
LINKER_SCRIPTS = $(ROOT)ld/eagle.app.v6.ld $(ROOT)ld/eagle.rom.addr.v6.ld
# Linker scripts, all found in $(ROOT)/ld
LINKER_SCRIPTS = eagle.app.v6.ld eagle.rom.addr.v6.ld
####
#### no user configurable options below here
@ -103,11 +105,14 @@ lc = $(subst A,a,$(subst B,b,$(subst C,c,$(subst D,d,$(subst E,e,$(subst F,f,$(s
# assume the program dir is the directory the top-level makefile was run in
PROGRAM_DIR := $(dir $(firstword $(MAKEFILE_LIST)))
# linker scripts get run through the C preprocessor
LINKER_SCRIPTS_PROCESSED = $(addprefix $(BUILD_DIR)ld/,$(LINKER_SCRIPTS))
# derive various parts of compiler/linker arguments
SDK_LIB_ARGS = $(addprefix -l,$(SDK_LIBS))
LIB_ARGS = $(addprefix -l,$(LIBS))
PROGRAM_OUT = $(BUILD_DIR)$(PROGRAM).out
LDFLAGS += $(addprefix -T,$(LINKER_SCRIPTS))
LDFLAGS += $(addprefix -T,$(LINKER_SCRIPTS_PROCESSED))
FW_FILE_1 = $(addprefix $(FW_BASE),$(FW_1).bin)
FW_FILE_2 = $(addprefix $(FW_BASE),$(FW_2).bin)
@ -252,12 +257,17 @@ $(eval $(call component_compile_rules,PROGRAM))
## Include other components (this is where the actual compiler sections are generated)
$(foreach component,$(COMPONENTS), $(eval include $(ROOT)$(component)/component.mk))
## Run linker scripts via C preprocessor to evaluate macros
$(BUILD_DIR)ld/%.ld: $(ROOT)ld/%.ld | $(BUILD_DIR)ld
$(Q) $(CPP) $(CPPFLAGS) -E -C -P $< > $@
# final linking step to produce .elf
$(PROGRAM_OUT): $(COMPONENT_ARS) $(SDK_PROCESSED_LIBS) $(LINKER_SCRIPTS)
$(PROGRAM_OUT): $(COMPONENT_ARS) $(SDK_PROCESSED_LIBS) $(LINKER_SCRIPTS_PROCESSED)
$(vecho) "LD $@"
$(Q) $(LD) $(LDFLAGS) -Wl,--start-group $(LIB_ARGS) $(SDK_LIB_ARGS) $(COMPONENT_ARS) -Wl,--end-group -o $@
$(BUILD_DIR) $(FW_BASE) $(BUILD_DIR)sdklib:
$(BUILD_DIR) $(FW_BASE) $(BUILD_DIR)sdklib $(BUILD_DIR)ld:
$(Q) mkdir -p $@
$(FW_FILE_1) $(FW_FILE_2): $(PROGRAM_OUT) $(FW_BASE)