mirror of https://gerrit.osmocom.org/simtrace2
clang build support
Supposed to be used with https://github.com/ARM-software/LLVM-embedded-toolchain-for-Arm + distro provided binutils-arm-none-eabi package, might provide better and more reliable binary sizes, especially for the bootloader. Just run USE_CLANG=1 make Change-Id: I1a19f40d44797efad5c46121e73115ed738a095b
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@ -73,12 +73,20 @@ AT91LIB_USB_DFU_PATH = $(AT91LIB)/usb/device/dfu
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# Tool suffix when cross-compiling
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CROSS_COMPILE = arm-none-eabi-
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LIBS = -Wl,--start-group -lgcc -Wl,--end-group -nostdlib
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# Compilation tools
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USE_CLANG ?= 0
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ifneq ("$(USE_CLANG)","0")
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# --target=thumbv7m-none-eabi
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CC = clang
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LD = ld.lld
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SIZE = llvm-size
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LIBS = -nostdlib
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else
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CC = $(CROSS_COMPILE)gcc
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LD = $(CROSS_COMPILE)ld
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SIZE = $(CROSS_COMPILE)size
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LIBS = -Wl,--start-group -lgcc -Wl,--end-group -nostdlib
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endif
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STRIP = $(CROSS_COMPILE)strip
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OBJCOPY = $(CROSS_COMPILE)objcopy
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GDB = $(CROSS_COMPILE)gdb
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@ -139,7 +147,11 @@ ALLOW_PEER_ERASE?=0
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#CFLAGS+=-DUSB_NO_DEBUG=1
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# Optimization level, put in comment for debugging
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ifneq ("$(USE_CLANG)","0")
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OPTIMIZATION ?= -Oz
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else
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OPTIMIZATION ?= -Os
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endif
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# Flags
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INCLUDES_USB = -I$(AT91LIB)/usb/include -I$(AT91LIB)
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@ -153,6 +165,11 @@ INCLUDES += -Ilibosmocore/include
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INCLUDES += -Isrc_simtrace -Iinclude
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INCLUDES += -Iapps/$(APP)
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ifneq ("$(USE_CLANG)","0")
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CFLAGS += -Wno-unknown-warning-option -Wno-empty-body -fno-exceptions -fno-unwind-tables --config armv7em_soft_nofp_nosys
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else
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CFLAGS += -Wno-suggest-attribute=noreturn --param max-inline-insns-single=500
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endif
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CFLAGS += -Wall -Wchar-subscripts -Wcomment -Wimplicit-int -Wformat=2
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CFLAGS += -Werror-implicit-function-declaration -Wmain -Wparentheses
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CFLAGS += -Wsequence-point -Wreturn-type -Wswitch -Wtrigraphs #-Wunused
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@ -165,16 +182,16 @@ CFLAGS += -Wredundant-decls -Wnested-externs #-Winline -Wlong-long
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CFLAGS += -Wunreachable-code
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#CFLAGS += -Wcast-align
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#CFLAGS += -std=c11
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CFLAGS += -Wmissing-noreturn
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#CFLAGS += -Wmissing-noreturn
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#CFLAGS += -Wconversion
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CFLAGS += -Wno-unused-but-set-variable -Wno-unused-variable
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CFLAGS += -Wno-suggest-attribute=noreturn
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# -mlong-calls -Wall
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#CFLAGS += -save-temps -fverbose-asm
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#CFLAGS += -Wa,-a,-ad
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CFLAGS += -D__ARM -fno-builtin
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CFLAGS += --param max-inline-insns-single=500 -mcpu=cortex-m3 -mthumb # -mfix-cortex-m3-ldrd
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CFLAGS += -mcpu=cortex-m3 -mthumb # -mfix-cortex-m3-ldrd
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CFLAGS += -ffunction-sections -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -DTRACE_LEVEL=$(TRACE_LEVEL) -DALLOW_PEER_ERASE=$(ALLOW_PEER_ERASE)
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CFLAGS += -DGIT_VERSION=\"$(GIT_VERSION)\"
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CFLAGS += -DBOARD=\"$(BOARD)\" -DBOARD_$(BOARD)
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@ -188,7 +205,10 @@ CFLAGS += -fno-stack-protector
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endif
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ASFLAGS = -mcpu=cortex-m3 -mthumb -Wall -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -D__ASSEMBLY__
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LDFLAGS = -mcpu=cortex-m3 -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=ResetException -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--print-memory-usage -Wl,--no-undefined $(LIB)
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LDFLAGS = -mcpu=cortex-m3 -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=ResetException -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--no-undefined $(LIB)
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ifeq ("$(USE_CLANG)","0")
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LDFLAGS += -Wl,--warn-section-align -Wl,--print-memory-usage
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endif
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#LD_OPTIONAL=-Wl,--print-gc-sections -Wl,--stats
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# Append BIN directories to output filename
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@ -227,14 +247,14 @@ C_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(C_OBJECTS))
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ASM_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(ASM_OBJECTS))
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$(1): $$(ASM_OBJECTS_$(1)) $$(C_OBJECTS_$(1))
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$(SILENT)$(CC) $(LDFLAGS) $(LD_OPTIONAL) -T"libboard/common/resources/$(CHIP)/$$@.ld" -Wl,-Map,$(OUTPUT)-$$@.map -o $(OUTPUT)-$$@.elf $$^ $(LIBS)
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$(SILENT)$(CC) $(CFLAGS) $(LDFLAGS) $(LD_OPTIONAL) -T"libboard/common/resources/$(CHIP)/$$@.ld" -Wl,-Map,$(OUTPUT)-$$@.map -o $(OUTPUT)-$$@.elf $$^ $(LIBS)
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$(SILENT)$(NM) $(OUTPUT)-$$@.elf >$(OUTPUT)-$$@.elf.txt
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$(SILENT)$(OBJCOPY) -O binary $(OUTPUT)-$$@.elf $(OUTPUT)-$$@.bin
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$(SILENT)$(SIZE) $$^ $(OUTPUT)-$$@.elf
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$$(C_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.c Makefile $(OBJ) $(BIN)
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@echo [COMPILING $$<]
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$(SILENT)$(CC) $(CFLAGS) -DENVIRONMENT_$(1) -DENVIRONMENT=\"$(1)\" -Wa,-ahlms=$(BIN)/$$*.lst -c -o $$@ $$<
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$(SILENT)$(CC) $(CFLAGS) -DENVIRONMENT_$(1) -DENVIRONMENT=\"$(1)\" -c -o $$@ $$<
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$$(ASM_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.S Makefile $(OBJ) $(BIN)
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@echo [ASSEMBLING $$@]
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@ -151,8 +151,7 @@ WEAK void HardFault_Handler( void )
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" mrseq r0, msp \n"
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" mrsne r0, psp \n"
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//" ldr r1, [r0, #24] \n"
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" b hard_fault_handler_c\n"
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".syntax divided \n");
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" b hard_fault_handler_c\n");
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}
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/**
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