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Hoernchen gerrit-no-reply at lists.osmocom.orgHoernchen has uploaded this change for review. ( https://gerrit.osmocom.org/c/simtrace2/+/25849 )
Change subject: clang build support
......................................................................
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
---
M firmware/Makefile
M firmware/atmel_softpack_libraries/libchip_sam3s/source/exceptions.c
2 files changed, 30 insertions(+), 11 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/simtrace2 refs/changes/49/25849/1
diff --git a/firmware/Makefile b/firmware/Makefile
index 0364166..bfe2c9d 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -73,12 +73,20 @@
# Tool suffix when cross-compiling
CROSS_COMPILE = arm-none-eabi-
-LIBS = -Wl,--start-group -lgcc -Wl,--end-group -nostdlib
-
-# Compilation tools
+USE_CLANG ?= 0
+ifneq ("$(USE_CLANG)","0")
+# --target=thumbv7m-none-eabi
+CC = clang
+LD = ld.lld
+SIZE = llvm-size
+LIBS = -nostdlib
+else
CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
SIZE = $(CROSS_COMPILE)size
+LIBS = -Wl,--start-group -lgcc -Wl,--end-group -nostdlib
+endif
+
STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
GDB = $(CROSS_COMPILE)gdb
@@ -139,7 +147,11 @@
#CFLAGS+=-DUSB_NO_DEBUG=1
# Optimization level, put in comment for debugging
+ifneq ("$(USE_CLANG)","0")
+OPTIMIZATION ?= -Oz
+else
OPTIMIZATION ?= -Os
+endif
# Flags
INCLUDES_USB = -I$(AT91LIB)/usb/include -I$(AT91LIB)
@@ -153,6 +165,11 @@
INCLUDES += -Isrc_simtrace -Iinclude
INCLUDES += -Iapps/$(APP)
+ifneq ("$(USE_CLANG)","0")
+CFLAGS += -Wno-unknown-warning-option -Wno-empty-body -fno-exceptions -fno-unwind-tables --config armv7em_soft_nofp_nosys
+else
+CFLAGS += -Wno-suggest-attribute=noreturn --param max-inline-insns-single=500
+endif
CFLAGS += -Wall -Wchar-subscripts -Wcomment -Wimplicit-int -Wformat=2
CFLAGS += -Werror-implicit-function-declaration -Wmain -Wparentheses
CFLAGS += -Wsequence-point -Wreturn-type -Wswitch -Wtrigraphs #-Wunused
@@ -165,16 +182,16 @@
CFLAGS += -Wunreachable-code
#CFLAGS += -Wcast-align
#CFLAGS += -std=c11
-CFLAGS += -Wmissing-noreturn
+#CFLAGS += -Wmissing-noreturn
#CFLAGS += -Wconversion
CFLAGS += -Wno-unused-but-set-variable -Wno-unused-variable
-CFLAGS += -Wno-suggest-attribute=noreturn
+
# -mlong-calls -Wall
#CFLAGS += -save-temps -fverbose-asm
#CFLAGS += -Wa,-a,-ad
CFLAGS += -D__ARM -fno-builtin
-CFLAGS += --param max-inline-insns-single=500 -mcpu=cortex-m3 -mthumb # -mfix-cortex-m3-ldrd
+CFLAGS += -mcpu=cortex-m3 -mthumb # -mfix-cortex-m3-ldrd
CFLAGS += -ffunction-sections -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -DTRACE_LEVEL=$(TRACE_LEVEL) -DALLOW_PEER_ERASE=$(ALLOW_PEER_ERASE)
CFLAGS += -DGIT_VERSION=\"$(GIT_VERSION)\"
CFLAGS += -DBOARD=\"$(BOARD)\" -DBOARD_$(BOARD)
@@ -188,7 +205,10 @@
endif
ASFLAGS = -mcpu=cortex-m3 -mthumb -Wall -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -D__ASSEMBLY__
-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)
+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 $(LIB)
+ifeq ("$(USE_CLANG)","0")
+LDFLAGS += -Wl,--warn-section-align -Wl,--print-memory-usage
+endif
#LD_OPTIONAL=-Wl,--print-gc-sections -Wl,--stats
# Append BIN directories to output filename
@@ -227,14 +247,14 @@
ASM_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(ASM_OBJECTS))
$(1): $$(ASM_OBJECTS_$(1)) $$(C_OBJECTS_$(1))
- $(SILENT)$(CC) $(LDFLAGS) $(LD_OPTIONAL) -T"libboard/common/resources/$(CHIP)/$$@.ld" -Wl,-Map,$(OUTPUT)-$$@.map -o $(OUTPUT)-$$@.elf $$^ $(LIBS)
+ $(SILENT)$(CC) $(CFLAGS) $(LDFLAGS) $(LD_OPTIONAL) -T"libboard/common/resources/$(CHIP)/$$@.ld" -Wl,-Map,$(OUTPUT)-$$@.map -o $(OUTPUT)-$$@.elf $$^ $(LIBS)
$(SILENT)$(NM) $(OUTPUT)-$$@.elf >$(OUTPUT)-$$@.elf.txt
$(SILENT)$(OBJCOPY) -O binary $(OUTPUT)-$$@.elf $(OUTPUT)-$$@.bin
$(SILENT)$(SIZE) $$^ $(OUTPUT)-$$@.elf
$$(C_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.c Makefile $(OBJ) $(BIN)
@echo [COMPILING $$<]
- $(SILENT)$(CC) $(CFLAGS) -DENVIRONMENT_$(1) -DENVIRONMENT=\"$(1)\" -Wa,-ahlms=$(BIN)/$$*.lst -c -o $$@ $$<
+ $(SILENT)$(CC) $(CFLAGS) -DENVIRONMENT_$(1) -DENVIRONMENT=\"$(1)\" -c -o $$@ $$<
$$(ASM_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.S Makefile $(OBJ) $(BIN)
@echo [ASSEMBLING $$@]
diff --git a/firmware/atmel_softpack_libraries/libchip_sam3s/source/exceptions.c b/firmware/atmel_softpack_libraries/libchip_sam3s/source/exceptions.c
index 4799eae..7496f3a 100644
--- a/firmware/atmel_softpack_libraries/libchip_sam3s/source/exceptions.c
+++ b/firmware/atmel_softpack_libraries/libchip_sam3s/source/exceptions.c
@@ -151,8 +151,7 @@
" mrseq r0, msp \n"
" mrsne r0, psp \n"
//" ldr r1, [r0, #24] \n"
- " b hard_fault_handler_c\n"
- ".syntax divided \n");
+ " b hard_fault_handler_c\n");
}
/**
--
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Gerrit-Project: simtrace2
Gerrit-Branch: master
Gerrit-Change-Id: I1a19f40d44797efad5c46121e73115ed738a095b
Gerrit-Change-Number: 25849
Gerrit-PatchSet: 1
Gerrit-Owner: Hoernchen <ewild at sysmocom.de>
Gerrit-MessageType: newchange
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