diff options
Diffstat (limited to 'Makefile')
-rw-r--r-- | Makefile | 66 |
1 files changed, 59 insertions, 7 deletions
@@ -76,26 +76,54 @@ OPENSBI_VERSION_MINOR=`grep "define OPENSBI_VERSION_MINOR" $(include_dir)/sbi/sb OPENSBI_VERSION_GIT=$(shell if [ -d $(src_dir)/.git ]; then git describe 2> /dev/null; fi) # Setup compilation commands +ifneq ($(LLVM),) +CC = clang +AR = llvm-ar +LD = ld.lld +OBJCOPY = llvm-objcopy +else ifdef CROSS_COMPILE CC = $(CROSS_COMPILE)gcc -CPP = $(CROSS_COMPILE)cpp AR = $(CROSS_COMPILE)ar LD = $(CROSS_COMPILE)ld OBJCOPY = $(CROSS_COMPILE)objcopy else CC ?= gcc -CPP ?= cpp AR ?= ar LD ?= ld OBJCOPY ?= objcopy endif +endif +CPP = $(CC) -E AS = $(CC) DTC = dtc -# Guess the compillers xlen -OPENSBI_CC_XLEN := $(shell TMP=`$(CC) -dumpmachine | sed 's/riscv\([0-9][0-9]\).*/\1/'`; echo $${TMP}) +ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) +CC_IS_CLANG = y +else +CC_IS_CLANG = n +endif + +ifneq ($(shell $(LD) --version 2>&1 | head -n 1 | grep LLD),) +LD_IS_LLD = y +else +LD_IS_LLD = n +endif + +ifeq ($(CC_IS_CLANG),y) +ifneq ($(CROSS_COMPILE),) +CLANG_TARGET = --target=$(notdir $(CROSS_COMPILE:%-=%)) +endif +endif + +# Guess the compiler's XLEN +OPENSBI_CC_XLEN := $(shell TMP=`$(CC) $(CLANG_TARGET) -dumpmachine | sed 's/riscv\([0-9][0-9]\).*/\1/'`; echo $${TMP}) + +# Guess the compiler's ABI and ISA +ifneq ($(CC_IS_CLANG),y) OPENSBI_CC_ABI := $(shell TMP=`$(CC) -v 2>&1 | sed -n 's/.*\(with\-abi=\([a-zA-Z0-9]*\)\).*/\2/p'`; echo $${TMP}) OPENSBI_CC_ISA := $(shell TMP=`$(CC) -v 2>&1 | sed -n 's/.*\(with\-arch=\([a-zA-Z0-9]*\)\).*/\2/p'`; echo $${TMP}) +endif # Setup platform XLEN ifndef PLATFORM_RISCV_XLEN @@ -106,8 +134,21 @@ ifndef PLATFORM_RISCV_XLEN endif endif +ifeq ($(CC_IS_CLANG),y) +ifeq ($(CROSS_COMPILE),) +CLANG_TARGET = --target=riscv$(PLATFORM_RISCV_XLEN)-unknown-elf +endif +endif + +ifeq ($(LD_IS_LLD),y) +RELAX_FLAG = -mno-relax +USE_LD_FLAG = -fuse-ld=lld +else +USE_LD_FLAG = -fuse-ld=bfd +endif + # Check whether the linker supports creating PIEs -OPENSBI_LD_PIE := $(shell $(CC) -fPIE -nostdlib -Wl,-pie -x c /dev/null -o /dev/null >/dev/null 2>&1 && echo y || echo n) +OPENSBI_LD_PIE := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) $(USE_LD_FLAG) -fPIE -nostdlib -Wl,-pie -x c /dev/null -o /dev/null >/dev/null 2>&1 && echo y || echo n) # Setup list of objects.mk files ifdef PLATFORM @@ -197,7 +238,11 @@ else endif # Setup compilation commands flags -GENFLAGS = -I$(platform_src_dir)/include +ifeq ($(CC_IS_CLANG),y) +GENFLAGS += $(CLANG_TARGET) +GENFLAGS += -Wno-unused-command-line-argument +endif +GENFLAGS += -I$(platform_src_dir)/include GENFLAGS += -I$(include_dir) ifneq ($(OPENSBI_VERSION_GIT),) GENFLAGS += -DOPENSBI_VERSION_GIT="\"$(OPENSBI_VERSION_GIT)\"" @@ -211,6 +256,7 @@ CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls CFLAGS += -mno-save-restore -mstrict-align CFLAGS += -mabi=$(PLATFORM_RISCV_ABI) -march=$(PLATFORM_RISCV_ISA) CFLAGS += -mcmodel=$(PLATFORM_RISCV_CODE_MODEL) +CFLAGS += $(RELAX_FLAG) CFLAGS += $(GENFLAGS) CFLAGS += $(platform-cflags-y) CFLAGS += -fno-pie -no-pie @@ -225,18 +271,24 @@ ASFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls ASFLAGS += -mno-save-restore -mstrict-align ASFLAGS += -mabi=$(PLATFORM_RISCV_ABI) -march=$(PLATFORM_RISCV_ISA) ASFLAGS += -mcmodel=$(PLATFORM_RISCV_CODE_MODEL) +ASFLAGS += $(RELAX_FLAG) ASFLAGS += $(GENFLAGS) ASFLAGS += $(platform-asflags-y) ASFLAGS += $(firmware-asflags-y) ARFLAGS = rcs -ELFFLAGS += -Wl,--build-id=none -N -static-libgcc -lgcc +ELFFLAGS += $(USE_LD_FLAG) +ELFFLAGS += -Wl,--build-id=none -Wl,-N -static-libgcc -lgcc ELFFLAGS += $(platform-ldflags-y) ELFFLAGS += $(firmware-ldflags-y) MERGEFLAGS += -r +ifeq ($(LD_IS_LLD),y) +MERGEFLAGS += -b elf +else MERGEFLAGS += -b elf$(PLATFORM_RISCV_XLEN)-littleriscv +endif MERGEFLAGS += -m elf$(PLATFORM_RISCV_XLEN)lriscv DTSCPPFLAGS = $(CPPFLAGS) -nostdinc -nostdlib -fno-builtin -D__DTS__ -x assembler-with-cpp |