Tell the compiler to provide mnemonics for instructions we depend on, such as 'pause'. Specifying march also allows extensions which affect compilation to be individually [un]selected. For example, building without compressed (2 byte) instructions may be desirable, so 'c' may be removed from the march isa string. Signed-off-by: Andrew Jones <andrew.jones@xxxxxxxxx> Acked-by: Thomas Huth <thuth@xxxxxxxxxx> --- riscv/Makefile | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/riscv/Makefile b/riscv/Makefile index 4a83f27f7df2..697a3beb2703 100644 --- a/riscv/Makefile +++ b/riscv/Makefile @@ -55,8 +55,13 @@ define arch_elf_check = $(error $(1) has unsupported reloc types)) endef +ISA_COMMON = mafdc_zicsr_zifencei_zihintpause + ifeq ($(ARCH),riscv64) +CFLAGS += -march=rv64i$(ISA_COMMON) CFLAGS += -DCONFIG_64BIT +else ifeq ($(ARCH),riscv32) +CFLAGS += -march=rv32i$(ISA_COMMON) endif CFLAGS += -DCONFIG_RELOC CFLAGS += -mcmodel=medany -- 2.43.0
