f2b94ee08e
[ Upstream commit 824927e884 ]
ARC GCC compiler is packaged starting from Fedora 39i and the GCC
variant of cross compile tools has arc-linux-gnu- prefix and not
arc-linux-. This is causing that CROSS_COMPILE variable is left unset.
This change allows builds without need to supply CROSS_COMPILE argument
if distro package is used.
Before this change:
$ make -j 128 ARCH=arc W=1 drivers/infiniband/hw/mlx4/
gcc: warning: ‘-mcpu=’ is deprecated; use ‘-mtune=’ or ‘-march=’ instead
gcc: error: unrecognized command-line option ‘-mmedium-calls’
gcc: error: unrecognized command-line option ‘-mlock’
gcc: error: unrecognized command-line option ‘-munaligned-access’
[1] https://packages.fedoraproject.org/pkgs/cross-gcc/gcc-arc-linux-gnu/index.html
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
3.3 KiB
SPDX-License-Identifier: GPL-2.0-only
Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
KBUILD_DEFCONFIG := haps_hs_smp_defconfig
ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux- arc-linux-gnu-) endif
cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
tune-mcpu-def-$(CONFIG_ISA_ARCOMPACT) := -mcpu=arc700 tune-mcpu-def-$(CONFIG_ISA_ARCV2) := -mcpu=hs38
ifeq ($(CONFIG_ARC_TUNE_MCPU),) cflags-y += $(tune-mcpu-def-y) else tune-mcpu := $(CONFIG_ARC_TUNE_MCPU) ifneq ($(call cc-option,$(tune-mcpu)),) cflags-y += $(tune-mcpu) else
The flag provided by 'CONFIG_ARC_TUNE_MCPU' option isn't known by this compiler
(probably the compiler is too old). Use ISA default mcpu flag instead as a safe option.
$(warning ** WARNING ** CONFIG_ARC_TUNE_MCPU flag '$(tune-mcpu)' is unknown, fallback to '$(tune-mcpu-def-y)') cflags-y += $(tune-mcpu-def-y) endif endif
ifdef CONFIG_ARC_CURR_IN_REG
For a global register definition, make sure it gets passed to every file
We had a customer reported bug where some code built in kernel was NOT using
any kernel headers, and missing the global register
Can't do unconditionally because of recursive include issues
due to <linux/thread_info.h>
LINUXINCLUDE += -include $(srctree)/arch/arc/include/asm/current.h cflags-y += -ffixed-gp endif
cflags-y += -fsection-anchors
cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
ifdef CONFIG_ISA_ARCV2
ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS cflags-y += -munaligned-access else cflags-y += -mno-unaligned-access endif
ifndef CONFIG_ARC_HAS_LL64 cflags-y += -mno-ll64 endif
ifndef CONFIG_ARC_HAS_DIV_REM cflags-y += -mno-div-rem endif
endif
cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI) cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi)
small data is default for elf32 tool-chain. If not usable, disable it
This also allows repurposing GP as scratch reg to gcc reg allocator
disable_small_data := y cflags-$(disable_small_data) += -mno-sdata
cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
LIBGCC = $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
Modules with short calls might break for calls into builtin-kernel
KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
Finally dump eveything into kernel build system
KBUILD_CFLAGS += $(cflags-y) KBUILD_AFLAGS += $(KBUILD_CFLAGS) KBUILD_LDFLAGS += $(ldflags-y)
w/o this dtb won't embed into kernel binary
core-y += arch/arc/boot/dts/
core-y += arch/arc/plat-sim/ core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ core-$(CONFIG_ARC_SOC_HSDK) += arch/arc/plat-hsdk/
libs-y += arch/arc/lib/ $(LIBGCC)
boot := arch/arc/boot
boot_targets := uImage.bin uImage.gz uImage.lzma
PHONY += $(boot_targets) $(boot_targets): vmlinux $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
uimage-default-y := uImage.bin uimage-default-$(CONFIG_KERNEL_GZIP) := uImage.gz uimage-default-$(CONFIG_KERNEL_LZMA) := uImage.lzma
PHONY += uImage uImage: $(uimage-default-y) @ln -sf $< $(boot)/uImage @$(kecho) ' Image $(boot)/uImage is ready'
CLEAN_FILES += $(boot)/uImage