ARC: remove gcc mpy heuristics (68d8feee) · Commits · e / devices / android_kernel_fairphone_FP3

arch/arc/Makefile

+1 −16

Original line number	Diff line number	Diff line
		@@ -25,7 +25,6 @@ ifdef CONFIG_ARC_CURR_IN_REG
		LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
		endif

		upto_gcc42 := $(call cc-ifversion, -le, 0402, y)
		upto_gcc44 := $(call cc-ifversion, -le, 0404, y)
		atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y)
		atleast_gcc48 := $(call cc-ifversion, -ge, 0408, y)
		@@ -60,25 +59,11 @@ ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
		# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
		ldflags-$(upto_gcc44) += -marclinux

		ARC_LIBGCC := -mA7
		cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16

		ifndef CONFIG_ARC_HAS_HW_MPY
		cflags-y += -mno-mpy

		# newlib for ARC700 assumes MPY to be always present, which is generally true
		# However, if someone really doesn't want MPY, we need to use the 600 ver
		# which coupled with -mno-mpy will use mpy emulation
		# With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments,
		# e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted

		ifeq ($(upto_gcc42),y)
		ARC_LIBGCC := -marc600
		cflags-y += -multcost=30
		endif
		endif

		LIBGCC := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name)
		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