UTS_MACHINE := arc
ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := arc-elf32-
+CROSS_COMPILE := arc-linux-uclibc-
endif
KBUILD_DEFCONFIG := fpga_defconfig
LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
endif
-atleast_gcc44 := $(call cc-ifversion, -gt, 0402, y)
+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 := $(call cc-ifversion, -ge, 0408, y)
+
cflags-$(atleast_gcc44) += -fsection-anchors
cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc
cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
+# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
+ifeq ($(atleast_gcc48),y)
+cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2
+endif
+
ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
# Generic build system uses -O2, we want -O3
cflags-y += -O3
cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
-# STAR 9000518362:
+# STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
-# --build-id w/o "-marclinux".
-# Default arc-elf32-ld is OK
-ldflags-y += -marclinux
+# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
+ldflags-$(upto_gcc44) += -marclinux
ARC_LIBGCC := -mA7
cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16
# With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments,
# e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted
- ARC_LIBGCC := -marc600
- ifneq ($(atleast_gcc44),y)
+ ifeq ($(upto_gcc42),y)
+ ARC_LIBGCC := -marc600
cflags-y += -multcost=30
endif
endif