diff options
Diffstat (limited to 'arch/sh/Makefile')
| -rw-r--r-- | arch/sh/Makefile | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/arch/sh/Makefile b/arch/sh/Makefile index fac1567b2afb..ad0096151781 100644 --- a/arch/sh/Makefile +++ b/arch/sh/Makefile @@ -35,11 +35,21 @@ cflags-$(CONFIG_CPU_SH4A) += $(call cc-option,-m4a,) \ cflags-$(CONFIG_CPU_SH4AL_DSP) += $(call cc-option,-m4al,) cflags-$(CONFIG_CPU_SH5) := $(call cc-option,-m5-32media-nofpu,) -cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mb -cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -ml - -cflags-y += $(call cc-option,-mno-fdpic) - +ifeq ($(cflags-y),) +# +# In the case where we are stuck with a compiler that has been uselessly +# restricted to a particular ISA, a favourite default of newer GCCs when +# extensive multilib targets are not provided, ensure we get the best fit +# regarding FP generation. This is intentionally stupid (albeit many +# orders of magnitude less than GCC's default behaviour), as anything +# with a large number of multilib targets better have been built +# correctly for the target in mind. +# +cflags-y += $(shell $(CC) $(KBUILD_CFLAGS) -print-multi-lib | \ + grep nofpu | sed q | sed -e 's/^/-/;s/;.*$$//') +# At this point, anything goes. +isaflags-y := $(call as-option,-Wa$(comma)-isa=any,) +else # # -Wa,-isa= tuning implies -Wa,-dsp for the versions of binutils that # support it, while -Wa,-dsp by itself limits the range of usable opcodes @@ -52,7 +62,12 @@ isaflags-y := $(call as-option,-Wa$(comma)-isa=$(isa-y),) isaflags-$(CONFIG_SH_DSP) := \ $(call as-option,-Wa$(comma)-isa=$(isa-y),-Wa$(comma)-dsp) +endif + +cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mb +cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -ml +cflags-y += $(call cc-option,-mno-fdpic) cflags-y += $(isaflags-y) -ffreestanding cflags-$(CONFIG_MORE_COMPILE_OPTIONS) += \ |