Messages in this thread Patch in this message | | | From | Geert Uytterhoeven <> | Subject | [PATCH] sh: Also try passing -m4-nofpu for SH2A builds | Date | Tue, 8 Jul 2014 23:32:24 +0200 |
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When compiling a SH2A kernel (e.g. se7206_defconfig or rsk7203_defconfig) using sh4-linux-gcc, linking fails with:
net/built-in.o: In function `__sk_run_filter': net/core/filter.c:566: undefined reference to `__fpscr_values' net/core/filter.c:269: undefined reference to `__fpscr_values' net/core/filter.c:269: undefined reference to `__fpscr_values' net/core/filter.c:269: undefined reference to `__fpscr_values' net/core/filter.c:269: undefined reference to `__fpscr_values' net/built-in.o:net/core/filter.c:580: more undefined references to `__fpscr_values' follow
This happens because sh4-linux-gcc doesn't support the "-m2a-nofpu", which is thus filtered out by "$(call cc-option, ...)".
As compiling using sh4-linux-gcc is useful for compile coverage, also try passing "-m4-nofpu" (which is presumably filtered out when using a real sh2a-linux toolchain) to disable the generation of FPU instructions and references to __fpscr_values[].
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- arch/sh/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/sh/Makefile b/arch/sh/Makefile index d4d16e4be07c..bf5b3f5f4962 100644 --- a/arch/sh/Makefile +++ b/arch/sh/Makefile @@ -32,7 +32,8 @@ endif cflags-$(CONFIG_CPU_SH2) := $(call cc-option,-m2,) cflags-$(CONFIG_CPU_SH2A) += $(call cc-option,-m2a,) \ - $(call cc-option,-m2a-nofpu,) + $(call cc-option,-m2a-nofpu,) \ + $(call cc-option,-m4-nofpu,) cflags-$(CONFIG_CPU_SH3) := $(call cc-option,-m3,) cflags-$(CONFIG_CPU_SH4) := $(call cc-option,-m4,) \ $(call cc-option,-mno-implicit-fp,-m4-nofpu) -- 1.9.1
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