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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2014-07-23 14:00:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-23 15:10:54 -0700 |
| commit | b1923b55af43a6febb976084bf30d1a4797c92c9 (patch) | |
| tree | 8d4a035658fad44ce68a3a91bf18280e9bf38d1f /arch/sh/Makefile | |
| parent | b4c5c60920e3b0c4598f43e7317559f6aec51531 (diff) | |
| download | lwn-b1923b55af43a6febb976084bf30d1a4797c92c9.tar.gz lwn-b1923b55af43a6febb976084bf30d1a4797c92c9.zip | |
sh: also try passing -m4-nofpu for SH2A builds
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/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 "$(call cc-option, ...)".
As compiling using sh4-linux-gcc is useful for compile coverage, also
try passing "-m4-nofpu" (which is presumably filtered out when using a
real sh2a-linux toolchain) to disable the generation of FPU instructions
and references to __fpscr_values[].
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Tony Breeds <tony@bakeyournoodle.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sh/Makefile')
| -rw-r--r-- | arch/sh/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/sh/Makefile b/arch/sh/Makefile index d4d16e4be07c..bf5b3f5f4962 100644 --- a/arch/sh/Makefile +++ b/arch/sh/Makefile @@ -32,7 +32,8 @@ endif cflags-$(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) |