| Message ID | 20200324001358.4520-2-masahiroy@kernel.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Herbert Xu |
| Headers | show |
| Series | x86: remove always-defined CONFIG_AS_* options | expand |
On 2020-03-23 17:13, Masahiro Yamada wrote: > You can test raid6 library code from user-space, like this: > > $ cd lib/raid6/test > $ make > > The command in $(shell ...) function is evaluated by /bin/sh by default. > (or, you can change the default shell by setting 'SHELL' in Makefile) > > Currently '>&/dev/null' is used to sink both stdout and stderr. Because > this code is bash-ism, it only works when /bin/sh is a symbolic link to > bash (this is the case on RHEL etc.) > > This does not work on Ubuntu where /bin/sh is a symbolic link to dash. > > I see lots of > > /bin/sh: 1: Syntax error: Bad fd number > > and > > warning "your version of binutils lacks ... support" > > Replace it with portable '>/dev/null 2>&1'. > > Fixes: 4f8c55c5ad49 ("lib/raid6: build proper files on corresponding arch") > Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: H. Peter Anvin (Intel) <hpa@zytor.com> > --- > > Changes in v2: > - New patch > > lib/raid6/test/Makefile | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile > index 3ab8720aa2f8..b9e6c3648be1 100644 > --- a/lib/raid6/test/Makefile > +++ b/lib/raid6/test/Makefile > @@ -35,13 +35,13 @@ endif > ifeq ($(IS_X86),yes) > OBJS += mmx.o sse1.o sse2.o avx2.o recov_ssse3.o recov_avx2.o avx512.o recov_avx512.o > CFLAGS += $(shell echo "pshufb %xmm0, %xmm0" | \ > - gcc -c -x assembler - >&/dev/null && \ > + gcc -c -x assembler - >/dev/null 2>&1 && \ > rm ./-.o && echo -DCONFIG_AS_SSSE3=1) > CFLAGS += $(shell echo "vpbroadcastb %xmm0, %ymm1" | \ > - gcc -c -x assembler - >&/dev/null && \ > + gcc -c -x assembler - >/dev/null 2>&1 && \ > rm ./-.o && echo -DCONFIG_AS_AVX2=1) > CFLAGS += $(shell echo "vpmovm2b %k1, %zmm5" | \ > - gcc -c -x assembler - >&/dev/null && \ > + gcc -c -x assembler - >/dev/null 2>&1 && \ > rm ./-.o && echo -DCONFIG_AS_AVX512=1) > else ifeq ($(HAS_NEON),yes) > OBJS += neon.o neon1.o neon2.o neon4.o neon8.o recov_neon.o recov_neon_inner.o >
diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile index 3ab8720aa2f8..b9e6c3648be1 100644 --- a/lib/raid6/test/Makefile +++ b/lib/raid6/test/Makefile @@ -35,13 +35,13 @@ endif ifeq ($(IS_X86),yes) OBJS += mmx.o sse1.o sse2.o avx2.o recov_ssse3.o recov_avx2.o avx512.o recov_avx512.o CFLAGS += $(shell echo "pshufb %xmm0, %xmm0" | \ - gcc -c -x assembler - >&/dev/null && \ + gcc -c -x assembler - >/dev/null 2>&1 && \ rm ./-.o && echo -DCONFIG_AS_SSSE3=1) CFLAGS += $(shell echo "vpbroadcastb %xmm0, %ymm1" | \ - gcc -c -x assembler - >&/dev/null && \ + gcc -c -x assembler - >/dev/null 2>&1 && \ rm ./-.o && echo -DCONFIG_AS_AVX2=1) CFLAGS += $(shell echo "vpmovm2b %k1, %zmm5" | \ - gcc -c -x assembler - >&/dev/null && \ + gcc -c -x assembler - >/dev/null 2>&1 && \ rm ./-.o && echo -DCONFIG_AS_AVX512=1) else ifeq ($(HAS_NEON),yes) OBJS += neon.o neon1.o neon2.o neon4.o neon8.o recov_neon.o recov_neon_inner.o
You can test raid6 library code from user-space, like this: $ cd lib/raid6/test $ make The command in $(shell ...) function is evaluated by /bin/sh by default. (or, you can change the default shell by setting 'SHELL' in Makefile) Currently '>&/dev/null' is used to sink both stdout and stderr. Because this code is bash-ism, it only works when /bin/sh is a symbolic link to bash (this is the case on RHEL etc.) This does not work on Ubuntu where /bin/sh is a symbolic link to dash. I see lots of /bin/sh: 1: Syntax error: Bad fd number and warning "your version of binutils lacks ... support" Replace it with portable '>/dev/null 2>&1'. Fixes: 4f8c55c5ad49 ("lib/raid6: build proper files on corresponding arch") Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> --- Changes in v2: - New patch lib/raid6/test/Makefile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)