Binutils too old to support AVX2

[Dave Yeo]

While GCC reports AVX2 is available,

# gcc -mavx2 -dM -E - < /dev/null | egrep "AVX" | sort
#define __AVX__ 1
#define __AVX2__ 1

AS errors out when compiling AVX2 code, eg from flac git head,

R:/tmp/ccwvrScM.s:8773: Error: operand type mismatch for `vpsrlq'
R:/tmp/ccwvrScM.s:8778: Error: no such instruction: `vpermd %ymm1,%ymm5,%ymm0'
R:/tmp/ccwvrScM.s:8859: Error: operand type mismatch for `vpmovzxdq'

Our binutils version 2.21 is close to 5 years old and Paul's newest release is binutils v2.25 2015-01-08.

[Silvan Scherrer]

please try binutils from exp repo.

[Dave Yeo]

Errors out with

Test Transaction Errors: file /@unixroot/usr/include/libiberty.h from install of binutils-devel-2.25-1.oc00.i686 conflicts with file from package libc-devel- 0.6.6-26.oc00.i386

I usually go with the binutils version when updating my non-rpm environment.

[Silvan Scherrer]

That's a libc rpm error it seems. Even I didn't get this problem while creating and testing the rpm. I have the feeling it might also be because of the i386 vs i686 issue. We will make sure we fix the libc rpm.

And btw this binutils version differs from Pauls build. It's not just a repack of his.

[Silvan Scherrer]

And btw to have a working binutils you would not need the devel part. The devel only installs header files and .a files. Which is only needed if you want to link against binutils stuff

[Silvan Scherrer]

libc rpm is fixed in r794.

please retry and reopen this issue again, if still a problem.