arnoldi tests failing with MKL blas on recent master

[dmbates]

Using

julia> versioninfo()
Julia Version 0.4.0-dev+5679
Commit 7c65815 (2015-06-28 19:05 UTC)
Platform Info:
  System: Linux (x86_64-linux-gnu)
  CPU: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
  WORD_SIZE: 64
  BLAS: libmkl_rt
  LAPACK: libmkl_rt
  LIBM: libimf
  LLVM: libLLVM-3.6.1

I get a segfault in test/linalg/arnoldi.jl

signal (11): Segmentation fault
mkl_blas_avx2_zdotc at /opt/intel/composer_xe_2015.3.187/mkl/lib/intel64/libmkl_avx2.so (unknown line)
zneupd_ at /home/bates/git/julia4/usr/bin/../lib/libarpack.so (unknown line)

[ViralBShah]

I believe it has always failed - due to differences in the Fortran calling conventions.

[ViralBShah]

See the resolution in #7547. The real solution though is #2167.

[tkelman]

I think @dmbates answered this question earlier today but he was on the other side of the room and I didn't entirely hear him, is this copy of Julia built with all-Intel compilers along with MKL? I think that's the main configuration we attempt to support, rather than mixing MKL and gfortran.

[ViralBShah]

I am closing this one, since the two other issues I refer to cover this.

[StefanKarpinski]

@ViralBShah, could you provide an answer to @tkelman's question for future reference? Maybe document it if that's the case?

[ViralBShah]

@tkelman 's question is answered in #7547, but that may not be immediately obvious from my comments. Basically - build everything with intel compilers if you want to use MKL.

[kshyatt]

Hasn't building Julia with icc on Windows been broken for over a year? I don't know if MKL is even supposed to work on Windows, but if it is, that kind of sucks.

[jiahao]

ICC v15 works, but not v14

[kshyatt]

Awesome, thanks for the info!

[jiahao]

Not sure about Windoze, sorry. Compiling Julia with icc has been borked on Linux also.

[tkelman]

On Windows, icc and ifort are visual-studio-style, so they might sort of work but no one has tried AFAIK. Windows ifort also does not use trailing underscores, so lots of patches would be required (or a dedicated fcall).

[ViralBShah]

Won't there be some command line option to turn on the right number of underscores?

[tkelman]

I don't think that is available on the Windows version of ifort.