Issues with compiler flags in gfortran
nicos at macports.org
Mon Jan 21 15:54:58 UTC 2019
I just tried that, and I think I have been using the current default:
NicolasMacBook:~ nicos$ port installed cctools
The following ports are currently installed:
cctools @921_0+llvm70 (active)
The reason I have been mentioning how old as might be is that the one provided by cctools returns version 1.38, which quite behind compared to the version provided by binutils, for example.
Apple Inc version cctools-921, GNU assembler version 1.38
> On Jan 22, 2019, at 0:23, Chris Jones <jonesc at hep.phy.cam.ac.uk> wrote:
> What exactly version (and variants) of cctools do you have installed ?
> Perhaps try force removing it, then reinstall, to make sure you are using the current default variants.
> On 21 Jan 2019, at 2:47 pm, Nicolas Pavillon <nicos at macports.org <mailto:nicos at macports.org>> wrote:
>> I stumbled on some issues with the fortran compiler that I cannot really understand. They might be linked with other topics discussed recently about cctools, but it still seems somewhat different.
>> This happens with the port OpenBLAS, where the compilation fails when flags to compile AVX instructions yield errors during compilation, as described in the following tickets:
>> https://trac.macports.org/ticket/57912 <https://trac.macports.org/ticket/57912>
>> https://github.com/xianyi/OpenBLAS/issues/1951 <https://github.com/xianyi/OpenBLAS/issues/1951>
>> However, when I tried even more basic flags such as -march=native, compilation also fails with errors such as
>> /var/folders/x8/q7j02h4d661_p7cjh42_jh380000gn/T//ccqkNy6A.s:103:no such instruction: `vxorps %xmm0, %xmm0,%xmm0'
>> I then tried with another gfortran compiler outside of macports, and it could compile without any issue if I remove macports’ prefix from the path, which seems to indicate that the issue is coming from the assembler in macports.
>> My best guess is that as in cctools is too old, but I am not sure about that. Also, if it is correct, I wonder how this could be solved. Any ideas?
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