Issues with compiler flags in gfortran

[Nicolas Pavillon]

Hi, 

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.

/opt/local/bin/as -v
Apple Inc version cctools-921, GNU assembler version 1.38

Cheers,

Nicolas

> On Jan 22, 2019, at 0:23, Chris Jones <jonesc at hep.phy.cam.ac.uk> wrote:
> 
> Hi,
> 
> 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. 
> 
> Chris
> 
> On 21 Jan 2019, at 2:47 pm, Nicolas Pavillon <nicos at macports.org <mailto:nicos at macports.org>> wrote:
> 
>> Hi, 
>> 
>> 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?
>> 
>> Cheers,
>> 
>> Nicolas 

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