Issues with compiler flags in gfortran

[Nicolas Pavillon]

> 
> The MacPorts provided as, from cctools, is *supposed* to be the same as that provided by Xcode 10. Actually, one thing you have not said is what macOS version are you using ?
> 
Sure, sorry. I did not think it would be important at the time.

- Mac OS 10.14.2
- Xcode 10.1

> Chris
> 
>> Cheers,
>> Nicolas
>>> On Jan 22, 2019, at 11:23, Chris Jones <jonesc at hep.phy.cam.ac.uk <mailto:jonesc at hep.phy.cam.ac.uk>> wrote:
>>> 
>>> Hi,
>>> 
>>> Could you then please try either removing the cctools package, or reinstall it with the xcode variant. Either should result in the build using the xcode provided as instead.
>>> 
>>> Chris
>>> 
>>> On 21 Jan 2019, at 3:54 pm, Nicolas Pavillon <nicos at macports.org <mailto:nicos at macports.org>> wrote:
>>> 
>>>> 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 <mailto: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://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 
>>>>