On Friday, September 24, 2021 at 4:23:32 AM UTC-7 Dima Pasechnik wrote:

>
> On Fri, 24 Sep 2021, 02:12 Matthias Koeppe, <matthia...@gmail.com> wrote:
>
>> I repeat my strong objections to the proposed change -- which does not 
>> solve any problems and only creates new ones.
>> 7. (As I explained before in 
>> https://trac.sagemath.org/ticket/32532#comment:11) in particular, Python 
>> users / developers generally have a working gcc (because many Python 
>> packages include extension modules that need to be compiled) but they have 
>> no need to have gfortran installed. The reason is that the few Python 
>> packages that use gfortran (such as scipy) have high-quality deployments of 
>> wheels to PyPI, which are widely used. Sage, however, does not yet have a 
>> working strategy that would enable us to use wheels from PyPI. As you know, 
>> I have been working on a PyPI-based deployment solution for Sage in 
>> https://trac.sagemath.org/ticket/29039; this builds everything from 
>> source. 
>>
>  
> Why does it build everything from source? E.g. numpy doesn't build Fortran 
> compilers.
> Why do we have to outdo other Python projects here?
>

I have explained in the paragraph that you quoted (and previously in 
#32532). Wheels. They have wheels. We don't.


 

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