Please suggest a compiler given these errors

[Mayuresh <mayuresh%acm.org@localhost>]

The README of the package (pytorch, being built in wip/py-torch) says:

    #### Prerequisites
    ...
        - A C++14 compatible compiler, such as clang

I don't think it is mandating clang

This build is on NetBSD 9.1 amd64 and the default compiler is the
following, which I suppose supports C++14

    # gcc --version
    gcc (nb4 20200810) 7.5.0


However my impression from the following errors is it's something to do
with the choice of compiler:

    # grep error: /usr/local/netbsd/work/wip/py-torch/work/pytorch/build/CMakeFiles/CMakeError.log
    /usr/include/gcc-7/avxintrin.h:1311:1: error: inlining failed in call to always_inline '_mm256_set1_ps': target specific option mismatch
    /usr/include/gcc-7/avxintrin.h:551:1: error: inlining failed in call to always_inline '_mm256_extract_epi64': target specific option mismatch
    /usr/include/gcc-7/avx2intrin.h:63:1: error: inlining failed in call to always_inline '_mm256_abs_epi16': target specific option mismatch
    /usr/local/netbsd/work/wip/py-torch/work/pytorch/build/CMakeFiles/CMakeTmp/src.c:6:17: error: incompatible types when initializing type '__m512i {aka __vector(8) long long int}' using type 'int'
    /usr/local/netbsd/work/wip/py-torch/work/pytorch/build/CMakeFiles/CMakeTmp/src.c:6:17: error: incompatible types when initializing type '__m512i {aka __vector(8) long long int}' using type 'int'
    gcc: error: /arch:AVX512: No such file or directory
    /usr/include/gcc-7/avxintrin.h:1311:1: error: inlining failed in call to always_inline '_mm256_set1_ps': target specific option mismatch
    /usr/include/gcc-7/avxintrin.h:551:1: error: inlining failed in call to always_inline '_mm256_extract_epi64': target specific option mismatch
    /usr/include/gcc-7/avx2intrin.h:63:1: error: inlining failed in call to always_inline '_mm256_abs_epi16': target specific option mismatch
    /usr/local/netbsd/work/wip/py-torch/work/pytorch/build/CMakeFiles/CMakeTmp/src.c:6:17: error: incompatible types when initializing type '__m512i {aka __vector(8) long long int}' using type 'int'
    /usr/local/netbsd/work/wip/py-torch/work/pytorch/build/CMakeFiles/CMakeTmp/src.c:6:17: error: incompatible types when initializing type '__m512i {aka __vector(8) long long int}' using type 'int'
    gcc: error: /arch:AVX512: No such file or directory
    g++: error: unrecognized command line option '-Wshorten-64-to-32'
    g++: error: unrecognized command line option '-Wshorten-64-to-32'
    g++: error: unrecognized command line option '-wd654'
    g++: error: unrecognized command line option '-wd654'
    g++: error: unrecognized command line option '-Wthread-safety'; did you mean '-fthread-jumps'?
    g++: error: unrecognized command line option '-Wthread-safety'; did you mean '-fthread-jumps'?
    /usr/local/netbsd/work/wip/py-torch/work/pytorch/build/CMakeFiles/CMakeTmp/CheckPrototypeDefinition.c:1:10: fatal error: magma.h: No such file or directory

Shall I be trying out clang and what does it mean to dependencies - do they
have to use the same compiler? So far a buildlink dependency is found on
devel/google-glog

-- 
Mayuresh