gmp refuses to build c++ headers

[Hans Åberg]

> On 5 Aug 2020, at 09:41, Emmanuel Thomé <emmanuel.thome at gmail.com> wrote:
> 
> My gmp-6.2.0, on MacOS 10.15, compiles fine with the configure command
> line you provided.
> Exactly as you said: I downloaded the file from GMP’s website,
> unpacked it, changed to the directory, then:
>   ./configure CC=clang CXX=clang++ --enable-cxx
>   make

There is an ambiguity here, as we do not get to know which clang: In the original installation, it and gcc both point to the Apple inhouse version of clang.

The report should also have given the result of 'clang --version'.