Add support for Perl built with C++

[pmqs]

For Perl XS modules, particularly those in the core, you need your module to support being build with a Perl binary created with a C++ compiler.

I'm just updating Compress-Raw-Zlib with a C- related change that gets stung with this use-case more often that I'd like. The typical workflow goes like tis

• I update the module, forgetting to test the C++ use case
• code gets uploaded to CPAN
• the smokes run but they fail with the C++ builds
• I scramble to fix the issue & upload a to CPAN

I have all of the use-cases I need cooked into my GitHub actions, but this one is missing. Any chance of adding C++ support?

[shogo82148]

I have never built Perl with C++.
How do I do that?

[pmqs]

At the configure stage just use Dcc to use a C++ compiler rather that the default C compiler.

configure -Dcc=g++ ...

or this for clang

configure -Dcc=clang++ ...

[shogo82148]

I did.
However, I don't want to add more variant of perl binaries.