Perl archname for CPAN modules

Question

Consider this CPAN Tester Matrix Report for OSX.

Sometimes archname is darwin-2level ,sometimes its darwin-thread-multi-2level . I understand that it refers to if you are using Perl compiled with -Dusethreads flag or not.

1) But does that also signify that given module such as XML::LibXML or XML::LibXSLT is also compiled using/not using thread flag ?

2) Are there any such settings by which we can compile XML::LibXML and XML::LibXSLT with thread flags ?

3) Does the archname in the above report mandate that it will only work with Perl that is compiled without -Dusethreads flag ?

Answer 1

When you install a module the same compiler flags are used for compiling the module that the flags used for compiling perl. Unless the module author decided otherwise in the Makefile.PL / Build.PL of the distribution.

Using different usethreads for a module than from the perl in which it will run would be dangerous (if even possible).