I thought that it was the Configure step of building Perl that knew how to select compiler command-line arguments for cc vs. gcc. I thought that MakeMaker just pulled out the one set of compiler options that Configure stuffed into Config.pm and so doesn't know how to adjust compiler command-line options based on cc vs. gcc.

Therefore, I don't expect CC=gcc to work when building a module (unless you get very lucky), only when building Perl itself.

The best rule is to build modules using the same environment that was used to build Perl. If I wanted to use gcc to build modules but Config.pm wanted to use cc, then I'd probably grab the source code to Perl and build it with gcc.

                - tye