Yes, I have read the The Wikipedia article, Perl XS, that states:

XS is an interface through which a program written in the Perl programming language can call a C or C++ language subroutine. The letters stand for eXternal Subroutine, or xsub, where external means external to Perl, i.e. written in some other language.

. . .XS modules are not without drawbacks. They are difficult to write and maintain, and they may only be installed if a C compiler and the header files that the Perl interpreter was compiled against are available. Also, new versions of Perl may break binary compatibility; if this happens, all XS modules must be recompiled.

I did deinstall before reinstalling the FreeBSD "Ports". I expected the same compiler, clang?, to compile and assemble both??? . . .of course, I did not write the makefile.