[Bug modula2/125129] Many tests fail to link on FreeBSD

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125129

Gaius Mulley <gaius at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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  Attachment #64976|0                           |1
        is obsolete|                            |

--- Comment #11 from Gaius Mulley <gaius at gcc dot gnu.org> ---
Created attachment 65212
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65212&action=edit
Proposed fix with python autoconf test and linking fix

Thanks for the python autoconf suggestion.

Here is a revised patch which includes the suggested python autoconf test with
small modifications.   I've also fixed a linking bug.   Next I need to fix the
dependencies.  Boottrapped on freebsd15 and debian x86_64 both with and without
Python3.