However, there are potentially 2 problems with this:

  1. The declaration could conflict with a previous, slightly different
     one.

     Apparently, a given function declaration and the same one decorated
     with GCC function attributes are considered the same, so this
     should be OK.  However, I’m slightly concerned about MSVC’s
     __declspec: does it work if it sees:

       __declspec(dllexport) extern SCM foo (SCM);
       extern SCM foo (SCM);

     If it works, that probably means this point is moot.

  2. The automatically added ‘extern’ declaration makes
     ‘-Wmissing-prototypes’ useless, which is annoying.

Thoughts?

Thanks,
Ludo’.