[Module-build-general] The 'inc' parameter

[Ken W. <ke...@ma...>]

Hi Dave,

In the patch that lent support to the INC parameter for pass-through 
Makefile.PLs, we added an 'inc' parameter to M::B.  I'm not sure that's 
a great idea, because it seems like too brief a name for a somewhat 
obscure parameter (obscure only because most modules don't need to add 
C libraries to the include path anymore in this perl-centric world).

I think we either need to think of a name for it or fold it into the 
new 'extra_compiler_flags' parameter by doing map( "-I$_", @foo ) to it.

We can still map INC=... makefile stuff to it properly in the Compat 
code.

  -Ken