* mpw-config.in: New file, MPW configuration fragment.
* mpw-build.in: New file, MPW build script fragment.
* mpw-make.in: New file, MPW makefile fragment.
(This file is semi-automatically generated from Makefile.in.)
* ldfile.c (slash): If MPW, set to `:'.
* ldlex.l (TRUE_FALSE_ALREADY_DEFINED): If MPW, set this to
prevent redefinition errors.
