Make generated .opt files have more consistent format (all comma
separated, excess whitespace eliminated);
(additional_compiler): New routine.
(process_makefile): Use it to handle cc1plus via cp/Make-lang.in.
From-SVN: r9655
When setting up tm.h, convert "vax/vax.h" into "config-vax.h" rather
than "[.config.vax]vax.h" for #include so it will work from [.cp]
subdirectory; copy vax.h to config-vax.h as part of configuration
setup. Also, manually include cc1plus in the list of buildable
compilers (a temporary measure; it should process cp/Makefile.in like
it does for primary makefile).
From-SVN: r7711
Write out the definitions from Makefile.in for
the symbols BC_ALL and BI_OBJ into files BC_ALL.OPT and
BI_ALL.opt. Remove "bytecode " from compiler options files so
compiler will link correctly.
From-SVN: r5552
