Browsing Brazilian Portuguese translation

For these target macros, there is no generic documentation here.  You
should read `Using and Porting GCC' for that.  Only comments specific
to the MMIX target are here.

There are however references to the specific texinfo node (comments
with "Node:"), so there should be little or nothing amiss.  Probably
the opposite, since we don't have to care about old littering and
soon outdated generic comments.
Node: Driver
User symbols are in the same name-space as built-in symbols, but we
don't need the built-in symbols, so remove those and instead apply
stricter operand checking.  Don't warn when expanding insns.
Pass on -mset-program-start=N and -mset-data-start=M to the linker.
Provide default program start 0x100 unless -mno-set-program-start.
Don't do this if linking relocatably, with -r.  For a final link,
produce mmo, unless ELF is requested or when linking relocatably.
Put unused option values here.