PATCH [1/n]: Initial x32 support

[Roland McGrath]

You've got way too much going on here for a single patch.
This needs to be several separate patches.  Use Subject:
lines that say something meaningful about the content of
the change, not just a vague high-level one like this.

An individual change in generic code and the individual change in
configuration-specific code that requires it can go together.

Intimately related changes like a configure.in change adding a new
variable, a config.make.in change substituting, and a makefile change using
it, all belong in one ChangeLog paragraph and in one patch together.

Dimly related changes like several different new variables do not.


Thanks,
Roland