RE: amd64

> > - it won't configure-and-build dynamic so early
> >   in the lsbsi-intermediate phase (I don't know
> >   the exact failure)

Ah, I have this answer now.  At this stage of the
build we only have the compiler from the bootstrap.
That's only a C, not a C++ compiler; gettext is
demanding C++.

The test for msgfmt is embedded in autoconf, it
doesn't even appear in the configure.in scripts,
but is generated into the configure scripts,
so it's effectively...everywhere.