mingw32 target broken [cygwin as well] [the saga continues]

[DJ Delorie]

> But for a Canadian cross, surely you should have a full build x target
> toolchain - including the linker and target libraries - installed (as well
> as a build x host one) before building the Canadian cross?  (At least,
> etc/configure.texi in src says so.)

There's no guarantee it's the same version as the library you're
building though.  But you're right, we should have a working linker.
It's *executing* the tests that you can't rely on.

And for Cygwin it's even worse, as parts of libiberty.a are used to
build cygwin1.dll, so if you did the linking test you wouldn't build
the very functions cygwin pulls from libiberty to build the dll!