[Bug libobjc/64051] broken exception model detection in libobjc's configure

[ossman at cendio dot se]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64051

--- Comment #6 from Pierre Ossman <ossman at cendio dot se> ---
Just to make sure I understand you perfectly. This is not supported:

  ../configure --build=A --host=B --target=B

Instead you have to do:

  ../configure --build=A --host=A --target=B

  Then use that to:

  ../configure --build=A --host=B --target=B

And those two compilers better have the same settings with regard to the target
or you're bound to get problems.

Have I understood it correctly?