[Bug libstdc++/67116] incorrect detection of thread model when cross-compiling the tool chain

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67116

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Cezary Śliwa from comment #4)
> OK, the newly built compiler cannot be used because we are cross-compiling.

That's not true, the compiler can be used, but you can't run the executables.

The relevant libstdc++ tests should only need the preprocessor, so should work
with a cross-compiler.

Please attach the libstdc++-v3/config.log file so I can see what commands are
used for the configure tests.