[Bug bootstrap/53238] Bootstrap failure: error: 'pthread_mutex_timedlock' was not declared in this scope

["redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53238

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-05-09 16:44:07 UTC ---
Hmm, I guess this is for the case where gthr-aix.h includes gthr-single.h,
which doesn't define the C++11 interface.  The configure script determined that
_GLIBCXX_HAS_GTHREADS should be defined, but then that only works if
gthr-posix.h gets included.

A fix (maybe not the right one) would be to add the C++11 types and functions
to gthr-single.h and make it define __GTHREADS_CXX0X, so that <thread> can be
be compiled and the types found, even if the resulting classes can't actually
be used in single-threaded mode.  Another option would be for gthr-aix.h to
#undef _GLBCXX_HAS_GTHREADS in the non-_THREAD_SAFE case, but I think that
would be wrong, changing a property that should be fixed at configure time into
one that depends on switches being used or not when the user compiles code.

I won't be able to work on that until I'm back from holiday in two weeks, in
the meanwhile --disable-libstdcxx-threads should allow you to bootstrap, or
maybe just --disable-libstdcxx-pch