eglibc-2.17 build breaks with nptl #include nested too deeply

Has anyone seen this issue before - my builds are failing with the following:

                  from ../ports/sysdeps/arm/sysdeps/../nptl/pthread_spin_lock.c:23,
                  from ../ports/sysdeps/arm/sysdeps/../nptl/pthread_spin_lock.c:23,
                  from ../ports/sysdeps/arm/nptl/pthread_spin_lock.c:23:

../ports/sysdeps/arm/sysdeps/../nptl/pthread_spin_lock.c:23:47: error: #include nested too deeply

Google only returns a recent discussion on the Cygwin list:

http://cygwin.1069669.n5.nabble.com/BUG-Ability-to-access-nonexistent-directories-td98708.html

But, I'm building this on Ubuntu 12.04, not Cygwin. Any pointers, while I keep digging? Thanks.

Denys

Well, a clean build seems to fix it... It's rather unfortunate that periodically incremental builds of the master break like that and can't recover on their own w/o cleaning up the temp directory.

Denys