hurd glibc stuff

In file included from /usr/include/pthread/pthread.h:55:0,
                 from /usr/include/pthread.h:2,
                 from ../include/pthread.h:1,
                 from ../libpthread/sysdeps/pthread/libc-lockP.h:22,
                 from ../sysdeps/mach/libc-lock.h:227,
                 from ../include/link.h:46,
                 from ../include/dlfcn.h:4,
                 from ../sysdeps/generic/ldsodefs.h:32,
                 from ../sysdeps/i386/ldsodefs.h:39,
                 from ../sysdeps/gnu/ldsodefs.h:46,
                 from setup-thread.c:22:
/usr/include/pthread/pthreadtypes.h:50:6: error: nested redefinition of 'enum __pthread_contentionscope'
 enum __pthread_contentionscope
      ^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/pthread/pthreadtypes.h:50:6: error: redeclaration of 'enum __pthread_contentionscope'
In file included from ../posix/sys/types.h:270:0,
                 from ../include/sys/types.h:1,
                 from ../include/string.h:4,
                 from ../sysdeps/mach/thread_state.h:47,
                 from ../sysdeps/mach/i386/thread_state.h:49,
                 from setup-thread.c:19:
../libpthread/sysdeps/pthread/bits/pthreadtypes.h:51:6: note: originally defined here
 enum __pthread_contentionscope
      ^~~~~~~~~~~~~~~~~~~~~~~~~