Ok, the problem seems to be with libc_r. switching to libthread_xu works. perl makes this error:
neptune# Fatal error 'mutex is on list' at line ? in file /usr/src/lib/libc_r/uthread/uthread_mutex.c (errno = ?) Fatal error 'mutex is on list' at line ? in file /usr/src/lib/libc_r/uthread/uthread_mutex.c (errno = ?) Fatal error 'mutex is on list' at line ? in file /usr/src/lib/libc_r/uthread/uthread_mutex.c (errno = ?) Fatal error 'mutex is on list' at line ? in file /usr/src/lib/libc_r/uthread/uthread_mutex.c (errno = ?) Fatal error 'mutex is on list' at line ? in file /usr/src/lib/libc_r/uthread/uthread_mutex.c (errno = ?)
