Whilst trying to compile ReOpenLDAP (https://github.com/ReOpen/ReOpenLDAP), a fork of OpenLDAP, I'm running into a wall. Some of the code wants a definition of PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP. musl doesn't define this; I suspect this is a non-portable glibc extension in pthread.h. Does any one have any ideas how I might workaround this? Is there an alternative construction that the code could use?