| [mosquitto-dev] build issue with threads |
I'm helping someone build mosquitto on NetBSD 7 (and yes I know that's old). It's mostly ok, but I am running into pthread weirdness. The symptom is a complain about redefinition of pthread symbols. NetBSD 7 has as far as I know perfectly ok pthreads, but /usr/include/pthread.h does declare some __libc_pthread_foo and define macros from pthread_foo. From cmake cache files, pthreads are detected as ok and use in client programs. But in mosquitto_internal.h #if defined(WITH_THREADING) && !defined(WITH_BROKER) # include <pthread.h> #else # include <dummypthread.h> #endif which seems to try to disable threads within the broker. Somehow, one of the dependencies is including pthread.h (which is now pretty normal). I took out websockets, but I see now that openssl includes it. So I guess in the end: Mosquitto broker wants to not use threads, and to build code that has thread calls with and without actually calling them. The strategy of #defining away thread calls depends on the thread calls not being macros, which I'm pretty sure POSIX doesn't require or there would have lots of complaints in NetBSD-land, and we are generally very serious about standards compliance. I added #undef just before and that resolved the issue. I know NetBSD 7 is EOL but this seems like a bug anyway.
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