On Sat, Dec 22, 2018 at 7:32 AM David Fetter <da...@fetter.org> wrote: > On Sat, Dec 22, 2018 at 07:03:32AM +1100, Thomas Munro wrote: > > That talks about using -D__ANDROID_API__=23 (or presumably higher) to > > make sure that sigtimedwait is exposed by signal.h. Something similar > > may be afoot here. > > That worked perfectly...to expose the next issue, namely that at least > part of the System-V IPC mechanisms have been left out. Do we support > other systems where this is true?
Interesting, they left that stuff out deliberately out basically because it all sucks: https://android.googlesource.com/platform/ndk/+/4e159d95ebf23b5f72bb707b0cb1518ef96b3d03/docs/system/libc/SYSV-IPC.TXT PostgreSQL currently needs SysV shm just for the small segment that's used for preventing multiple copies running in the same pgdata. You'd need to find a new way to do that. We don't use SysV semaphores (though we can) or message queues. -- Thomas Munro http://www.enterprisedb.com
