Thanks for your report. We need to hear of OSes which do not provide O_DSYNC and fdatasync() and how to deal with them, so for now MDB demands them unless explicitly disabled.

But the solution will not be a bunch of '#if <OS>'es. Maybe some POSIX feature test macros will be enough, or maybe we can use configure and wrap libmdb/mdb in back-mdb/mdb-wrap.c which makes use of the configure macros.

On Wed, 14 Mar 2012 21:34:37 GMT, 4glitch@gmail.com wrote:

Why ANDROID and __APPLE__ special?

I can't speak for Howard, but:

Got there during development. MDB is still evolving.

The solution will not be a bunch of '#ifdef <OS>'es. Maybe some POSIX feature test macros will be enough, or maybe we can use configure and wrap libmdb/mdb in back-mdb/mdb-wrap.c which makes use of the configure macros.