Library Version 18.1.40

FreeBSD
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## FreeBSD

1. I can't compile and run multithreaded applications.

   Special compile-time flags are required when compiling threaded applications on FreeBSD. If you are compiling a threaded application, you must compile with the _THREAD_SAFE and -pthread flags:

       cc -D_THREAD_SAFE -pthread ...

   The Berkeley DB library will automatically build with the correct options.

2. I see fsync and close system call failures when accessing databases or log files on NFS-mounted filesystems.

   Some FreeBSD releases are known to return ENOLCK from fsync and close calls on NFS-mounted filesystems, even though the call has succeeded. The Berkeley DB code should be modified to ignore ENOLCK errors, or no Berkeley DB files should be placed on NFS-mounted filesystems on these systems.

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