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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.
There is a known bug in the XDR implementation in the FreeBSD C library from version 2.2 up to version 4.0-RELEASE, that causes certain-sized messages to fail and return a zero-filled reply to the client. A bug report (#16028) has been filed with FreeBSD. The following patch is the FreeBSD fix:
*** /usr/src/lib/libc/xdr/xdr_rec.c.orig Mon Jan 10 10:20:42 2000 --- /usr/src/lib/libc/xdr/xdr_rec.c Wed Jan 19 10:53:45 2000 *************** *** 558,564 **** * but we don't have any way to be certain that they aren't * what the client actually intended to send us. */ ! if ((header & (~LAST_FRAG)) == 0) return(FALSE); rstrm->fbtbc = header & (~LAST_FRAG); return (TRUE); --- 558,564 ---- * but we don't have any way to be certain that they aren't * what the client actually intended to send us. */ ! if (header == 0) return(FALSE); rstrm->fbtbc = header & (~LAST_FRAG); return (TRUE);
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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