Samba-tng fails to build: "No locking available. Running Samba would be unsafe"

[Paul Kennedy]

Is anyone else having this problem ? I'm trying to build a newly-pulled
(Wednesday 2:30 UTC) samba-tng source tree, and it's failing at the
configure step. I'm running Linux 2.2.12-20smp on a dual-processor HP
Lpr. Running ./configure results in:

...
    checking how to get filesystem space usage
    checking statvfs64 function (SVR4)... no
    checking statvfs function (SVR4)... yes
    checking if large file support can be enabled
    no
    checking configure summary
    ERROR: No locking available. Running Samba would be unsafe
    configure: error: summary failure. Aborting config

And the config.log finishes with:

    #if defined(HAVE_LONGLONG) && (defined(HAVE_OFF64_T) ||
(defined(SIZEOF_OFF_T) && (SIZEOF_OFF_T == 8)))
    #include <sys/types.h>
    #else
    __COMPILE_ERROR_
    #endif

    int main() {
    int i
    ; return 0; }
    configure:11289: gcc -o conftest -O   conftest.c -lreadline  -ldl
-lcrypt 1>&5
    configure: failed program was:
    #line 11285 "configure"
    #include "confdefs.h"
    #include "./tests/summary.c"