Horak Daniel wrote:
>>What does postgresql do if there is no system-wide union semun?
>>
>
> There is a check for union semun in configure and then if it does not
> find a system wide union semun it defines its own as
>
> #ifndef HAVE_UNION_SEMUN
> union semun
> {
> int val;
> struct semid_ds *buf;
> unsigned short *array;
> };
> #endif
Ah, then cygipc-1.11 won't work for postgresql. Cygwin (and Linux)
implementations of IPC need a fourth union memeber,
struct seminfo *__buf
which is used when cmd == IPC_INFO, SEM_INFO. Linux also requires a
fifth member
void *__pad
while cygipc declares that fifth member because it was modeled on the
Linux code -- but cygipc never accesses __pad.
This sounds like a vote for 'return to 1.10 behavior'. Any other comments?
--Chuck
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