Compilation problems on Digital OSF1 4.0

Dear PostgreSQLers,

I try to build the new PostgreSQL v6.4 on our Alpha workstations running
OSF/1 4.0 with egcs-2.91.57 19980901 (egcs-1.1 release). The INSTALL
file says there are "minor patchable problems". However, I'm not sure
how to patch this one:

The sources seem to assume that slock_t can be typecast to int. But
OTOH, src/include/os.h says

#include <sys/mman.h> /* for msemaphore */
typedef msemaphore slock_t;

and our /usr/include/sys/mman.h has:

typedef struct {
int msem_state; /* The semaphore is locked is non-zero. */
int msem_wanted; /* Threads are waiting on the semaphore. */
}msemaphore;

Now, I patched the "offending" line in src/include/os.h to:

typedef int slock_t;

As a result, I have now managed to get everything through the compiler
(after some other patches which were indeed minor). However, my technical
knowledge about semaphores, test-and-set etc. is limited and at the same
time, it seems to me that fumbling in this area can be disastrous in a
database system, I would appreciate if some knowledgeable person could
comment on this.

Greetinx & thanx in advance, Jan
--
+- Jan T. Kim -------------------------------------------------------+
| email: kim(at)mpiz-koeln(dot)mpg(dot)de |
| WWW: http://www.mpiz-koeln.mpg.de/~kim/ |
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