Re: Request for portability test of strerror().

Pete Forman writes:
> What I'd like to know is whether any version of strerror() returns
> a non-NULL pointer that does not contain a print of the number.

Bernd Tegg writes:
> QNX 4.25: errno = 0 after strerror(-1) returned "Unknown error"
> (egcs-2.91.66 using watcom 10.6 QNX specific libs)

I'll modify the question then. Does any version of strerror() return
a non-NULL pointer to a garbage string?

The proposed modifications to the PostgreSQL code would be to remove
references to sys_nerr and print both the error number and its text,
if available. Testing against sys_nerr is probably redundant anyway
as most calls to the routines will be with a valid errno. If anyone
feels strongly about keeping sys_nerr it should be tested for by
configure and not with the OS-specific ifdefs in the code.
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