Re: Re: undefined reference to _sys_nerr

Enrique Perez Terron writes:

> If libc does not have sys_errlist, where does strerror() get its data from?

I think the coding in elog.c and exc.c is kind of pointless (other
locations happily use strerror indiscriminately) and obviously not
portable. It should probably be changed.

> Should we rather rely on strerror to check the validity of the argument,
> and output the alternative string only if strerror returns a null pointer
> or a pointer to an empty string?

strerror should always return some error message, even if the argument
isn't valid. That's its whole point, versus using sys_errlist[errno]
(which is probably not portable either).


> Juhan Ernits <Juhan@suhkur.cc.ioc.ee> wrote:
> >Hello!
> >
> >System is NT4 SP6, cygwin 1.1, gcc 2.95.2, PG7RC2.
> >Having fixed the dllmain problem, I got the following one:
> >The step that assembles postgres.exe fails with the following messages:
> >
> >utils/SUBSYS.o(text+0x42de7):elog.c: undefined reference to '_sys_nerr'
> >utils/SUBSYS.o(text+0x437b3):exc.c: undefined reference to '_sys_nerr'
> >collect2: ld returned 1 exit status
> >make[1]: *** [postgres] Error 1
> >...


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Peter Eisentraut                  Sernanders väg 10:115
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