> 
> John Birrel writes:
> >We're living with a threaded version of NetBSD's libc where errno is thread
> >specific. By changing errno.h to define errno as:
> 
> >extern  int *__error();
> >#define errno (*__error())
> 
> I believe POSIX requires errno to be writeable in order to detect the
> indeterminate cases of sysconf()/pathconf().

The non-threaded version of __error() just returns &errno, whereas the
threaded version returns &pthread_run->error. In either case these _must_ be
writeable for errno to work (because the cerror asm code calls __errno() to
change the value of errno).

> -- 
> Christoph Badura	bad@flatlin.ka.sub.org		+49 721 606137
> 
> Es genuegt nicht, keine Gedanken zu haben;
> man muss auch unfaehig sein, sie auszudruecken.  - Karl Kraus
> 

In my original post on this subject (thread? 8-), I referred to stdio.h. I
should have referred to signal.h (which has 'extern int errno' in macros).

-- 
John Birrell                                CIMlogic Pty Ltd
jb@cimlogic.com.au                          119 Cecil Street
Ph  +61  3 9690 9600                        South Melbourne Vic 3205
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