>> 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().

So?  (*__error()) is a perfectly good lvalue.  (Making sure it works
right may take care in the implementation of __error(), but there's no
reason it couldn't be done.)

					der Mouse

			    mouse@collatz.mcrcim.mcgill.edu