Re: Problems building 3.1.[23] on HP-UX 11.11

[Paul Eggert]

Stepan Kasal <address@hidden> writes:

> Thus I'd like to ask you for another experiment:
> Put the following two lines at the end of custom.h:
> 
> #define _XOPEN_SOURCE 500
> #include <stdarg.h>
> 
> and try to build gawk.

My advice is to avoid futzing with _XOPEN_SOURCE.  I used to futz with
it, but it caused too many problems on too many platforms.  For
example, it breaks <wchar.h> in glibc 2.1.3, due to a glibc bug.

A general problem with feature-test macros like _XOPEN_SOURCE is that
if you use them, you enter into less-tested waters.  It's safer to
avoid them, all other things being equal.