--- [EMAIL PROTECTED] wrote:
> Joe Wilson <[EMAIL PROTECTED]> wrote:
> > --- [EMAIL PROTECTED] wrote:
> > > The comment probably should read: "Needed to enable pthread
> > > recursive mutexes *on Linux*".
> >
> > Or more specifically, on old versions of Linux/GNU LIBC.
> >
> > Have you seen any recent Linux distros that need this macro defined?
> > If so, maybe you could define it only for those specific distros,
> > since defining it can be troublesome on other platforms.
>
> I'm running SuSE 10.1. It isn't that old.
I was wrong. My recent linux distro also requires defining _XOPEN_SOURCE
to 500 to pick up PTHREAD_MUTEX_RECURSIVE -- unless _GNU_SOURCE is defined.
This could be an alternative to avoid defining _XOPEN_SOURCE:
-#if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && SQLITE_THREADSAFE
-# define _XOPEN_SOURCE 500 /* Needed to enable pthread recursive mutexes */
+#if defined(linux) && !defined(_GNU_SOURCE) && \
+ !defined(_XOPEN_SOURCE) && SQLITE_THREADSAFE
+# define _GNU_SOURCE
#endif
Perhaps configure should decide if defining _XOPEN_SOURCE or _GNU_SOURCE
is actually required on a platform.
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