It is true for any library interface that relies on passing errno,
since that is what _REENTRANT changes. I'm not sure about the exact
mechanics -- it may only fail if the library is reentered.
....Roy
On Thu, Aug 30, 2001 at 09:46:53AM -0600, Charles Randall wrote:
> Is that always true? For example, expat is not compiled with those flags.
>
> -----Original Message-----
> From: Roy T. Fielding [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, August 29, 2001 7:08 PM
> To: [EMAIL PROTECTED]
> Subject: Re: 2.0.25 on FreeBSD 4.2-R -- 404 returns text/plain error
> page
>
>
> > As a side note, some portions of the code are compiled with "-D_REENTRANT
> > -D_THREAD_SAFE" even when building using the prefork mpm. Why? Doesn't
> that
> > have the potential to do the wrong thing on some platforms?
>
> No, it would do the wrong thing if they were not defined. They are required
> for the entire executable if any part of the exec has been compiled with
> those flags. In our case, since modules like PHP and others will be
> compiled with those flags, we must always compile with those flags or
> mod_php's return values for errno won't be correctly interpreted by
> the httpd core (a problem that was fixed in some version of 1.3.x by
> always setting those flags on platforms that support it).
>
> ....Roy
