On Wed, Sep 18, 2002 at 06:06:56PM +0200, Holger Rauch wrote: > On Wed, 18 Sep 2002, Colin Watson wrote: > > [...] > > #define _XOPEN_SOURCE 500 > > > > ... at the top of your file to access it. See 'info libc "Feature Test > > Macros"'. > > I followed your advice and read the section you mentioned. I found out > that simply specifying -D_GNU_SOURCE in my Makefile solved the problem > ,-).
Yep, _GNU_SOURCE implies _XOPEN_SOURCE 600. You can trawl through /usr/include/features.h for the details. > I also encountered that there seems to be a difference between the > documented _XOPEN_SOURCE option you mentioned and _X_OPEN_SOURCE (not > documented; with an "_" in between the X and the O). One part of my > project needed the version with the "_", the other part the version > without. Strange. What's the difference between the two? Weird. I've never heard of _X_OPEN_SOURCE, and it's not mentioned anywhere in /usr/include here. As far as standard feature test macros go, I would say that the difference is that _XOPEN_SOURCE is right while _X_OPEN_SOURCE is wrong. :-) Perhaps it's a system-specific or project-specific definition, though. Or perhaps _X_OPEN_SOURCE is an older name? I can't find many references to the latter on Google, and the ones I can find don't seem very current. Cheers, -- Colin Watson [[EMAIL PROTECTED]] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
