Date: Mon, 17 Aug 2009 12:49:52 +0200 From: cpghost <cpghost@cordula.ws> To: Erich Dollansky <erich@apsara.com.sg> Cc: freebsd-questions@freebsd.org Subject: Re: please help to uninstall FreeBSD!!! Message-ID: <20090817104952.GB1162@phenom.cordula.ws> In-Reply-To: <200908171818.47710.erich@apsara.com.sg> References: <980215.56754.qm@web58307.mail.re3.yahoo.com> <20090817102529.be4fe3a5.freebsd@edvax.de> <20090817100906.GA1162@phenom.cordula.ws> <200908171818.47710.erich@apsara.com.sg>
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On Mon, Aug 17, 2009 at 06:18:45PM +0800, Erich Dollansky wrote: > On 17 August 2009 pm 18:09:06 cpghost wrote: > > On Mon, Aug 17, 2009 at 10:25:29AM +0200, Polytropon wrote: > > > By the way, where did I read that #define macro names have to > > > be unique within the first 6 (six) letters? :-) > > > > The 6 letters limit was actually a restriction of earlier > > linkers and it affected all identifiers of linkable objects > > I did not know that linkers resolved macros those days. Of course they didn't. But knowing that linkers restricted the identifiers' length to 6 chars, it made sense for preprocessors to restrict them as well before passing them to the compiler and linker. Actually, it's a bit more complicated than that, but the basic restriction came from the linkers, the preprocessors only inherited it. > Interesting. > > Erich Regards, -cpghost. -- Cordula's Web. http://www.cordula.ws/
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