Date: Wed, 29 Jan 2014 09:23:07 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Dmitry Marakasov <amdmi3@amdmi3.ru> Cc: freebsd-current@FreeBSD.org Subject: Re: libm lacks C99 functions -> no c++11 cmath in libstdc++ Message-ID: <20140129172307.GA88757@troutmask.apl.washington.edu> In-Reply-To: <20140129164136.GA3489@hades.panopticon> References: <20140129164136.GA3489@hades.panopticon>
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On Wed, Jan 29, 2014 at 08:41:36PM +0400, Dmitry Marakasov wrote: > > Gerald haven't responded yet, so I though I'd better post in on the > list as well for wider discussion. > > In short: > - our libm lacks some C99 functions: erfl erfcl lgammal tgammal I have code for erfl and erfcl, and I've done some work on lgammal. See freebsd-numerics list archive. No, I do not have an ETA for when the code may land in the tree. > - bad enough by itself, it affects libstdc++ from ports' gcc in such a > way that it disables C++11 math completely (along with a lot more > other more widely used math functions) > > > - we may probably implement these by calling less-precise > erf erfc lgamma tgamma as we do with other functions as we alredy > do with some others This, unfortuantely, has already been done, although it may only be available in FreeBSD-current. See src/lib/msun/src/imprecise.c. -- Steve
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