Date: Wed, 29 Jan 2014 13:59:28 -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: <20140129215928.GA89714@troutmask.apl.washington.edu> In-Reply-To: <20140129184735.GA63095@hades.panopticon> References: <20140129164136.GA3489@hades.panopticon> <20140129172307.GA88757@troutmask.apl.washington.edu> <20140129184735.GA63095@hades.panopticon>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Jan 29, 2014 at 10:47:35PM +0400, Dmitry Marakasov wrote: > * Steve Kargl (sgk@troutmask.apl.washington.edu) wrote: > > > > - 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. > > I know, it's available on 10.0 as well. However that's not the case for > 9.x, for which it's impossible to build c++11 math using software (even > if it doesn't use unimplemented functions), neither with system gcc > nor with gcc from ports. > It's not impossible. Add whatever C++-fu you need that is equivalent to #include <math.h> #ifndef fool #define fool(x) foo((double)(x)) #endif -- Steve
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20140129215928.GA89714>