On Thu, Jan 30, 2014 at 02:23:25AM +0400, Dmitry Marakasov wrote: > * Steve Kargl (s...@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 > > The point was that one should not be required to do something like this > to build std::hypot - using software on FreeBSD. >
My point is that specifically adding this #define kludge to whatever software needs it is preferrable to the travesty foisted on libm by msun/src/imprecise.c. What imprecise.c does is not documented. -- steve _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"