------- Comment #4 from j dot d dot pryce at ntlworld dot com 2007-12-02 16:17 ------- Subject: Re: Directed rounding doesn't work on MacOS X
Dear Pinskia ----------------- I did not realise that GCC does not provide these libraries. Thank you for explaining. On 30 Nov 2007, at 22:20, pinskia at gcc dot gnu dot org wrote: > ------- Comment #3 from pinskia at gcc dot gnu dot org 2007-11-30 > 22:20 ------- > (In reply to comment #2) > ... > Lets put it this way. If fprintf failed, it does not mean it is a > GCC bug as > GCC does not provide the fprintf library function. Yes GCC could > have an ABI > bug but that would mean everything else would be broken but since > just fprintf > is broken, it is most likely a bug in fprintf. Does that mean, for instance, that every C compiler on this particular machine uses the same fprintf function? And it was written by Apple? ----------------- > Well since fesetround is not provided by GCC, it is provided by the > system. > Also are you using Apple's provided GCC, if so please file a bug > with them. We > cannot support their modified version anyways. I got this in a Terminal window > johnpryce 43$which g++ > /usr/bin/g++ > > johnpryce 44$which gcc > /usr/bin/gcc > > johnpryce 45$gcc --version > i686-apple-darwin8-gcc-4.0.1 (GCC) 4.0.1 (Apple Computer, Inc. > build 5367) > Copyright (C) 2005 Free Software Foundation, Inc. > This is free software; see the source for copying conditions. > There is NO > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR > PURPOSE. I see there is a folder /Developer/SDKs/MacOSX10.3.9.sdk/usr/lib/gcc/ but don't know if this is used by the above gcc command, or is something separate. How do I file a bug with Apple? I consulted Apple Help and found a page with these instructions > To submit a bug report to Apple: > Connect to the Internet. > In the dialog that appeared when the application crashed, click the > submit button. ... Which doesn't help, as it's not about crashes. ----------------- >> This violates the IEEE754 standard, which of course mandates >> rounding to >> nearest as the default. > > Of course x87 violates it anyways. > > When I ran the test on a x86 machine, I get:... This stuff about x86 versus x87 was quite new to me. > Please read bug 323. Thanks. I have done so, and read the "floating-point-article.pdf". Very useful. > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34261 > > ------- You are receiving this mail because: ------- > You reported the bug, or are watching the reporter. John Pryce [EMAIL PROTECTED] -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34261
