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From: Mark H Weaver <mhw@netris.org>
To: taylanbayirli@gmail.com (Taylan Ulrich "Bayırlı/Kammer")
Cc: guile-devel@gnu.org
Subject: Re: 2.0.11 on OS X 10.9 / Xcode 5.1
Date: Thu, 10 Apr 2014 21:08:58 -0400	[thread overview]
Message-ID: <87zjjsfz9x.fsf@yeeloong.lan> (raw)
In-Reply-To: <87bnwak01s.fsf@taylan.uni.cx> ("Taylan Ulrich \=\?utf-8\?Q\?\=5C\=22Bay\=C4\=B1rl\=C4\=B1\=2FKammer\=5C\=22\=22's\?\= message of "Wed, 09 Apr 2014 17:14:07 +0200")

taylanbayirli@gmail.com (Taylan Ulrich "Bayırlı/Kammer") writes:

> By the way, after installing GCC 4.8 from MacPorts and setting the CC
> environment variable to use it (executable "gcc-mp-4.8"), the above
> issues are resolved, but I get the following test failure now:
>
> Running numbers.test
> ;;; ("#i1@-0" 1.0 -0.0)
> FAIL: numbers.test: string->number: valid complex number strings
>
> The issue seems to be that (imag-part #i1@-0) => 0.0 instead of -0.0

What does (sin -0.0) evaluate to?

My first guess is that at the C level, sin(-0.0) => 0.0 on your system,
although IEEE 754 and C11 (F.10.1.6) specify that sin(-0.0) => -0.0.

If my guess is incorrect, then please put a breakpoint in
'scm_c_make_polar' and see what's going wrong.  Both 'ang' and 's'
should be -0.0, and then it should pass -0.0 as the second argument to
'scm_c_make_rectangular'.

    Thanks,
      Mark



  parent reply	other threads:[~2014-04-11  1:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-03 19:35 2.0.11 on OS X 10.9 / Xcode 5.1 Taylan Ulrich Bayırlı/Kammer
2014-04-09 15:14 ` Taylan Ulrich Bayırlı/Kammer
2014-04-09 15:38   ` Taylan Ulrich Bayırlı/Kammer
2014-04-10 14:10   ` Greg Troxel
2014-04-11  1:08   ` Mark H Weaver [this message]
2014-04-22 14:36     ` Taylan Ulrich Bayirli/Kammer
2014-04-22 16:28       ` Mark H Weaver
2014-04-23 17:51         ` Taylan Ulrich Bayirli/Kammer
2014-04-24 14:20           ` Taylan Ulrich Bayirli/Kammer
2014-04-24 16:04           ` Mark H Weaver

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