From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/2483 Path: news.gmane.org!not-for-mail From: Rich Felker Newsgroups: gmane.linux.lib.musl.general Subject: Re: spandsp testsuite, feenableexcept() is missing Date: Fri, 14 Dec 2012 14:55:02 -0500 Message-ID: <20121214195502.GN20323@brightrain.aerifal.cx> References: <50CB3804.1020209@ojab.ru> <20121214185810.GL20323@brightrain.aerifal.cx> <50CB82C6.4010209@ojab.ru> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1355514914 5569 80.91.229.3 (14 Dec 2012 19:55:14 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 14 Dec 2012 19:55:14 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-2484-gllmg-musl=m.gmane.org@lists.openwall.com Fri Dec 14 20:55:29 2012 Return-path: Envelope-to: gllmg-musl@plane.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1TjbM0-0004s8-MB for gllmg-musl@plane.gmane.org; Fri, 14 Dec 2012 20:55:28 +0100 Original-Received: (qmail 15665 invoked by uid 550); 14 Dec 2012 19:55:15 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Original-Received: (qmail 15656 invoked from network); 14 Dec 2012 19:55:15 -0000 Content-Disposition: inline In-Reply-To: <50CB82C6.4010209@ojab.ru> User-Agent: Mutt/1.5.21 (2010-09-15) Xref: news.gmane.org gmane.linux.lib.musl.general:2483 Archived-At: On Fri, Dec 14, 2012 at 11:49:26PM +0400, ojab wrote: > On 14.12.2012 22:58, Rich Felker wrote: > >On Fri, Dec 14, 2012 at 06:30:28PM +0400, ojab wrote: > >>>Hi list, > >>> > >>>spandsp testsuite build fails with > >>>> >/root/spandsp/tests/v17_tests.c:311: undefined reference to `feenableexcept' > >>> > >>>AFAIU all functions from fenv.h are not implemented. Is there plans > >>>to implement them before 1.0/at all? > >fenv.h is implemented. The issue is that feenableexcept is not part of > >the standard for fenv.h; it's an extension added by glibc for turning > >on trapping exceptions. This usage is non-portable (as far as I know, > >many machines don't support trapping exceptions) and I've never seen a > >program actually making use of them. It looks like spandsp is just > >using this function in its test suite, probably to test some > >exception-relted behavior. I think this should be fixed upstream, > >since it won't work on other non-GNU systems either. > > > > Ouch, stupid me, I thought that I've checked posix about it. > Sorry for the noise. No problem. It's still useful to have a record that at least some program was trying to use it, even if only for testing purposes; it helps evaluate whether it would ever make sense to add it. However, if you're going to support trapping exceptions, there are a few fenv functions which become slightly more complicated or more expensive, and as long as nothing actually wants trapping exceptions, I think it makes the most sense just to say "they're not supported and we offer no interface to turn them on"; then, the rest of fenv can safely assume they're off. Rich