Date: Sun, 06 Jan 2013 10:29:12 -0500 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Dimitry Andric <dim@FreeBSD.org> Cc: Stefan Farfeleder <stefanf@FreeBSD.org>, freebsd-current@freebsd.org Subject: Re: clang 3.2 RC2 miscompiles libgcc? Message-ID: <50E99848.6090209@freebsd.org> In-Reply-To: <50E9916F.3040500@FreeBSD.org> References: <20121227150724.GA1431@mole.fafoe.narf.at> <50DC65F5.6060004@freebsd.org> <50E0BD66.4070609@FreeBSD.org> <20130102135950.GA1464@mole.fafoe.narf.at> <20130104154940.GD1430@mole.fafoe.narf.at> <20130106141708.GA1418@mole.fafoe.narf.at> <50E9916F.3040500@FreeBSD.org>
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On 01/06/13 09:59, Dimitry Andric wrote: > On 2013-01-06 15:17, Stefan Farfeleder wrote: >> On Fri, Jan 04, 2013 at 04:49:41PM +0100, Stefan Farfeleder wrote: >>> Here's a minimal test case that reproduces the bug: >> [...] >> >> Until someone fixes this bug, could we apply something like this as a >> work-around? >> >> Stefan >> >> Index: gnu/lib/libgcc/Makefile >> =================================================================== >> --- gnu/lib/libgcc/Makefile (revision 245055) >> +++ gnu/lib/libgcc/Makefile (working copy) >> @@ -6,6 +6,8 @@ >> SHLIB_NAME= libgcc_s.so.1 >> SHLIBDIR?= /lib >> >> +CC= gcc >> + >> .include <bsd.own.mk> > > I think this is a bit overkill approach. We still don't know what the > exact cause of the problem is, and this just papers over it. > > Also, ince the bug is only reproducible by compiling the testcase with > g++, could you not compile your crashing programs with clang instead, > for now? :-) > I would very much support this patch. Whatever is going wrong is a critical problem -- although his testcase requires g++, I have lots of code that also crashes when built with clang. The fact that *any* code built with *any* compiler crashes when used with clang-built libgcc is an error. This is quite serious and breaks a *lot* of C++ code. If it can't be fixed now, papering it over is required. -Nathan
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