On 27 Feb 2014, at 01:57, Don Lewis <truck...@freebsd.org> wrote: > On 26 Feb, Michael Butler wrote: >> On 02/18/14 12:10, Michael Butler wrote: >>> Is anyone else seeing firefox failing to install after the clang-3.4 >>> merge? As in xpcshell dumping core .. >> >> An update .. >> >> Recompiling with GCC48 on -current yields the same result. Seems to run >> correctly when invoked from the command-line but seg-faults with "errno >> = 4" (invalid instruction) from the build >> >> Giving up and using the Linux port .. :-( > > I've also seen this problem with clang-3.4 on i386. It looks like a > clang bug to me. Clang is putting ud2 instructions in its output which > are guaranteed to fault when it compiles nsAppRunner.cpp. See > <http://www.freebsd.org/cgi/query-pr.cgi?pr=187103>. > > I tried compiling the offending file with gcc46 and didn't see the > problem in the assembly output.
Indeed, this is clang bug with stdcall calling conventions. See the upstream bug http://llvm.org/PR19007 (thanks to Benjamin Kramer for reducing this). I have followed up on the bug with a workaround, which can be used until this bug is fixed upstream, and I can import the fix. -Dimitry
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