Re: Lemon crashing on Solaris? (was Re: [Wireshark-commits] buildbot failure in Wireshark (development) on Solaris-10-SPARC)

[Guy Harris <guy () alum mit edu>]

On Nov 25, 2013, at 1:14 AM, Guy Harris <guy () alum mit edu> wrote:

> I don't know why GCC isn't actually implementing -ftrapv on x86

Well, to be fair, that should be "why llvm-gcc isn't ..." - llvm-gcc may behave differently from regular gcc in a 
number of ways, given that the back end is completely different (some -W checks simply don't work in llvm-gcc; as I 
remember, some of the "not set before use" checks don't actually catch anything with llvm-gcc, although they *do* work 
with clang - perhaps the GCC front end is expecting the back end to do some work that the LLVM back end is expecting 
the front-end to do, but Clang does that work).

As for GCC, there appear to be some bugs about -ftrapv on x86-64, at least:

        http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39771

        http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35412

        http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40143

        http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19020
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