The test that often fails is the (extended) gcd one. However, it is unsafe to run MPIR with this gcc unpatched, even if the test code passes, as wrong answers may be returned. It's a long time ago, but as I recall, certain for loops in MPIR compiled incorrectly. This wasn't a preparser problem, so all attempts to replace the code with something alternative that worked, failed. Of course it would also have meant analysing and rewriting whole swathes of MPIR even if we did find a way to work around it.
We didn't add a test for this to MPIR's test suite. But I have no idea why the existing test suite doesn't fail for you. It certainly did on the x86_64 machines I tried. As noted, the problem also affects GMP. Bill. On 9 May 2012 09:14, Jeroen Demeyer <jdeme...@cage.ugent.be> wrote: > On 2012-05-09 10:05, Jason Moxham wrote: >> >> So what's the motivation for refusing to build MPIR with gcc-4.3.2? >> >> The configure script essentially just says "it's broken" without >> specifying how or why. I have built MPIR with gcc-4.3.2 on a GNU/Linux >> x86_64 system with -march=nocona and built gcc with that MPIR and I had >> no problems at all. >> >> >> ------------------------------------------------- >> >> gcc-4.3.2 fails MPIR's make check on x64 , I think it's the reuse test , I >> suppose we should write a proper test so patched gcc's will work , but I'm >> not at all sure what part of gcc is broken as we can't use the reuse test >> itself as it needs MPIR to be built first. Note GMP is also broken on >> gcc-4.3.2 > > Sorry, I should have mentioned that I did run the testsuite with > gcc-4.3.2 and all tests passed. So if there really is a problem with > gcc-4.3.2, the testsuite of MPIR-2.4.0 doesn't catch it. > > -- > You received this message because you are subscribed to the Google Groups > "mpir-devel" group. > To post to this group, send email to mpir-devel@googlegroups.com. > To unsubscribe from this group, send email to > mpir-devel+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/mpir-devel?hl=en. > -- You received this message because you are subscribed to the Google Groups "mpir-devel" group. To post to this group, send email to mpir-devel@googlegroups.com. To unsubscribe from this group, send email to mpir-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/mpir-devel?hl=en.
