On Sun, Aug 07, 2011 at 05:41:28PM +0200, Roberto Bagnara wrote:
On 08/07/11 17:33, Jack Howarth wrote:
On Sun, Aug 07, 2011 at 05:23:15PM +0200, Roberto Bagnara wrote:
On 08/07/11 16:56, Jack Howarth wrote:
On Sun, Aug 07, 2011 at 09:31:46AM +0200, Roberto Bagnara wrote:
On 08/06/11 14:14, Jack Howarth wrote:
I am rather baffled that you can't reproduce this problem on Linux.Attached is a build and make check log from x86_64 Fedora 10 using the ppl 0.11.2 release and the binary distribution of the clang 2.9 compilers fromhttp://llvm.org/releases/2.9/clang+llvm-2.9-x86_64-linux.tar.bz2. With CC set to clang and CXX set to clang++, I see the same failures as under the clang compilers from Xcode 4.1 under Lion.
Hi Jack,
please try configuring the PPL with --disable-fpmath on both platforms and let us know if `make check' passes this way.
Building ppl9 with... $ ../configure --prefix=/sw --mandir=/sw/share/man --infodir=/sw/share/info --disable-static --enable-pch --with-java=/System/Library/Frameworks/JavaVM.framework/Home CFLAGS=-g -O2 -pipe -fpch-preprocess -fPIC -fwrapv CXXFLAGS=-g -O2 -pipe -fpch-preprocess -fPIC -fwrapv CPPFLAGS=-I/System/Library/Frameworks/JavaVM.framework/Headers --enable-check=thorough --disable-fpmath -Cproduces no testsuite failures when using clang3.0svn from Xcode 4.1. I'll repeat this with the stock llvm-gcc-4.2 system compilers from Xcode 4.1 as well.
Great, thanks!
Roberto, The results for llvm-gcc-4.2 from Xcode 4.1 weren't as positive. The testcase...
/bin/sh: line 1: 91482 Segmentation fault: 11 ${dir}$tst FAIL: simplifyusingcontext1
segfaults with --disable-fpmath. I wouldn't worry too much about that as Apple is using a much older llvm release for llvm-gcc-4.2 than clang3.0svn in Xcode 4.1. Also, their usual response to llvm-gcc bugs is that it is being depreciated in favor of clang and to use that compiler instead.
Roberto, I tried a build with dragonegg 3.0svn and FSF gcc 4.5.3 using --disable-fpmath. This combination builds ppl 0.11.2 without regressions in the testsuite. So the llvm-gcc-4.2 issue in Xcode 4.1 is likely a bug in their older llvm release used there and can be ignored since clang3.0svn in Xcode 4.1 works fine.
I am pretty confident this is a compiler bug.
Is --disable-fpmath our only option here?
The only other option I see is to debug the compiler bug.
You are talking about the failures seen without --disable-fpmath, correct? Is this really a compiler bug with clang? I thought it was due to the fact that ppl is coded to expect a functional -frounding-math option to be present. This isn't really a compiler bug but a compiler limitation, no? Jack
I guess it will not be an easy task though. Cheers,
Roberto
-- Prof. Roberto Bagnara Applied Formal Methods Laboratory Department of Mathematics, University of Parma, Italy http://www.cs.unipr.it/~bagnara/ mailto:bagnara@cs.unipr.it _______________________________________________ PPL-devel mailing list PPL-devel@cs.unipr.it http://www.cs.unipr.it/mailman/listinfo/ppl-devel