** Description changed: Binary package hint: gcc-4.5 The following code compiles with vanilla GCC: __m128 m, x; float *mem; #if defined(__GNUC__) && __GNUC__ == 4 && (__GNUC_MINOR__ < 5 || (__GNUC_MINOR__ == 5 && __GNUC_PATCHLEVEL__ <= 2)) _mm_maskstore_ps(mem, m, x); #else _mm_maskstore_ps(mem, _mm_castps_si128(m), x); #endif It fails to compile on Ubuntu because the interface of _mm_maskstore_ps was changed to the interface of GCC 4.5.3, but the version number was kept at 4.5.2. Which macro does Ubuntu GCC provide to check for this? For what it's worth, I believe this patch should be reverted in the GCC package, though it's probably too late already. I'd hope the updates to the gcc package would be good enough, though. Or consider to upgrade to 4.5.3 completely. Also, just to add a bit of perspective: I do nightly builds of a software project where GCC snapshots between even patch levels often exhibit miscompilations. I don't see how a distribution could sensibly take any patches from GCC between releases and release that as a given - GCC package. A distribution has the means to ensure that everything - compiles, but that it executes correctly...? + GCC package. A distribution has the means to ensure that its own + packages compile, but that it executes correctly...? In this case you + broke source compatibility without any means to distinguish the + interface version. Since it only affects development for AVX it is no + wonder that you don't notice. That hopefully doesn't imply that you + don't care... ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: gcc 4:4.5.2-1ubuntu3 ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2 Uname: Linux 2.6.38-8-generic x86_64 NonfreeKernelModules: nvidia Architecture: amd64 Date: Tue May 10 16:13:13 2011 InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426.3) ProcEnviron: - LANGUAGE=en_US:en - PATH=(custom, user) - LANG=en_US.UTF-8 - SHELL=/bin/zsh + LANGUAGE=en_US:en + PATH=(custom, user) + LANG=en_US.UTF-8 + SHELL=/bin/zsh SourcePackage: gcc-defaults UpgradeStatus: No upgrade log present (probably fresh install)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/780551 Title: incorrect interface in avxintrin.h -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
