Public bug reported:
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...?
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
SourcePackage: gcc-defaults
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gcc-4.5 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug natty
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https://bugs.launchpad.net/bugs/780551
Title:
incorrect interface in avxintrin.h
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