[Bug 1865091] [NEW] Backport broken scatter/gather Signatures

[Axel Huebl]

Public bug reported:

Ubuntu 18.04 LTS ships CUDA 9.1.85 which is broken with provided GCC
compilers in a slightly complex way.

By default, the g++ compiler version is 7.4.0, which is not supported by CUDA/NVCC 9.1.85.
Next, CUDA/NVCC 9.1.85 should have provided support for g++ 6. But the release overlooked an incompatibility with std::tuple which renders this compiler combination not useful either:
  https://gist.github.com/ax3l/9489132

Consequently, users that want to use mature C++11/14 features can still switch to install a g++-5 package on Ubuntu 18.04 but this compiler has another set of bugs in signatures of gather/scatter intrinsics which were fixed in later GCC releases. This fix was unfortunately not backported to GCC 5.5 .
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=76731

In order to make NVCC+GCC work together on Ubuntu 18.04, I would recommend to backport the small patches of three intrinsic files with broken signatures to the g++-5 (specifically the libgcc-5-dev) packages:
  https://stackoverflow.com/a/50815334/2719194

Thanks a lot for considering,
Axel

** Affects: gcc-5 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: nvidia-cuda-toolkit (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: nvidia-cuda-toolkit (Ubuntu)
   Importance: Undecided
       Status: New

** Description changed:

  Ubuntu 18.04 LTS ships CUDA 9.1.85 which is broken with provided GCC
  compilers in a slightly complex way.
  
  By default, the g++ compiler version is 7.4.0, which is not supported by CUDA/NVCC 9.1.85.
  Next, CUDA/NVCC 9.1.85 should have provided support for g++ 6. But the release overlooked an incompatibility with std::tuple which renders this compiler combination not useful either:
-   https://gist.github.com/ax3l/9489132
+   https://gist.github.com/ax3l/9489132
  
- Consequently, users that want to use mature C++11/14 features can still switch to install a g++-5 package on Ubuntu 18.04 but this compilers has another set of bugs in gather/scatter intrinsics which were fixed in later GCC releases. This fix was unfortunately not backported to GCC 5.5 .
-   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=76731
+ Consequently, users that want to use mature C++11/14 features can still switch to install a g++-5 package on Ubuntu 18.04 but this compiler has another set of bugs in gather/scatter intrinsics which were fixed in later GCC releases. This fix was unfortunately not backported to GCC 5.5 .
+   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=76731
  
  In order to make NVCC+GCC work together on Ubuntu 18.04, I would recommend to backport the small patches of three intrinsic files with broken signatures to the g++-5 (specifically the libgcc-5-dev) packages:
-   https://stackoverflow.com/a/50815334/2719194
+   https://stackoverflow.com/a/50815334/2719194
  
  Thanks a lot for considering!
  Axel

** Description changed:

  Ubuntu 18.04 LTS ships CUDA 9.1.85 which is broken with provided GCC
  compilers in a slightly complex way.
  
  By default, the g++ compiler version is 7.4.0, which is not supported by CUDA/NVCC 9.1.85.
  Next, CUDA/NVCC 9.1.85 should have provided support for g++ 6. But the release overlooked an incompatibility with std::tuple which renders this compiler combination not useful either:
    https://gist.github.com/ax3l/9489132
  
  Consequently, users that want to use mature C++11/14 features can still switch to install a g++-5 package on Ubuntu 18.04 but this compiler has another set of bugs in gather/scatter intrinsics which were fixed in later GCC releases. This fix was unfortunately not backported to GCC 5.5 .
    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=76731
  
  In order to make NVCC+GCC work together on Ubuntu 18.04, I would recommend to backport the small patches of three intrinsic files with broken signatures to the g++-5 (specifically the libgcc-5-dev) packages:
    https://stackoverflow.com/a/50815334/2719194
  
- Thanks a lot for considering!
+ Thanks a lot for considering,
  Axel

** Description changed:

  Ubuntu 18.04 LTS ships CUDA 9.1.85 which is broken with provided GCC
  compilers in a slightly complex way.
  
  By default, the g++ compiler version is 7.4.0, which is not supported by CUDA/NVCC 9.1.85.
  Next, CUDA/NVCC 9.1.85 should have provided support for g++ 6. But the release overlooked an incompatibility with std::tuple which renders this compiler combination not useful either:
    https://gist.github.com/ax3l/9489132
  
- Consequently, users that want to use mature C++11/14 features can still switch to install a g++-5 package on Ubuntu 18.04 but this compiler has another set of bugs in gather/scatter intrinsics which were fixed in later GCC releases. This fix was unfortunately not backported to GCC 5.5 .
+ Consequently, users that want to use mature C++11/14 features can still switch to install a g++-5 package on Ubuntu 18.04 but this compiler has another set of bugs in signatures of gather/scatter intrinsics which were fixed in later GCC releases. This fix was unfortunately not backported to GCC 5.5 .
    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=76731
  
  In order to make NVCC+GCC work together on Ubuntu 18.04, I would recommend to backport the small patches of three intrinsic files with broken signatures to the g++-5 (specifically the libgcc-5-dev) packages:
    https://stackoverflow.com/a/50815334/2719194
  
  Thanks a lot for considering,
  Axel

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https://bugs.launchpad.net/bugs/1865091

Title:
  Backport broken scatter/gather Signatures

Status in gcc-5 package in Ubuntu:
  New
Status in nvidia-cuda-toolkit package in Ubuntu:
  New

Bug description:
  Ubuntu 18.04 LTS ships CUDA 9.1.85 which is broken with provided GCC
  compilers in a slightly complex way.

  By default, the g++ compiler version is 7.4.0, which is not supported by CUDA/NVCC 9.1.85.
  Next, CUDA/NVCC 9.1.85 should have provided support for g++ 6. But the release overlooked an incompatibility with std::tuple which renders this compiler combination not useful either:
    https://gist.github.com/ax3l/9489132

  Consequently, users that want to use mature C++11/14 features can still switch to install a g++-5 package on Ubuntu 18.04 but this compiler has another set of bugs in signatures of gather/scatter intrinsics which were fixed in later GCC releases. This fix was unfortunately not backported to GCC 5.5 .
    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=76731

  In order to make NVCC+GCC work together on Ubuntu 18.04, I would recommend to backport the small patches of three intrinsic files with broken signatures to the g++-5 (specifically the libgcc-5-dev) packages:
    https://stackoverflow.com/a/50815334/2719194

  Thanks a lot for considering,
  Axel

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