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Build Marian on Windows with GPU support

Install prerequisites

The following SDK are required to build Marian with GPU support

Patch some files

CUDA: Unsupported Visual Studio Version Error

From nVidia forum

The latest versions of Visual Studio 2017 are not officially supported by CUDA. Two fixes are proposed:

  • Downgrade Visual Studio to a supported version

  • Edit the file <CUDA install path>\include\crt\host_config.h and change the line 131:

    131     #if _MSC_VER < 1600 || _MSC_VER > 1914

    into:

    131     #if _MSC_VER < 1600 || _MSC_VER > 1915

Configure

  • Run configure.bat

Build

  • Run build.bat

Changes from the master branch

This part gives more information on the changes done.

  1. Fix Cuda error : Unsupported Visual Studio Version Error
    See above for justification and fixes

  2. Fix VS compiler flags / Build in Release, with improved debug info
    Github Link
    Added VS specific compile and link flags

  3. Fix Warning: D9002: ignoring unknown option '-m64'
    Github Link
    This one is related to a compiler flag added while finding the package MKL that does not exists for MS compiler.

  4. Fix marian::Backendn marian::cpu::Beckend and marian::gpu::Backend conflicts
    Github Link
    There were name conflicts between the 3 Backend classes that confused the compiler:

    template instantiation resulted in unexpected function type of "type" (the meaning of a name may have changed since the template declaration -- the type of the template is "type") .

    I renamed the CPU and GPU as cpuBackend and gpuBackend.

  5. Fix error : identifier "CUDA_FLT_MAX" is undefined in device code
    Github Link
    CUDA_FLT_MAX is not seen from the device and I had to declare it as __constant__.

    From StackOverflow:

    Undecorated constants get compiled into both host and device code with gcc based toolchains, but not with the Microsoft compiler.

  6. Fix fatal error C1019: unexpected #else
    Github Link
    There was preprocessor instructions (#ifdef ... #else ... #endif) in the middle of a call of a macro function (CUDNN_CALL), which is not allowed with MS compiler.

  7. Fix mismatched class/struct forward declarations
    Microsoft's C++ name mangling makes a distinction between class and struct objects, so definitions and forward declaration must match.
    See this pdf, page 27, for more information.