[CMake] CMake 3.9.x Visual Studio CUDA PDB/compiler flags issues

[Robert Maynard]

As far as gencode goes, your line has errors. With CUDA 8 it should look
like:

-gencode arch=compute_20,code=\"sm_20,compute_20\"



On Mon, Sep 4, 2017 at 4:06 AM, Mueller-Roemer, Johannes Sebastian <
Johannes.Sebastian.Mueller-Roemer at igd.fraunhofer.de> wrote:

> I’m having two issues with debug symbols for CUDA libraries on a project:
>
>
>
> 1.       The PDBs are not placed where the linker later expects to find
> them (haven’t been able to replicate this in a minimal project yet)
>
> 2.       Trying to circumnavigate this issue by using “/Z7” instead of
> “/Zi” does not work, Zi is always used (replicable in any project with CUDA)
>
> Replication steps: Replace -Zi or /Zi in CMAKE_*_FLAGS* (CUDA, CXX, C) by
> -Z7 or /Z7. Build and see several warnings like “cl : Command line warning
> D9025: overriding '/Z7' with '/Zi'” in the output window.
> And do the flags in the –Xcompiler make sense at all in VS? The CUDA build
> tools seem to determine these automatically anyways… for example I get the
> following call in the above scenario:
>
> "C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v8.0\bin\nvcc.exe"
> -gencode=arch=compute_20,code=\"sm_20,compute_20\" --use-local-env
> --cl-version 2015 -ccbin "C:\Program Files (x86)\Microsoft Visual Studio
> 14.0\VC\bin\amd64"  -I"C:\Program Files\NVIDIA GPU Computing
> Toolkit\CUDA\v8.0\include" -I"C:\Program Files\NVIDIA GPU Computing
> Toolkit\CUDA\v8.0\include"  -G   --keep-dir x64\Debug -maxrregcount=0
> --machine 64 --compile -cudart static -Xcompiler="/EHsc -Z7 -Ob0" -g
> -D_WINDOWS -Xcompiler "/EHsc /W3 /nologo /Od /FS /Zi /RTC1 /MDd /GR" -o
> A.dir\Debug\a.cu.obj "D:\jsroemer\projects\cuda-pdb-test\a\a.cu"
>
> 3.       Also, -gencode flags do not behave as expected when given in the
> form -gencode=arch=compute_20,code="sm_20,compute_20", as this causes the
> VS build system to error out:
>
> C:\Program Files (x86)\MSBuild\Microsoft.Cpp\
> v4.0\V140\BuildCustomizations\CUDA 8.0.targets(216,9): error : Item
> '..\..\a\a.cu' Code Generation value is not in the expected format
> '[Arch],[Code]'.
>
> The code generation value in this example is set to
> compute_20,sm_20,compute_20 by CMake.
>
>
>
> Fraunhofer-Institut für Graphische Datenverarbeitung IGD
>
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>
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>
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>
>
>
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