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

[Mueller-Roemer, Johannes Sebastian]

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
Fraunhoferstr. 5  |  64283 Darmstadt  |  Germany
Tel +49 6151 155-606  |  Fax +49 6151 155-139
johannes.mueller-roemer at igd.fraunhofer.de<mailto:johannes.mueller-roemer at igd.fraunhofer.de> | www.igd.fraunhofer.de<http://www.igd.fraunhofer.de>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/cmake/attachments/20170904/eda293ea/attachment.html>