Does nvcc precompile C++ headers?

Hi all

I am using CUDA and C++ for image processing and need heavy meta programming to optimize
some kernels.
My problem is that nvcc is taking to much time and memory (~5 minutes and 1Go of memory).
Since I often need to recompile the project, I loose a lot of time waiting for nvcc :/.

Plus, the detected errors are sometimes reported after several minutes of compilation :/

gcc and cl provide a way to precompile headers to speed up compilation.
My question: Does nvcc can precompile C++ headers? I did not find anything
about it in the documentation, neither on the web.

Thanks.

Matthieu

nvcc is only a wrapper that emits commands to other programs. It uses gcc to preprocess it’s files (at least on Linux and on the Mac, don’t know about Windows). So even though nvcc does not seem to know about preprocessed headers, you could watch the commands nvcc is using internally by running nvcc -dryrun -keep, and then script them yourself using precompiled headers.

It is also the case on windows. Running nvcc with option --verbose,

I can see that one step is taking ~90% of the compilation time: cudafe.

Unfortunately, the documentation doesn’t explain how to make cudafe

precompile headers. Anyway, I am not sure that header precompilling

will help.

Template instantiation (I think) is the more time consuming task of the

compilation, and I’m afraid that I cannot do anything about that <img src=‘http://forums.nvidia.com/public/style_emoticons/<#EMO_DIR#>/crying.gif’ class=‘bbc_emoticon’ alt=’:’(’ />

Does anybody has been bothered with very very long compile time when

using deep template instantiation? Is there any hack that can make it

faster (other than hand made pre-instantiation :wallbash: ) ?

Has this been improved in the cuda 4 framework?

Have you tried running nvcc with [font=“Courier New”]–no-cpp-cudafe[/font]? Maybe the Microsoft compiler is dealing with large files more efficiently.

Thanks for the tips! However it looks like this option is not supported anymore (CUDA 3.2).

nvcc --no-cpp-cudafe

nvcc fatal : Unknown option ‘-no-cpp-cudafe’

Oops, I thought from your previous comment that you are on Windows, but re-reading it I see that’s not the case. Forget about --no-cpp-cudafe then, as under Linux gcc is already doing the preprocessing anyway.

I guess it would be up to Nvidia engineers then to check why cudafe is so slow. Don’t see much that end-users could do about it (other than trying to minimize preprocessor use).

Thanks for your answers! Sorry for not specifying, I am not on Linux but on Windows :).

Has there been any progress?
Does nvcc now support precompiled header files?
Thank you
Bill
http://www.cs.ucl.ac.uk/staff/W.Langdon/

Looking through the documentation (http://docs.nvidia.com/cuda/cuda-compiler-drivernvcc/index.html), I cannot find anything that suggests support for precompiled header files.

I recommend filing feature requests as “requests for enhancement (RFE)” through the bug reporting form that is linked from the registered developer website. Adding a prefix "RFE: " to the synopsis (subject line) when filing would be helpful.

Dear njuffa,
I have submitted bug report 262591
Thanks for the suggestion
Bill