llvm dev - May 2018 - Compiling CUDA with clang on Windows

Dear all,

In the official document <https://llvm.org/docs/CompileCudaWithLLVM.html>,
it is mentioned that  CUDA compilation is supported on Windows as of
2017-01-05. I used msys2 to install clang 5.0.1. Then I installed cuda 8.0.
However, I basically could not compile any code of cuda by the prescribed
setting. I wounder if anyone can successfully compile cuda code by the
clang on Windows. Any of your information is highly appreciated, and

best regards
Tsai
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Hi, Tsai.

I've gotten simple clang builds to work with cuda on Windows.  I didn't
use
mingw, though.

Unfortunately your email does not have enough information to allow me to
assist you further than that.

-Justin
On Tue, May 1, 2018 at 7:06 AM Finite Tsai via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Dear all,
> In the official document, it is mentioned that  CUDA compilation is
supported on Windows as of 2017-01-05. I used msys2 to install clang 5.0.1.
Then I installed cuda 8.0. However, I basically could not compile any code
of cuda by the prescribed setting. I wounder if anyone can successfully
compile cuda code by the clang on Windows. Any of your information is
highly appreciated, and
> best regards
> Tsai
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

Dear llvm friends and Justin:

I tried clang 7.0.1 from the pre-built binariy of windows (64bit)
<http://releases.llvm.org/download.html#7.0.1> and cuda 8.0 to build
axpy.cu
in the website <https://llvm.org/docs/CompileCudaWithLLVM.html>. I use the
following command: clang++ axpy.cu -o axpy.exe --cuda-gpu-arch=sm_35
-L"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v8.0\lib\x64"
-lcudart_static. The compiler indicated two types of bugs as "undefined
FP_NAN, FP_INFINITE, FP_ZERO, FP_SUBNORMAL, & FP_NORMAL" and
"conflicts of
isnan, isfinite, & isinf". I patched them by the attached files. Then,
I
can obtain axpy.exe correctly. However, the results are "y[0] = 0, y[1] 0,
y[2] = 0, y[3] = 0", which are not correct. I will be very glad to have
comments from you.

By the way, is it also possible to have a pre-built binary for msys2
(64bits) on windows? I suppose that it should be very similar to a linux
system except reimp should be used to convert the cuda .lib files to the
corresponding .a files. I have used the method to obtain libopencl.a, and
it works perfectly well on my Nvidia GPU + msys2/mingw64/clang5 + opencl
system as I tested all the examples from viennaCL
<http://viennacl.sourceforge.net/>.

best regard
Tsai


On Fri, May 4, 2018 at 6:11 AM Justin Lebar <jlebar at google.com> wrote:
> Hi, Tsai,
>
> Can you try a newer version of clang and CUDA?
>
> -Justin
> On Thu, May 3, 2018 at 1:20 AM Finite Tsai <tsaichiacheng at
gmail.com>
> wrote:
>
>
> > Hi, Justin,
>
> > Attached files are my code and results. Please give me some comments.
> Alternatively, can you tell me how are your simple clang builds to work?
>
> > best regard
> > Tsai
>
>
> > On Wed, May 2, 2018 at 2:30 AM, Justin Lebar <jlebar at
google.com> wrote:
>
> >> Hi, Tsai.
>
> >> I've gotten simple clang builds to work with cuda on Windows. 
I didn't
> use
> >> mingw, though.
>
> >> Unfortunately your email does not have enough information to allow
me to
> >> assist you further than that.
>
> >> -Justin
> >> On Tue, May 1, 2018 at 7:06 AM Finite Tsai via llvm-dev <
> >> llvm-dev at lists.llvm.org> wrote:
>
>
> >> > Dear all,
>
> >> > In the official document, it is mentioned that  CUDA
compilation is
> >> supported on Windows as of 2017-01-05. I used msys2 to install
clang
> 5.0.1.
> >> Then I installed cuda 8.0. However, I basically could not compile
any
> code
> >> of cuda by the prescribed setting. I wounder if anyone can
successfully
> >> compile cuda code by the clang on Windows. Any of your information
is
> >> highly appreciated, and
>
> >> > best regards
> >> > Tsai
>
> >> > _______________________________________________
> >> > LLVM Developers mailing list
> >> > llvm-dev at lists.llvm.org
> >> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
>
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>  I can obtain axpy.exe correctly. However, the results are "y[0] = 0,
y[1] = 0, y[2] = 0, y[3] = 0", which are not correct. I will be very glad
to have comments from you.

It probably is not launching the kernel successfully.  You'll need to add
error checking and then figure out why you're getting an error from CUDA.
> By the way, is it also possible to have a pre-built binary for msys2
(64bits) on windows?

All of these things are community-driven, so if it's not there already, you
may be the best person to provide it.  :)

-Justin

On Wed, Feb 13, 2019 at 4:53 PM Finite Tsai <tsaichiacheng at gmail.com>
wrote:
>
>
> Dear llvm friends and Justin:
>
> I tried clang 7.0.1 from the pre-built binariy of windows (64bit)
> <http://releases.llvm.org/download.html#7.0.1> and cuda 8.0 to build
> axpy.cu in the website
<https://llvm.org/docs/CompileCudaWithLLVM.html>.
> I use the following command: clang++ axpy.cu -o axpy.exe
> --cuda-gpu-arch=sm_35 -L"C:\Program Files\NVIDIA GPU Computing
> Toolkit\CUDA\v8.0\lib\x64" -lcudart_static. The compiler indicated two
> types of bugs as "undefined FP_NAN, FP_INFINITE, FP_ZERO,
FP_SUBNORMAL, &
> FP_NORMAL" and "conflicts of isnan, isfinite, & isinf".
I patched them by
> the attached files. Then, I can obtain axpy.exe correctly. However, the
> results are "y[0] = 0, y[1] = 0, y[2] = 0, y[3] = 0", which are
not
> correct. I will be very glad to have comments from you.
>
> By the way, is it also possible to have a pre-built binary for msys2
> (64bits) on windows? I suppose that it should be very similar to a linux
> system except reimp should be used to convert the cuda .lib files to the
> corresponding .a files. I have used the method to obtain libopencl.a, and
> it works perfectly well on my Nvidia GPU + msys2/mingw64/clang5 + opencl
> system as I tested all the examples from viennaCL
> <http://viennacl.sourceforge.net/>.
>
> best regard
> Tsai
>
>
> On Fri, May 4, 2018 at 6:11 AM Justin Lebar <jlebar at google.com>
wrote:
>
>> Hi, Tsai,
>>
>> Can you try a newer version of clang and CUDA?
>>
>> -Justin
>> On Thu, May 3, 2018 at 1:20 AM Finite Tsai <tsaichiacheng at
gmail.com>
>> wrote:
>>
>>
>> > Hi, Justin,
>>
>> > Attached files are my code and results. Please give me some
comments.
>> Alternatively, can you tell me how are your simple clang builds to
work?
>>
>> > best regard
>> > Tsai
>>
>>
>> > On Wed, May 2, 2018 at 2:30 AM, Justin Lebar <jlebar at
google.com> wrote:
>>
>> >> Hi, Tsai.
>>
>> >> I've gotten simple clang builds to work with cuda on
Windows.  I didn't
>> use
>> >> mingw, though.
>>
>> >> Unfortunately your email does not have enough information to
allow me
>> to
>> >> assist you further than that.
>>
>> >> -Justin
>> >> On Tue, May 1, 2018 at 7:06 AM Finite Tsai via llvm-dev <
>> >> llvm-dev at lists.llvm.org> wrote:
>>
>>
>> >> > Dear all,
>>
>> >> > In the official document, it is mentioned that  CUDA
compilation is
>> >> supported on Windows as of 2017-01-05. I used msys2 to install
clang
>> 5.0.1.
>> >> Then I installed cuda 8.0. However, I basically could not
compile any
>> code
>> >> of cuda by the prescribed setting. I wounder if anyone can
successfully
>> >> compile cuda code by the clang on Windows. Any of your
information is
>> >> highly appreciated, and
>>
>> >> > best regards
>> >> > Tsai
>>
>> >> > _______________________________________________
>> >> > LLVM Developers mailing list
>> >> > llvm-dev at lists.llvm.org
>> >> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
>>
>
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