[cfe-dev] Compiling simple axpy CUDA

[gry666 via cfe-dev]

Hi Justin,

I've installed master version from git on two systems. Currently I can
thoroughly compile C/C++. But I can't compile CUDA. I think I can't show
headers to clang while I am compiling cuda

The error what I got at the first machine

~/LLVM$ clang++ axpy.cu
In file included from <built-in>:620:
In file included from <command line>:1:
In file included from
/home/Computational/appbin/llvm-git/bin/../lib/clang/3.8.0/include/__clang_cuda_runtime_wrapper.h:47:
In file included from /usr/include/stdlib.h:24:
/usr/include/features.h:374:12: fatal error: 'sys/cdefs.h' file not found
#  include <sys/cdefs.h>
           ^

Second machine
~/workspace/eclipse/TEST/llvm$ clang++ axpy.cu /usr/local/cuda-7.0/include/
-include cuda_runtime_api.h -D__CUDACC__ -m64
In file included from axpy.cu:8:
In file included from /usr/include/cuda_runtime.h:76:
In file included from /usr/include/common_functions.h:167:
/usr/include/math_functions.h:7563:10: fatal error: 'cmath' file not found
#include <cmath>
         ^

Thank you very much


2015-12-20 1:43 GMT+01:00 Justin Lebar <jlebar at google.com>:

> It would be easier to debug this if we both had the same source code.
>
> I'm able to compile many of the samples which came with the CUDA SDK
> *using clang built from head*.  For example:
>
> $NVIDIA_CUDA-7.5_Samples/0_Simple/matrixMul$
> ~/code/llvm/release/bin/clang++ -o matrixMulClang -I../../common/inc
> -L/usr/local/cuda-7.5/lib64 -I/usr/local/cuda-7.5/ matrixMul.cu
> -lcudart_static -lcuda -ldl -lrt -pthread
>
> Does this work for you?  If not, what platform are you on?
>
> Note that the CUDA implementation in Clang is by no means complete.
> It mostly works, but there are lots of edge-cases (e.g. printf) that
> we're still working on.
>
> -Justin
>
> On Mon, Dec 14, 2015 at 9:57 AM, gry666 via cfe-dev
> <cfe-dev at lists.llvm.org> wrote:
> > Hi all,
> >
> > It's my first trial with clang. so if my question is so simple, i'm sorry
> > first of all.
> >
> > Basically, I'm trying to compile simple axpy cuda code by using clang,
> I'm
> > following this example http://llvm.org/docs/CompileCudaWithLLVM.html.
> > However I'm getting this errors
> >
> > $ clang++ axpy.cu -o axpy-clang -I/usr/local/cuda/samples/common/inc
> > In file included from axpy.cu:1:
> > In file included from
> /usr/local/cuda/samples/common/inc/helper_cuda.h:24:
> > /usr/local/cuda/samples/common/inc/helper_string.h:18:10: fatal error:
> > 'fstream' file not found
> > #include <fstream>
> >          ^
> > 1 error generated.
> > axpy.cu:5:1: error: unknown type name '__global__'
> > __global__ void axpy(float a, float* x, float* y) {
> > ^
> > axpy.cu:5:12: error: expected unqualified-id
> > __global__ void axpy(float a, float* x, float* y) {
> >            ^
> > axpy.cu:19:19: error: use of undeclared identifier 'cudaMalloc'
> >   checkCudaErrors(cudaMalloc(&device_x, kDataLen * sizeof(float)));
> >                   ^
> > axpy.cu:20:19: error: use of undeclared identifier 'cudaMalloc'
> >   checkCudaErrors(cudaMalloc(&device_y, kDataLen * sizeof(float)));
> >                   ^
> > axpy.cu:22:30: error: use of undeclared identifier
> 'cudaMemcpyHostToDevice'
> >                              cudaMemcpyHostToDevice));
> >                              ^
> > axpy.cu:25:3: error: use of undeclared identifier 'axpy'
> >   axpy<<<1, kDataLen>>>(a, device_x, device_y);
> >   ^
> > axpy.cu:28:19: error: use of undeclared identifier
> 'cudaDeviceSynchronize'
> >   checkCudaErrors(cudaDeviceSynchronize());
> >                   ^
> > axpy.cu:30:30: error: use of undeclared identifier
> 'cudaMemcpyDeviceToHost'
> >                              cudaMemcpyDeviceToHost));
> >                              ^
> > axpy.cu:37:19: error: use of undeclared identifier 'cudaDeviceReset'
> >   checkCudaErrors(cudaDeviceReset());
> >                   ^
> > 9 errors generated.
> >
> > What am I supposed to do?
> >
> > Regards
> > --
> > sulomen
> >
> > _______________________________________________
> > cfe-dev mailing list
> > cfe-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
> >
>



-- 
Güray Özen
DEU Computer Engineering Department
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