Indeed!
Line 58 causes the error:
https://github.com/viennacl/viennacl-dev/blob/master/viennacl/ocl/platform.hpp
However, these lines are *exactly* the same as in the minimal example;
but the minimal example succeeds. Also, this is the very first call to
OpenCL, so there can't be any prior undetected errors.
What happens if you compile manually? In the main ViennaCL folder:
$> g++ example/tutorial/blas1.cpp -I. -lOpenCL
-L/home/jbelloch/EQU_FILTERING_sandra/opencl/lib/
and then
$> ./a.out
Best regards,
Karli
On 11/19/21 08:37, SANDRA CATALAN PALLARES wrote:
The mistery continues:
jbelloch@odroid:~/EQU_FILTERING_sandra/test_opencl$ ./a.out
# Platforms found: 1
0
Best regards,
Sandra
El vie, 19 nov 2021 a las 8:33, Karl Rupp (<[email protected]
<mailto:[email protected]>>) escribió:
Good morning,
oh - now I'm puzzled. :-/
Can you please add a
std::cout << err << std::endl;
after
std::cout << "# Platforms found: " << num_platforms << std::endl;
Which value do you get? Maybe clGetPlatformIDs returns a nonzero
error code?
Best regards,
Karli
On 11/19/21 08:29, SANDRA CATALAN PALLARES wrote:
> Hi,
>
> The example is working :)
>
> jbelloch@odroid:~/EQU_FILTERING_sandra/test_opencl$ g++ test.cpp
> -lOpenCL -L/home/jbelloch/EQU_FILTERING_sandra/opencl/lib/
> jbelloch@odroid:~/EQU_FILTERING_sandra/test_opencl$ ./a.out
> # Platforms found: 1
>
> Cheers,
> Sandra
>
> El jue, 18 nov 2021 a las 19:48, Karl Rupp
(<[email protected] <mailto:[email protected]>
> <mailto:[email protected] <mailto:[email protected]>>>)
escribió:
>
> thanks! This indicates that there is no OpenCL platform
detected on
> your
> system. Basically this is the simplest query of all.
>
> Can you try to compile and run the following minimal example?
>
>
> #include <iostream>
> #include <string>
> #include <vector>
> #include <cmath>
> #include <stdexcept>
>
> #ifdef __APPLE__
> #include <OpenCL/cl.h>
> #else
> #include <CL/cl.h>
> #endif
>
> int main()
> {
> cl_uint num_platforms;
> cl_platform_id platform_ids[42];
> cl_int err = clGetPlatformIDs(42, platform_ids,
&num_platforms);
> std::cout << "# Platforms found: " << num_platforms <<
std::endl;
>
> return 0;
> }
>
>
>
> $> g++ test.cpp -lOpenCL
> -L/home/jbelloch/EQU_FILTERING_sandra/opencl/lib/
>
> should produce the executable a.out.
>
> It should return at least one platform.
>
> Thanks and best regards,
> Karli
>
>
>
>
>
--
*Sandra Catalán Pallarés*
SecciónDept. Arquitectura de Computadores y Automática
Facultad de Ciencias Físicas - Desp. 223
Universidad Complutense de Madrid
28040 - Madrid (Spain)
(+34) 91 394 *4394 - *[email protected] <mailto:[email protected]>
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