get error when make test_opencl

[Yu-Zhewen]

OS: ubuntu16.04, GPU: Nvidia

make test_opencl will give me following errors

It is related to the commit 'Imported updates for 2018/2019'.

After I changed back this part of code, every thing is fine. The program can be built and executed.

[XavKearney]

I solved this by deleting the local CL/cl.h which was being used in favour of my installed system version (Ubuntu 18.04).

[jjd06]

Whoops -- moved to OpenCL 1.2 features without updating the bindings. New version of CL/cl.hpp incoming... please try again and let me know if this fixes the issue.

[Yu-Zhewen]

Thank you. The problem is solved.

[Faboor]

Hello,
on DoC lab machines, this isn't sufficient to solve the issue. opencl.h is missing and one of the previous issues (#74) suggests adding -I opencl_sdk/include flag to solve it. However, those file are still not updated.

I have solved this by adding KhronosGroup/OpenCL-Headers as a git submodule and specifying the API version with #define CL_TARGET_OPENCL_VERSION 120 and adding the appropriate -I flag.

It works for me, but might be worth updating the opencl_sdk/include as well.

[jjd06]

Thanks -- I've done the same.

[mantzouj]

To get test_opencl to compile (I kept getting the "underfined reference to ..." errors), I had to copy the OpenCL.lib from the OpenCl folder in my C:\Intel directory to the project directory (opencl_sdk\lib\windows\x86_64). I also didn't need the new files that were committed to opencl_sdk\include. This was all after I installed the Intel SDK for OpenCl
(In addition to adding to the makefile:
LDFLAGS += -Iopencl_sdk/include -Lopencl_sdk/lib/windows/x86_64
LDLIBS += -lOpenCL
)
Using 64-bit windows 10, Intel(R) HD Graphics 620

[szetyng]

Using macOS Mojave v10.14.2, I'm having trouble with making the test_opencl file as well. When I do c++ -I include -W -Wall -std=c++11 -O3 -o bin/test_opencl src/test_opencl.cpp -lOpenCL it says

ld: library not found for -lOpenCL
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [bin/test_opencl] Error 1

Not sure how to solve this.

@szetyng You should swap -lOpenCL with -framework OpenCL on Mac.

You can add -DCL_SILENCE_DEPRECATION as well to ignore all the deprecation warnings.

[jjd06]

These kind of environment-specific headaches are inevitable, and unfortunately I can't give you definitive answers. Things should work properly on Ubuntu and related Linux installs, since that's what I test them on, but for Windows and Mac OS it's a different story....

@mantzouj: You shouldn't have to copy anything. You should be able to change the build scripts to include/link against the relevant directories (wherever they happen to be on your system) when g++ is called.