Building issues fixed on Mac with SDK 10.10 and Xcode 6.2

[kayjkay]

I was unable to compile on Mac with SDK 10.10 and Xcode 6.2. However, the following are the simple fixes.

Copy cl.hpp:

https://www.khronos.org/registry/cl/api/1.2/cl.hpp

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/OpenCL.framework/Versions/A/Headers

Fix CLUtils.hpp by adding #include < numeric > (std::accumulate needs it)

include < numeric >

to have this compile:
rep total (rep initVal = 0.0)
{
return std::accumulate (tExec.begin (), tExec.end (), initVal);
}

Fix CLUtils.cpp by adding (APPLE)

if defined(_WIN32)

include <windows.h>

elif defined(linux)

include <GL/glx.h>

elif APPLE

include <OpenGL/OpenGL.h>

endif

[nlamprian]

Hey kayjkay,

Could you give me a little bit more information since I'm unfamiliar with OSX?

1. Why do you need to copy cl.hpp? Is it not present on your system? Is the FindOpenCL module unable to find it?
2. What do you need to include here:

#elif defined(__APPLE__)
#include <???>
#endif

[kayjkay]

Hi Nick,

Thank you for making the ICP source available.

The External Repository cmake did not work that I had to manually build
each of the dependencies. That's why I ended up building CLUtils.

To answer your questions:

1. There wasn't cl.hpp is not present on the system. Installing XCode (IDE)
   installs the OSX SDK which includes OpenCL and OpenGL framework. Framework
   is a directory structure. Within it, there is cl.h but not cl.hpp. I did
   not do a diff of the two files to see if they were the same.
2. It's #include <OpenGL/OpenGL.h>. The CglCreateContext symbol was not
   defined otherwise on Mac.

I hope to get your ICP source and the OpenGL example built on OSX. If I
bump in to an issue, I will let you know.

Thanks again.

Kay

On Thu, Jun 18, 2015 at 4:20 PM, Nick Lamprianidis <notifications@github.com

wrote:

Hey kayjkay,

Could you give me a little bit more information since I'm unfamiliar with
OSX?

1. Why do you need to copy cl.hpp? Is it not present on your system?
   Is the FindOpenCL module unable to find it?
2. What do you need to include here:

#elif defined(APPLE)
#include <???>
#endif

—
Reply to this email directly or view it on GitHub
#1 (comment).

[nlamprian]

Thank you Kay for the fixes.
I've already made a commit adding those includes.
On the cl.hpp matter, I'll wait until I get a more complete picture of the situation.
And yes, please let me know if anything else comes up.

[drhalftone]

Dear Guys;

I think I'm running into the same problem; however, I don't know how to fix it. Kayjkay, if you have had success, can you tell me how to get everything to compile? Here is what I'm getting when I try to compile CLutils by itself:

DrHalftone:build dllau$ cmake ..
-- - Includes: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/OPENCL.framework
-- gtest not found:
-- - Library will be downloaded from source
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/dllau/SourceTree/CLUtils/build
DrHalftone:build dllau$ make
[ 7%] Building CXX object src/CMakeFiles/CLUtils.dir/CLUtils.cpp.o
In file included from /Users/dllau/SourceTree/CLUtils/src/CLUtils.cpp:37:
/Users/dllau/SourceTree/CLUtils/include/CLUtils.hpp:48:10: fatal error: 'OpenCL/cl.hpp' file not found
#include <OpenCL/cl.hpp>
^
1 error generated.
make[2]: *** [src/CMakeFiles/CLUtils.dir/CLUtils.cpp.o] Error 1
make[1]: *** [src/CMakeFiles/CLUtils.dir/all] Error 2
make: *** [all] Error 2
DrHalftone:build dllau$

[drhalftone]

Ok, I found a reference to the same compiling problem but a different project. I now better understand kayjkay's solution. What I read was that Mac OS X 10.10 SDK doesn't include the C++ OpenCL headers (the ones that end in .hpp). So that's why we have to download them from Kronos. I thought that by following kayjkay's solution, I was duplicating the headers and that CMake just wasn't finding them. I see that was wrong. So now I can compile the CLUtils project.