Help. Porting "FreeOCL" fails (atomic_ops.h missing, CLANG++ libc++ issues ...)

Dimitry Andric dim at
Thu Sep 6 19:19:15 UTC 2012

On 2012-09-06 20:28, O. Hartmann wrote:
> With the patch for Mk/ attached, I can not compile the port
> with CLANG, compilation results in
> [ 15%] Building CXX object src/CMakeFiles/FreeOCL.dir/image.cpp.o
> /usr/ports/devel/freeocl/work/FreeOCL-0.3.6-Source/src/image.cpp:442:27:
> error: member access into incomplete type 'struct _cl_event'
>                                  if (event_wait_list[i]->status < 0)
>                                                        ^
> /usr/local/include/CL/cl.h:46:16: note: forward declaration of '_cl_event'
> typedef struct _cl_event *          cl_event;
>                 ^

Which package installed that /usr/local/include/CL/cl.h file?  It looks
like it should take this header from the source package, not from
whatever is installed into /usr/local.

In the top-level CMakeLists.txt, there is this fragment:


which indicates to CMake it should add -I flags for each of those
directories.  However, it seems -I/usr/local/include is placed earlier
in the arguments of the actual clang++ invocations:

   /usr/bin/clang++ -DFreeOCL_EXPORTS -O2 -pipe -I/usr/local/include
   -fno-strict-aliasing -I/usr/local/include -stdlib=libc++ -std=c++0x
   -DFREEOCL_USE_CXX0X -DFREEOCL_ARCH_amd64 -O3 -ffast-math -fPIC
   -o CMakeFiles/FreeOCL.dir/image.cpp.o -c
So it will take /usr/local/include/CL/cl.h before the cl.h under

Now, as to how we can convince CMake to put the -I/usr/local/include at
the end... Maybe we should just patch the CMakeLists.txt, but that is a
rather ugly solution. :)

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