Parallella Community

Hello,

I just want to try and run one of the examples that came with the image installed on my parallela. I am at:

/usr/local/browndeer/examples/hello_opencl/

from the README file it says to compile use:
gcc hello_opencl.c -o hello_opencl.x -I/usr/local/browndeer/include -L/usr/local/browndeer/lib -lcoprthr


I sudo this command but get these results:
linaro-nano:/usr/local/browndeer/examples/hello_opencl> sudo gcc hello_opencl.c -o hello_opencl.x -I/usr/local/browndeer/include -L/usr/local/browndeer/lib -lcoprthr
/tmp/ccewc8h5.o: In function `main':
hello_opencl.c:(.text+0x2a): undefined reference to `clGetPlatformIDs'
hello_opencl.c:(.text+0x54): undefined reference to `clGetPlatformIDs'
hello_opencl.c:(.text+0x9e): undefined reference to `clGetPlatformInfo'
hello_opencl.c:(.text+0x11e): undefined reference to `clGetDeviceIDs'
hello_opencl.c:(.text+0x15a): undefined reference to `clGetDeviceIDs'
hello_opencl.c:(.text+0x1ba): undefined reference to `clCreateContext'
hello_opencl.c:(.text+0x1de): undefined reference to `clCreateCommandQueue'
hello_opencl.c:(.text+0x3ba): undefined reference to `clCreateBuffer'
hello_opencl.c:(.text+0x3e8): undefined reference to `clCreateBuffer'
hello_opencl.c:(.text+0x416): undefined reference to `clCreateBuffer'
hello_opencl.c:(.text+0x468): undefined reference to `clCreateProgramWithSource'
hello_opencl.c:(.text+0x486): undefined reference to `clBuildProgram'
hello_opencl.c:(.text+0x4a0): undefined reference to `clCreateKernel'
hello_opencl.c:(.text+0x4b4): undefined reference to `clSetKernelArg'
hello_opencl.c:(.text+0x4c6): undefined reference to `clSetKernelArg'
hello_opencl.c:(.text+0x4d8): undefined reference to `clSetKernelArg'
hello_opencl.c:(.text+0x4ea): undefined reference to `clSetKernelArg'
hello_opencl.c:(.text+0x52c): undefined reference to `clEnqueueNDRangeKernel'
hello_opencl.c:(.text+0x562): undefined reference to `clEnqueueReadBuffer'
hello_opencl.c:(.text+0x56e): undefined reference to `clWaitForEvents'
hello_opencl.c:(.text+0x5f2): undefined reference to `clReleaseEvent'
hello_opencl.c:(.text+0x5fe): undefined reference to `clReleaseEvent'
hello_opencl.c:(.text+0x608): undefined reference to `clReleaseKernel'
hello_opencl.c:(.text+0x612): undefined reference to `clReleaseProgram'
hello_opencl.c:(.text+0x61e): undefined reference to `clReleaseMemObject'
hello_opencl.c:(.text+0x62a): undefined reference to `clReleaseMemObject'
hello_opencl.c:(.text+0x636): undefined reference to `clReleaseMemObject'
hello_opencl.c:(.text+0x640): undefined reference to `clReleaseCommandQueue'
hello_opencl.c:(.text+0x64a): undefined reference to `clReleaseContext'


Looking at the paths for include path and library path I see these lists of files respectively (include list, then library path):
linaro-nano:/usr/local/browndeer/include> ls
CL/ clsched.h e32pth_if_needham.h
CLETE/ clvector.h e32pth_mem_if_needham.h
clarg.h coprthr/ esdk_missing.h
clcontext.h coprthr.h kcall.h
clelf.h coprthr_arch.h opencl_lift.h
clerror.h coprthr_dev.h opencl_lift_icc.h
clexec.h coprthr_device.h opencl_lift_icc_mic.h
clfcn.h coprthr_mem.h sl_engine.h
clforka.h coprthr_program.h stdcl.h
clinit.h coprthr_sched.h stdcl_host.h
clmalloc.h coprthr_thread.h stdcl_kernel.h
clmalloc_allocator.h coprthr_types.h stdcl_kernel_openclcompat.h
clmulti_array.h coprthr_xdevice.h workp.h
clrpc.h e32_config_needham.h
clrpc_common.h e32_opencl_ext.h

linaro-nano:/usr/local/browndeer/lib> ls
_e32pth_core_main_needham.o libcoprthr_opencl.so
_e32pth_core_needham.ldf libcoprthrcc-e.a
libclelf.a libcoprthrcc-e.so
libclelf.so libcoprthrcc.a
libclrpc.a libcoprthrcc.so
libclrpc.so libe_platform.so
libcoprthr.a libe_platform.so.needham
libcoprthr.so libocl.a
libcoprthr_arch_e32.so libocl.so
libcoprthr_arch_x86_64.a libstdcl.a
libcoprthr_arch_x86_64.so libstdcl.so
libcoprthr_opencl.a


The source code for the c file has include for these:
#include <stdlib.h>
#include <stdio.h>
#include <CL/cl.h>

I don't see the stdlib.h or stdio.h in the include path, but i do see cl.h in the CL under include path:
linaro-nano:/usr/local/browndeer/include/CL> ls
cl.h cl_ext.h cl_gl.h cl_platform.h cl_platform_scalar.h

opening the header cl.h I don't see any reference to the function 'clGetPlatformIDs' or any of the functions that the compiler is complaining about (in bold above), so it makes sense why i'm not compiling. Is there a later install file I need to grab from Github, am I just out of date perhaps? I can't recall where I saw on the parallela forum, but I thought I saw someone mentioning a later image has updated libraries.



If I try to compile with debugger I get:
linaro-nano:/usr/local/browndeer/examples/hello_opencl> sudo gcc hello_opencl.c -o hello_opencl.x -I/usr/local/browndeer/include -L/usr/local/browndeer/lib -lcoprthr_d
/usr/bin/ld: cannot find -lcoprthr_d
collect2: error: ld returned 1 exit status

I don't see any lcoprthr_d at the library path either (there is a lcoprthr.a and lcoprthr.so).


Has anyone had the same problem? Did you resolve? Any help to get my libraries in good shape? Sorry this is so newby, I'm still trying to wrap my head around basic level things. Maybe this should be in stackoverflow for general linux path stuff/gcc compiler issues instead of parallela specific, I wasn't sure if it is just operator error or if I'm missing a latest build for parallella stuff.

Hi JAR,

The download link and the change log link on that page are not working. Both bring up a 404.

nick

Nick,

I would expect them to work soon. I only checked the documentation links earlier.

They docs were just uploaded recently.