opencl build error..!!

I face to opencl program build error.
I read the document of opencl 1.0.43 provide by KHRONOS.

“CL_BUILD_PROGRAM_FAILURE if there is a failure to build the program executable.
This error will be returned if clBuildProgram does not return until the build has

But I don’t know why this error is occured. Before I builded to command window, it isn’t occured any error.
I builded to mfc, however, it is occured cl_build_program_failure error.

Is my soruce code wrong or miss anything??

Are you sure your openCL kernel it’s OK? Try commenting the code of the kernel and seeing if compile. If it happens, there is a kernel code error, with CL_PROGRAM_BUILD_STATUS flag in clGetProgramBuildInfo you can check where is the problem.

I attempt “clGetProgramBuildInfo()” before, and I got this information.
:160: error: expected identifier or ‘(’

It seems that you have an kernel code error, i suggest you that read de code in the line that appear in the error and look for an error in the neighborhood.

When I build the same opencl kernel source in command(with c), it never occured error.
But now, I build with mfc, it is occured error. (opencl kernel source is same!!)
Therefore I don’t understand in this situation… :?:

Do you have multiples kernels on the opencl kernel file? If that, try to make a file with only one kernel.

No I don’t have multiples kernels on the opencl kernel file…
It has only one kernel.

I want to complie opencl from mfc project. Is it a problem??

sorry, mfc? what is that?

MFC is Microsoft Foundation Class Library in windows.

The Microsoft Foundation Class Library (also Microsoft Foundation Classes or MFC) is a library that wraps portions of the Windows API in C++ classes, including functionality that enables them to use a default application framework.
Classes are defined for many of the handle-managed Windows objects and also for predefined windows and common controls.

I suggest doing as santtt says and looking around line 160 to see what is wrong with the kernel source that is producing error: expected identifier or ‘(’

Maybe the kernel code is not exactly what you think and that’s why it’s producing an error now. MFC should have nothing to do with the error you are seeing.

I got an error like yours and the answer was casting types. Cast everything you see and compile again!

Hi, even I am facing the same problem which is being discussed. So in order to debug i removed all other lines of the code except two. But still i am getting the same errors.

:16: error: expected identifier or ‘(’

I am using Visual Studio and the kernel code is as follows:

__kernel void hypothesis_opencl(__global uchar *Edges,
				  __global uchar *Depth,									
				  __global uchar *Filtered,
				  __global float *weights_table,
				  __global float *dist_table,
				  int height,
				  int width,
				  int fltr_radius,
				  float search_limit)
	int x = (int)get_global_id(0);

	Filtered[x] = Depth[x];


the host code

#include "yuv_reader.h"
#include "hypothesis_opencl.h"
#include "pugixml.hpp"
#include "config.h"

// Main function
// *********************************************************************
int main(int argc, char **argv)

	// Get platforms
	cl_uint nPlatform = 0;
	clGetPlatformIDs(0, NULL, &nPlatform);
	cl_platform_id* plInfos = (cl_platform_id*)malloc(nPlatform * sizeof(cl_platform_id));
	clGetPlatformIDs(nPlatform, plInfos, NULL);

	// Get device
	cl_context GPUContext;
	for (cl_uint i = 0; i < nPlatform; i++)
		cl_uint nDev = 0;
		clGetDeviceIDs(plInfos[i], CL_DEVICE_TYPE_GPU, 0, 0, &nDev);
		cl_device_id* GPUDevices = (cl_device_id*)malloc(nDev * sizeof(cl_device_id));
		clGetDeviceIDs(plInfos[i], CL_DEVICE_TYPE_GPU, nDev, GPUDevices, 0);
		// Create a context to run OpenCL on our CUDA-enabled NVIDIA GPU
		cl_int errNum;
		GPUContext = clCreateContext(NULL, nDev, GPUDevices, 0, 0, &errNum);
		if(errNum != CL_SUCCESS)
			std::cout << "ERROR: OpenCL::clCreateContext" << std::endl;
			return -1;

	// Get the list of GPU devices associated with this context
	size_t ParmDataBytes;
	clGetContextInfo(GPUContext, CL_CONTEXT_DEVICES, 0, NULL, &ParmDataBytes);
	cl_device_id* GPUDevices = (cl_device_id*)malloc(ParmDataBytes);

	clGetContextInfo(GPUContext, CL_CONTEXT_DEVICES, ParmDataBytes, GPUDevices, NULL);

	// Create a command-queue on the first GPU device
	cl_command_queue GPUCommandQueue = clCreateCommandQueue(GPUContext,	GPUDevices[0], 0, NULL);

	// Read OpenCL code from file
	size_t sourceLength = 0;
	char* sourceCL = readTextFile((char*)filenameCL.c_str(), &sourceLength);

	if(sourceCL == NULL || sourceLength<10)
		std::cout << "ERROR::main::readTextFile: Cannot open " << filenameCL << " file" << std::endl;
		return -2;

	cl_int errNum;

	// Create OpenCL program with source code
	cl_program OpenCLProgram = clCreateProgramWithSource( GPUContext, 
														  (const char **)&sourceCL, 
		delete[] sourceCL;
	if(errNum != CL_SUCCESS)
		std::cout << "ERROR::main::clCreateProgramWithSource: Unable to create opencl program" << std::endl;
		return -1;

	// Build the program (OpenCL JIT compilation)
	retVal = clBuildProgram(OpenCLProgram, 1, GPUDevices, NULL, NULL, NULL);
	//if(retVal != CL_SUCCESS)
	//	std::cout << "ERROR::main::clBuildProgram: " << retVal << std::endl;
	//	return -1;

	size_t paramValueSize = 1024 * 1024,
	char *paramValue;
	paramValue = (char*)calloc(paramValueSize, sizeof(char));
	retVal = clGetProgramBuildInfo( OpenCLProgram,

	fprintf(errLog, paramValue);

	// Create a handle to the compiled OpenCL function (Kernel)
	cl_kernel openCLKernel = clCreateKernel( OpenCLProgram,
	//if(errNum != CL_SUCCESS)
	//	std::cout << "ERROR::main::clCreateKernel: " << errNum << std::endl;
	//	return -1;

	// Set kernel arguments
	LocalBuffer buffLoc;
	GPUBuffer buffGPU;
	initLocalBuffer(&buffLoc, w, h);
	initGPUBuffer(&buffGPU, GPUContext, w, h, searchLimit, radius);

	// Fill local buffer with appropriate values
	// pre-calculation of color & distance weights
	init_color_SAD(buffLoc.weightTable, sigmaColor, MAXDIFF);    
	init_distance(buffLoc.distTable, sigmaDistance, radius);

	// Loop till the end of video file
	while((CIYuv_depth.readOneFrame(pf_read_depth, frameno)) == true)
		CIYuv_col.readOneFrame(pf_read_col, frameno);

		std::cout << "Processing frmne no. " << frameno << "

		// Set the YUV image format to 444

		int i = 0,
			j = h * w,
			k = h * w * 2;

		// Initialize with some interesting data
		// Copy Y U V data to the local buffer
		for(int r = 0; r < h; r++)
			for(int c = 0; c < w; c++)
				buffLoc.frameCol[i] = CIYuv_col444.Y[r][c];
				buffLoc.frameCol[j++] = CIYuv_col444.U[r][c];
				buffLoc.frameCol[k++] = CIYuv_col444.V[r][c];

				buffLoc.frameDepth[i++] = CIYuv_depth.Y[r][c];

		// Copy the output in CPU memory TO GPU memory 
		//clEnqueueWriteBuffer(GPUCommandQueue, GPUVector1, CL_TRUE, 0,
		//sizeof(int) * CIYuv_col.getSizeInByte(), HostVector1, 0, NULL, NULL);

		// Copy the output in CPU memory TO GPU memory 
		fillGPUBuffer( GPUCommandQueue, 
					   &buffLoc );

		initKernel( openCLKernel,

		// Launch the Kernel on the GPU
		size_t workSize[2] = {w, h}; // two dimensional Range

		clEnqueueNDRangeKernel(	GPUCommandQueue,

		// Copy the output in GPU memory back to CPU memory
		clEnqueueReadBuffer( GPUCommandQueue,
							 sizeof(uchar) * (w * h), 


		// Increment the frame index
  		frameno ++;


	return 0;

Can someone suggest me some solution to debug this error.

I looks like the string you are passing to the OpenCL compiler contains more than the actual file content. I suggest you carefully read the ‘readTextFile’ function and ensure that the value written to ‘sourceLength’ is correct. If you are on Windows, then pay particular attention to newline characters.

Thanks friend, you were correct.

To solve the error “CL_Build_program_Failure” is because the build file is not loaded properly or the systems file is missing .For this you have go through the newer version of the document 1.0.44 provided by the KHRONOS.

There is definetly a problem with the configuration files.Once that is set up.The program will restart and them will b running fine.Try rebuilding the mfc ,if that doesn’t work either ,there is a problem with the source code.