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POerror code (-11):: what are all possible reasons of getting error "cl_build_program_failure" in OpenCL?
 

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  1. POerror code (-11):: what are all possible reasons of getting error "cl_build_program_failure" in OpenCL?
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    <p>I am using ATI RV770 graphics card, OpenCl 1.0 and ati-stream-sdk-v2.3-lnx64 on linux.</p> <p>While running my host code which includes following two sections to build kernel program, i am getting error code (-11) i.e. <code>cl_build_program_failure</code>. Does it means that kernel program compiled, if not then how is it compiled and debugged?</p> <pre><code>const char* KernelPath = "abc_kernel.cl"; //kernel program is in separate file but in same directory of host code.. </code></pre> <p>/<strong><em>*</em></strong> Create Program object from the kernel source <strong><em>*</em>**<em>*</em>**<em>*</em></strong>/ </p> <pre><code>char* sProgramSource = readKernelSource(KernelPath); size_t sourceSize = strlen(sProgramSource) ; program = clCreateProgramWithSource(context, 1,(const char **) &amp;sProgramSource,&amp;sourceSize, &amp;err); checkStatus("error while creating program",err); </code></pre> <p>/<strong><em>*</em></strong> Build (compile &amp; Link ) Program <strong><em>*</em>**<em>*</em>***</strong>/</p> <pre><code>char* options = (char* )malloc(10*sizeof(char)); strcpy(options, "-g"); err = clBuildProgram(program, num_devices, devices_id, options, NULL, NULL); checkStatus("Build Program Failed", err); //This line throwing the error.... </code></pre> <p>function to read kernel program is as follows::</p> <p>/* read program source file*/</p> <pre><code>char* readKernelSource(const char* kernelSourcePath){ FILE *fp = NULL; size_t sourceLength; char *sourceString ; fp = fopen( kernelSourcePath , "r"); if(fp == 0) { printf("failed to open file"); return NULL; } // get the length of the source code fseek(fp, 0, SEEK_END); sourceLength = ftell(fp); rewind(fp); // allocate a buffer for the source code string and read it in sourceString = (char *)malloc( sourceLength + 1); if( fread( sourceString, 1, sourceLength, fp) !=sourceLength ) { printf("\n\t Error : Fail to read file "); return 0; } sourceString[sourceLength+1]='\0'; fclose(fp); return sourceString; </code></pre> <p>}// end of readKernelSource </p> <p>Can anyone tell how to fix it? </p> <p>Does it means that it is OpenCl compilation error at runtime or something else?</p> <p>//Printing build_log info using clGetProgramBuildInfo() as below, But why is is not printing anything?</p> <p>char* build_log; size_t log_size;</p> <pre><code>// First call to know the proper size err = clGetProgramBuildInfo(program, devices_id, CL_PROGRAM_BUILD_LOG, 0, NULL, &amp;log_size); build_log = (char* )malloc((log_size+1)); // Second call to get the log err = clGetProgramBuildInfo(program, devices_id, CL_PROGRAM_BUILD_LOG, log_size, build_log, NULL); build_log[log_size] = '\0'; printf("--- Build log ---\n "); fprintf(stderr, "%s\n", build_log); free(build_log); </code></pre>
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    1. CODid you paste the kernel source into a 3rd party tool of some kind? A profiler maybe? When I get build errors, they are usually syntax within the program itself.
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