ret = clBuildProgram(program, 1, &device_id, NULL, NULL, NULL);

	//if (ret != CL_SUCCESS) { // odkomentuj a mas vypis jen kdyz to tam vyfailuje, jinak to vypisuje vse printf("KOKOT");
	char *buff_erro;
	cl_int errcode;
	size_t build_log_len;
	errcode = clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_LOG, 0, NULL, &build_log_len);
	if (errcode) {
		printf("clGetProgramBuildInfo failed at line %d\n", __LINE__);
		exit(-1);
	}

	buff_erro = (char*)malloc(build_log_len);
	if (!buff_erro) {
		printf("malloc failed at line %d\n", __LINE__);
		exit(-2);
	}

	errcode = clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_LOG, build_log_len, buff_erro, NULL);
	if (errcode) {
		printf("clGetProgramBuildInfo failed at line %d\n", __LINE__);
		exit(-3);
	}

	fprintf(stderr, "Build log: \n%s\n", buff_erro); //Be careful with  the fprint
	free(buff_erro);
	fprintf(stderr, "clBuildProgram failed\n");
	//}