CL_M_LN2          178 3rdparty/include/opencl/1.2/CL/cl_platform.h #define  CL_M_LN2           0.693147180559945286227
CL_M_LN2          269 3rdparty/include/opencl/1.2/CL/cl_platform.h #define  CL_M_LN2           0.693147180559945286227