[opencl_init] opencl related configuration options:
[opencl_init] 
[opencl_init] opencl: 1
[opencl_init] opencl_library: ''
[opencl_init] opencl_memory_requirement: 768
[opencl_init] opencl_memory_headroom: 300
[opencl_init] opencl_device_priority: '*/!0,*/*/*'
[opencl_init] opencl_mandatory_timeout: 200
[opencl_init] opencl_size_roundup: 16
[opencl_init] opencl_async_pixelpipe: 0
[opencl_init] opencl_synch_cache: 0
[opencl_init] opencl_number_event_handles: 25
[opencl_init] opencl_micro_nap: 1000
[opencl_init] opencl_use_pinned_memory: 0
[opencl_init] opencl_use_cpu_devices: 0
[opencl_init] opencl_avoid_atomics: 0
[opencl_init] 
[opencl_init] found opencl runtime library 'OpenCL.dll'
[opencl_init] opencl library 'OpenCL.dll' found on your system and loaded
[opencl_init] found 1 platform
[opencl_init] found 2 devices
[opencl_init] device 0 `Intel(R) HD Graphics 4000' supports image sizes of 16384 x 16384
[opencl_init] device 0 `Intel(R) HD Graphics 4000' allows GPU memory allocations of up to 324MB
[opencl_init] device 0: Intel(R) HD Graphics 4000 
     GLOBAL_MEM_SIZE:          1298MB
     MAX_WORK_GROUP_SIZE:      512
     MAX_WORK_ITEM_DIMENSIONS: 3
     MAX_WORK_ITEM_SIZES:      [ 512 512 512 ]
     DRIVER_VERSION:           10.18.10.3993
     DEVICE_VERSION:           OpenCL 1.2 
[opencl_init] compiling program `demosaic_ppg.cl' ..
[opencl_fopen_stat] could not open file `C:\Users\av\AppData\Local\Microsoft\Windows\Temporary Internet Files\darktable/cached_kernels_for_IntelRHDGraphics4000/demosaic_ppg.cl.bin.b3458c53b134a281bf4c568e89378d28'!
[opencl_load_program] could not load cached binary program, trying to compile source
[opencl_load_program] successfully loaded program from `C:\darktable\share\darktable/kernels/demosaic_ppg.cl'
[opencl_build_program] could not build program: -11
[opencl_build_program] BUILD STATUS: -2
BUILD LOG:
:19:10: fatal error: 'common.h' file not found
#include "common.h"
         ^

error: front end compiler failed build.
[opencl_init] failed to compile program `demosaic_ppg.cl'!
[opencl_init] FINALLY: opencl is NOT AVAILABLE on this system.
[opencl_init] initial status of opencl enabled flag is OFF.

press any key to exit