extern const char *ff_opencl_source_colorspace_common;
extern const char *ff_opencl_source_convolution;
extern const char *ff_opencl_source_neighbor;
+extern const char *ff_opencl_source_nlmeans;
extern const char *ff_opencl_source_overlay;
extern const char *ff_opencl_source_tonemap;
extern const char *ff_opencl_source_transpose;