Temporary header file '/tmp/lfUgze45bK/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _GXX_NULLPTR_T
#define CLUTTER_ENABLE_COMPOSITOR_API 1
#define _REGEX_NELTS(n)
#define _Atomic
#define PACKED
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/mrpt/img/include/mrpt/3rdparty/do_opencv_includes.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/CCanvas.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/CEnhancedMetaFile.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/CImage.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/CMappedImage.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/DistortionModel.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/TCamera.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/TColor.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/TColorManager.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/TPixelCoord.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/TStereoCamera.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/color_maps.h"
  #include "/usr/include/mrpt/img/include/mrpt/img/registerAllClasses.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/lfUgze45bK/dump1.h"  -I/usr/include/mrpt/typemeta/include -I/usr/include/mrpt/system/include -I/usr/include/mrpt/serialization/include -I/usr/include/mrpt/rtti/include -I/usr/include/mrpt/math/include -I/usr/include/mrpt/img/include -I/usr/include/mrpt/core/include -I/usr/include/mrpt/containers/include -I/usr/include/mrpt/config/include

In file included from /tmp/lfUgze45bK/dump1.h:12:
/usr/include/mrpt/img/include/mrpt/3rdparty/do_opencv_includes.h:25:10: fatal error: opencv2/opencv_modules.hpp: No such file or directory
   25 | #include <opencv2/opencv_modules.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

