Temporary header file '/tmp/Rc4z22JucY/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/nanogui/include/fontstash.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/button.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/checkbox.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/colorpicker.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/colorwheel.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/combobox.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/common.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/entypo.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/formhelper.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/glcanvas.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/glutil.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/graph.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/imagepanel.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/imageview.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/label.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/layout.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/messagedialog.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/nanogui.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/object.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/opengl.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/popup.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/popupbutton.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/progressbar.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/python.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/screen.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/serializer/core.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/serializer/opengl.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/serializer/sparse.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/slider.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/stackedwidget.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/tabheader.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/tabwidget.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/textbox.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/theme.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/toolbutton.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/vscrollpanel.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/widget.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui/window.h"
  #include "/usr/include/mrpt/nanogui/include/nanogui-config.h"
  #include "/usr/include/mrpt/nanogui/include/nanovg.h"
  #include "/usr/include/mrpt/nanogui/include/nanovg_gl.h"
  #include "/usr/include/mrpt/nanogui/include/nanovg_gl_utils.h"
  #include "/usr/include/mrpt/nanogui/include/stb_image.h"
  #include "/usr/include/mrpt/nanogui/include/stb_truetype.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/Rc4z22JucY/dump1.h"  -I/usr/include/mrpt/nanogui/include

In file included from /usr/include/mrpt/nanogui/include/nanogui/object.h:15,
                 from /usr/include/mrpt/nanogui/include/nanogui/widget.h:15,
                 from /usr/include/mrpt/nanogui/include/nanogui/button.h:17,
                 from /tmp/Rc4z22JucY/dump1.h:13:
/usr/include/mrpt/nanogui/include/nanogui/common.h:30:10: fatal error: Eigen/Core: No such file or directory
   30 | #include <Eigen/Core>
      |          ^~~~~~~~~~~~
compilation terminated.

