Temporary header file '/tmp/XK9wnQHZNg/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _TIME_BITS 64
#define _FILE_OFFSET_BITS 64
#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/FreeImagePlus.h"

  // add classes
  FIBITMAP* tmp_add_class_0;
  FIICCPROFILE* tmp_add_class_1;
  FIMEMORY* tmp_add_class_2;
  FIMETADATA* tmp_add_class_3;
  FIMULTIBITMAP* tmp_add_class_4;
  FITAG* tmp_add_class_5;
  FreeImageIO* tmp_add_class_6;
  Plugin* tmp_add_class_7;
  fipImage* tmp_add_class_8;
  fipMemoryIO* tmp_add_class_9;
  fipMetadataFind* tmp_add_class_10;
  fipMultiPage* tmp_add_class_11;
  fipObject* tmp_add_class_12;
  fipTag* tmp_add_class_13;
  tagBITMAPINFO* tmp_add_class_14;
  tagBITMAPINFOHEADER* tmp_add_class_15;
  tagFICOMPLEX* tmp_add_class_16;
  tagFIRGB16* tmp_add_class_17;
  tagFIRGBA16* tmp_add_class_18;
  tagFIRGBAF* tmp_add_class_19;
  tagFIRGBF* tmp_add_class_20;
  tagRGBQUAD* tmp_add_class_21;
  tagRGBTRIPLE* tmp_add_class_22;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/XK9wnQHZNg/dump1.h"