Temporary header file '/tmp/857k9z8uOT/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#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/CCfits/AsciiTable.h"
  #include "/usr/include/CCfits/BinTable.h"
  #include "/usr/include/CCfits/CCfits.h"
  #include "/usr/include/CCfits/Column.h"
  #include "/usr/include/CCfits/ColumnCreator.h"
  #include "/usr/include/CCfits/ColumnData.h"
  #include "/usr/include/CCfits/ColumnT.h"
  #include "/usr/include/CCfits/ColumnVectorData.h"
  #include "/usr/include/CCfits/ExtHDU.h"
  #include "/usr/include/CCfits/ExtHDUT.h"
  #include "/usr/include/CCfits/FITS.h"
  #include "/usr/include/CCfits/FITSUtil.h"
  #include "/usr/include/CCfits/FITSUtilT.h"
  #include "/usr/include/CCfits/FitsError.h"
  #include "/usr/include/CCfits/GroupTable.h"
  #include "/usr/include/CCfits/HDU.h"
  #include "/usr/include/CCfits/HDUCreator.h"
  #include "/usr/include/CCfits/Image.h"
  #include "/usr/include/CCfits/ImageExt.h"
  #include "/usr/include/CCfits/KeyData.h"
  #include "/usr/include/CCfits/Keyword.h"
  #include "/usr/include/CCfits/KeywordCreator.h"
  #include "/usr/include/CCfits/KeywordT.h"
  #include "/usr/include/CCfits/NewKeyword.h"
  #include "/usr/include/CCfits/PHDU.h"
  #include "/usr/include/CCfits/PHDUT.h"
  #include "/usr/include/CCfits/PrimaryHDU.h"
  #include "/usr/include/CCfits/Table.h"

  // add namespaces
  namespace CCfits{typedef int tmp_add_type_1;}
  CCfits::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace CCfits{namespace FITSUtil{typedef int tmp_add_type_2;}}
  CCfits::FITSUtil::tmp_add_type_2 tmp_add_func_2(){return 0;};

  // add classes
  _G_fpos64_t* tmp_add_class_0;
  _G_fpos_t* tmp_add_class_1;
  _IO_cookie_io_functions_t* tmp_add_class_2;
  statx_timestamp* tmp_add_class_3;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/857k9z8uOT/dump1.h"