Temporary header file '/tmp/9YctMyG5A6/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/ebml/Debug.h"
  #include "/usr/include/ebml/EbmlBinary.h"
  #include "/usr/include/ebml/EbmlConfig.h"
  #include "/usr/include/ebml/EbmlContexts.h"
  #include "/usr/include/ebml/EbmlCrc32.h"
  #include "/usr/include/ebml/EbmlDate.h"
  #include "/usr/include/ebml/EbmlDummy.h"
  #include "/usr/include/ebml/EbmlElement.h"
  #include "/usr/include/ebml/EbmlEndian.h"
  #include "/usr/include/ebml/EbmlFloat.h"
  #include "/usr/include/ebml/EbmlHead.h"
  #include "/usr/include/ebml/EbmlId.h"
  #include "/usr/include/ebml/EbmlMaster.h"
  #include "/usr/include/ebml/EbmlSInteger.h"
  #include "/usr/include/ebml/EbmlStream.h"
  #include "/usr/include/ebml/EbmlString.h"
  #include "/usr/include/ebml/EbmlSubHead.h"
  #include "/usr/include/ebml/EbmlTypes.h"
  #include "/usr/include/ebml/EbmlUInteger.h"
  #include "/usr/include/ebml/EbmlUnicodeString.h"
  #include "/usr/include/ebml/EbmlVersion.h"
  #include "/usr/include/ebml/EbmlVoid.h"
  #include "/usr/include/ebml/IOCallback.h"
  #include "/usr/include/ebml/MemIOCallback.h"
  #include "/usr/include/ebml/MemReadIOCallback.h"
  #include "/usr/include/ebml/SafeReadIOCallback.h"
  #include "/usr/include/ebml/StdIOCallback.h"
  #include "/usr/include/ebml/c/libebml_t.h"
  #include "/usr/include/ebml/ebml_export.h"

  // add namespaces
  namespace libebml{typedef int tmp_add_type_1;}
  libebml::tmp_add_type_1 tmp_add_func_1(){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;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/9YctMyG5A6/dump1.h"