Temporary header file '/tmp/6IfFGe3hq7/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
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/shrinkwrap/gz.hpp"
  #include "/usr/include/shrinkwrap/istream.hpp"
  #include "/usr/include/shrinkwrap/stdio.hpp"
  #include "/usr/include/shrinkwrap/xz.hpp"
  #include "/usr/include/shrinkwrap/zstd.hpp"

  // add namespaces
  namespace shrinkwrap{typedef int tmp_add_type_1;}
  shrinkwrap::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace shrinkwrap{namespace bgzf{typedef int tmp_add_type_2;}}
  shrinkwrap::bgzf::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace shrinkwrap{namespace detail{typedef int tmp_add_type_3;}}
  shrinkwrap::detail::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace shrinkwrap{namespace gz{typedef int tmp_add_type_4;}}
  shrinkwrap::gz::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace shrinkwrap{namespace stdio{typedef int tmp_add_type_5;}}
  shrinkwrap::stdio::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace shrinkwrap{namespace xz{typedef int tmp_add_type_6;}}
  shrinkwrap::xz::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace shrinkwrap{namespace zstd{typedef int tmp_add_type_7;}}
  shrinkwrap::zstd::tmp_add_type_7 tmp_add_func_7(){return 0;};

  // add classes
  ZSTD_inBuffer_s* tmp_add_class_0;
  ZSTD_outBuffer_s* tmp_add_class_1;
  _G_fpos64_t* tmp_add_class_2;
  _G_fpos_t* tmp_add_class_3;
  _IO_cookie_io_functions_t* tmp_add_class_4;
  gzFile_s* tmp_add_class_5;
  gz_header_s* tmp_add_class_6;
  z_stream_s* tmp_add_class_7;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/6IfFGe3hq7/dump1.h"