Temporary header file '/tmp/dSx7U_fx8y/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/zopfli/blocksplitter.h"
  #include "/usr/include/zopfli/cache.h"
  #include "/usr/include/zopfli/deflate.h"
  #include "/usr/include/zopfli/gzip_container.h"
  #include "/usr/include/zopfli/hash.h"
  #include "/usr/include/zopfli/katajainen.h"
  #include "/usr/include/zopfli/lz77.h"
  #include "/usr/include/zopfli/squeeze.h"
  #include "/usr/include/zopfli/symbols.h"
  #include "/usr/include/zopfli/tree.h"
  #include "/usr/include/zopfli/util.h"
  #include "/usr/include/zopfli/zlib_container.h"
  #include "/usr/include/zopfli/zopfli.h"

  // add classes
  ZopfliBlockState* tmp_add_class_0;
  ZopfliHash* tmp_add_class_1;
  ZopfliLZ77Store* tmp_add_class_2;
  ZopfliLongestMatchCache* tmp_add_class_3;
  ZopfliOptions* tmp_add_class_4;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/dSx7U_fx8y/dump1.h"