Temporary header file '/tmp/XcZ647dIPm/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
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d) 
#define WEBRTC_POSIX
#define WEBRTC_AUDIO_PROCESSING_ONLY_BUILD

  // add includes
  #include "/usr/include/webrtc_audio_processing/webrtc/base/arraysize.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/base/basictypes.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/base/checks.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/base/constructormagic.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/base/maybe.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/base/platform_file.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/common.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/common_types.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/modules/audio_processing/beamformer/array_util.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/modules/audio_processing/include/audio_processing.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/modules/interface/module_common_types.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/system_wrappers/include/trace.h"
  #include "/usr/include/webrtc_audio_processing/webrtc/typedefs.h"

  // add namespaces
  namespace rtc{typedef int tmp_add_type_1;}
  rtc::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace webrtc{typedef int tmp_add_type_2;}
  webrtc::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace webrtc{namespace __anon4f428a486811{typedef int tmp_add_type_3;}}
  webrtc::__anon4f428a486811::tmp_add_type_3 tmp_add_func_3(){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/XcZ647dIPm/dump1.h"  -I/usr/include/webrtc_audio_processing