Temporary header file '/tmp/LYXTT4FbAE/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
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/wels/codec_api.h"
  #include "/usr/include/wels/codec_app_def.h"
  #include "/usr/include/wels/codec_def.h"
  #include "/usr/include/wels/codec_ver.h"

  // add classes
  ISVCDecoder* tmp_add_class_0;
  ISVCEncoder* tmp_add_class_1;
  SliceInformation* tmp_add_class_2;
  Source_Picture_s* tmp_add_class_3;
  TagBitrateInfo* tmp_add_class_4;
  TagBufferInfo* tmp_add_class_5;
  TagDecoderCapability* tmp_add_class_6;
  TagDeliveryStatus* tmp_add_class_7;
  TagDumpLayer* tmp_add_class_8;
  TagEncParamBase* tmp_add_class_9;
  TagEncParamExt* tmp_add_class_10;
  TagLevelInfo* tmp_add_class_11;
  TagParserBsInfo* tmp_add_class_12;
  TagProfileInfo* tmp_add_class_13;
  TagSVCDecodingParam* tmp_add_class_14;
  TagSysMemBuffer* tmp_add_class_15;
  TagVideoDecoderStatistics* tmp_add_class_16;
  TagVideoEncoderStatistics* tmp_add_class_17;
  TagVuiSarInfo* tmp_add_class_18;
  _tagVersion* tmp_add_class_19;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/LYXTT4FbAE/dump1.h"