Temporary header file '/tmp/RxplSSRj7J/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/ZXing/BarcodeFormat.h"
  #include "/usr/include/ZXing/BitHacks.h"
  #include "/usr/include/ZXing/BitMatrix.h"
  #include "/usr/include/ZXing/BitMatrixIO.h"
  #include "/usr/include/ZXing/ByteArray.h"
  #include "/usr/include/ZXing/CharacterSet.h"
  #include "/usr/include/ZXing/CharacterSetECI.h"
  #include "/usr/include/ZXing/Content.h"
  #include "/usr/include/ZXing/DecodeHints.h"
  #include "/usr/include/ZXing/DecodeStatus.h"
  #include "/usr/include/ZXing/Error.h"
  #include "/usr/include/ZXing/Flags.h"
  #include "/usr/include/ZXing/GTIN.h"
  #include "/usr/include/ZXing/ImageView.h"
  #include "/usr/include/ZXing/Matrix.h"
  #include "/usr/include/ZXing/MultiFormatWriter.h"
  #include "/usr/include/ZXing/Point.h"
  #include "/usr/include/ZXing/Quadrilateral.h"
  #include "/usr/include/ZXing/ReadBarcode.h"
  #include "/usr/include/ZXing/Result.h"
  #include "/usr/include/ZXing/StructuredAppend.h"
  #include "/usr/include/ZXing/TextUtfEncoding.h"
  #include "/usr/include/ZXing/ZXAlgorithms.h"
  #include "/usr/include/ZXing/ZXConfig.h"
  #include "/usr/include/ZXing/ZXVersion.h"

  // add namespaces
  namespace ZXing{typedef int tmp_add_type_1;}
  ZXing::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace ZXing{namespace BitHacks{typedef int tmp_add_type_2;}}
  ZXing::BitHacks::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace ZXing{namespace CharacterSetECI{typedef int tmp_add_type_3;}}
  ZXing::CharacterSetECI::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace ZXing{namespace GTIN{typedef int tmp_add_type_4;}}
  ZXing::GTIN::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace ZXing{namespace TextUtfEncoding{typedef int tmp_add_type_5;}}
  ZXing::TextUtfEncoding::tmp_add_type_5 tmp_add_func_5(){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/RxplSSRj7J/dump1.h"