Temporary header file '/tmp/WqeGHG96Pq/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/gtest/gtest-assertion-result.h"
  #include "/usr/include/gtest/gtest-death-test.h"
  #include "/usr/include/gtest/gtest-matchers.h"
  #include "/usr/include/gtest/gtest-message.h"
  #include "/usr/include/gtest/gtest-param-test.h"
  #include "/usr/include/gtest/gtest-printers.h"
  #include "/usr/include/gtest/gtest-spi.h"
  #include "/usr/include/gtest/gtest-test-part.h"
  #include "/usr/include/gtest/gtest-typed-test.h"
  #include "/usr/include/gtest/gtest.h"
  #include "/usr/include/gtest/gtest_pred_impl.h"
  #include "/usr/include/gtest/gtest_prod.h"
  #include "/usr/include/gtest/internal/custom/gtest-port.h"
  #include "/usr/include/gtest/internal/custom/gtest-printers.h"
  #include "/usr/include/gtest/internal/custom/gtest.h"
  #include "/usr/include/gtest/internal/gtest-death-test-internal.h"
  #include "/usr/include/gtest/internal/gtest-filepath.h"
  #include "/usr/include/gtest/internal/gtest-internal.h"
  #include "/usr/include/gtest/internal/gtest-param-util.h"
  #include "/usr/include/gtest/internal/gtest-port-arch.h"
  #include "/usr/include/gtest/internal/gtest-port.h"
  #include "/usr/include/gtest/internal/gtest-string.h"
  #include "/usr/include/gtest/internal/gtest-type-util.h"

  // add namespaces
  namespace proto2{typedef int tmp_add_type_1;}
  proto2::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace testing{typedef int tmp_add_type_2;}
  testing::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace testing{namespace internal{typedef int tmp_add_type_3;}}
  testing::internal::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace testing{namespace internal{namespace posix{typedef int tmp_add_type_4;}}}
  testing::internal::posix::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace testing{namespace internal{namespace edit_distance{typedef int tmp_add_type_5;}}}
  testing::internal::edit_distance::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace testing{namespace internal{namespace internal_stream_operator_without_lexical_name_lookup{typedef int tmp_add_type_6;}}}
  testing::internal::internal_stream_operator_without_lexical_name_lookup::tmp_add_type_6 tmp_add_func_6(){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;
  re_pattern_buffer* tmp_add_class_3;
  re_registers* tmp_add_class_4;
  statx_timestamp* tmp_add_class_5;
  ucontext_t* tmp_add_class_6;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/WqeGHG96Pq/dump1.h"