Temporary header file '/tmp/siirSzMsGW/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#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/doctest/doctest.h"

  // add namespaces
  namespace doctest{typedef int tmp_add_type_1;}
  doctest::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace doctest{namespace assertType{typedef int tmp_add_type_2;}}
  doctest::assertType::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace doctest{namespace Color{typedef int tmp_add_type_3;}}
  doctest::Color::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace doctest{namespace detail{typedef int tmp_add_type_4;}}
  doctest::detail::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace doctest{namespace detail{namespace assertAction{typedef int tmp_add_type_5;}}}
  doctest::detail::assertAction::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace doctest{namespace detail{namespace binaryAssertComparison{typedef int tmp_add_type_6;}}}
  doctest::detail::binaryAssertComparison::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace doctest{namespace detail{namespace types{typedef int tmp_add_type_7;}}}
  doctest::detail::types::tmp_add_type_7 tmp_add_func_7(){return 0;};
  namespace doctest{namespace TestCaseFailureReason{typedef int tmp_add_type_8;}}
  doctest::TestCaseFailureReason::tmp_add_type_8 tmp_add_func_8(){return 0;};
  namespace doctest_detail_test_suite_ns{typedef int tmp_add_type_9;}
  doctest_detail_test_suite_ns::tmp_add_type_9 tmp_add_func_9(){return 0;};

  // add classes
  ucontext_t* tmp_add_class_0;

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