Temporary header file '/tmp/TmLd_XQOLX/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/mrpt/tclap/include/mrpt/3rdparty/tclap/Arg.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/ArgException.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/CmdLine.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/CmdLineInterface.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/CmdLineOutput.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/Constraint.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/DocBookOutput.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/HelpVisitor.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/IgnoreRestVisitor.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/MultiArg.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/MultiSwitchArg.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/OptionalUnlabeledTracker.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/StdOutput.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/SwitchArg.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/UnlabeledMultiArg.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/UnlabeledValueArg.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/ValueArg.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/ValuesConstraint.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/VersionVisitor.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/Visitor.h"
  #include "/usr/include/mrpt/tclap/include/mrpt/3rdparty/tclap/XorHandler.h"

  // add namespaces
  namespace TCLAP{typedef int tmp_add_type_1;}
  TCLAP::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace TCLAP{namespace MULTI_ARG_HELPER{typedef int tmp_add_type_2;}}
  TCLAP::MULTI_ARG_HELPER::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace TCLAP{namespace VALUE_ARG_HELPER{typedef int tmp_add_type_3;}}
  TCLAP::VALUE_ARG_HELPER::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/TmLd_XQOLX/dump1.h"  -I/usr/include/mrpt/tclap/include