Temporary header file '/tmp/FD7B1N21o7/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/ois/OIS.h"
  #include "/usr/include/ois/OISConfig.h"
  #include "/usr/include/ois/OISEffect.h"
  #include "/usr/include/ois/OISEvents.h"
  #include "/usr/include/ois/OISException.h"
  #include "/usr/include/ois/OISFactoryCreator.h"
  #include "/usr/include/ois/OISForceFeedback.h"
  #include "/usr/include/ois/OISInputManager.h"
  #include "/usr/include/ois/OISInterface.h"
  #include "/usr/include/ois/OISJoyStick.h"
  #include "/usr/include/ois/OISKeyboard.h"
  #include "/usr/include/ois/OISMouse.h"
  #include "/usr/include/ois/OISMultiTouch.h"
  #include "/usr/include/ois/OISObject.h"
  #include "/usr/include/ois/OISPrereqs.h"

  // add namespaces
  namespace OIS{typedef int tmp_add_type_1;}
  OIS::tmp_add_type_1 tmp_add_func_1(){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/FD7B1N21o7/dump1.h"