Temporary header file '/tmp/hl6MJ9q8fI/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/usbguard/Audit.hpp"
  #include "/usr/include/usbguard/ConfigFile.hpp"
  #include "/usr/include/usbguard/Device.hpp"
  #include "/usr/include/usbguard/DeviceManager.hpp"
  #include "/usr/include/usbguard/DeviceManagerHooks.hpp"
  #include "/usr/include/usbguard/Exception.hpp"
  #include "/usr/include/usbguard/IPCClient.hpp"
  #include "/usr/include/usbguard/IPCServer.hpp"
  #include "/usr/include/usbguard/Interface.hpp"
  #include "/usr/include/usbguard/KeyValueParser.hpp"
  #include "/usr/include/usbguard/Logger.hpp"
  #include "/usr/include/usbguard/MemoryRuleSet.hpp"
  #include "/usr/include/usbguard/Policy.hpp"
  #include "/usr/include/usbguard/Predicates.hpp"
  #include "/usr/include/usbguard/Rule.hpp"
  #include "/usr/include/usbguard/RuleCondition.hpp"
  #include "/usr/include/usbguard/RuleSet.hpp"
  #include "/usr/include/usbguard/Typedefs.hpp"
  #include "/usr/include/usbguard/USB.hpp"
  #include "/usr/include/usbguard/USBGuard.hpp"

  // add namespaces
  namespace usbguard{typedef int tmp_add_type_1;}
  usbguard::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace usbguard{namespace Predicates{typedef int tmp_add_type_2;}}
  usbguard::Predicates::tmp_add_type_2 tmp_add_func_2(){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/hl6MJ9q8fI/dump1.h"