Temporary header file '/tmp/sw3L3dj8ai/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/lua5.1/lua-rex-posix.h"
  #include "/usr/include/lua5.2/lua-rex-posix.h"
  #include "/usr/include/lua5.3/lua-rex-posix.h"
  #include "/usr/include/lua5.4/lua-rex-posix.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/sw3L3dj8ai/dump1.h"

In file included from /tmp/sw3L3dj8ai/dump1.h:12:
/usr/include/lua5.1/lua-rex-posix.h:3:30: error: ‘lua_State’ was not declared in this scope
    3 | extern int luaopen_rex_posix(lua_State*);
      |                              ^~~~~~~~~
/usr/include/lua5.1/lua-rex-posix.h:3:40: error: expected primary-expression before ‘)’ token
    3 | extern int luaopen_rex_posix(lua_State*);
      |                                        ^
In file included from /tmp/sw3L3dj8ai/dump1.h:13:
/usr/include/lua5.2/lua-rex-posix.h:3:12: error: redefinition of ‘int luaopen_rex_posix’
    3 | extern int luaopen_rex_posix(lua_State*);
      |            ^~~~~~~~~~~~~~~~~
/usr/include/lua5.1/lua-rex-posix.h:3:12: note: ‘int luaopen_rex_posix’ previously defined here
    3 | extern int luaopen_rex_posix(lua_State*);
      |            ^~~~~~~~~~~~~~~~~
/usr/include/lua5.2/lua-rex-posix.h:3:30: error: ‘lua_State’ was not declared in this scope
    3 | extern int luaopen_rex_posix(lua_State*);
      |                              ^~~~~~~~~
/usr/include/lua5.2/lua-rex-posix.h:3:40: error: expected primary-expression before ‘)’ token
    3 | extern int luaopen_rex_posix(lua_State*);
      |                                        ^
In file included from /tmp/sw3L3dj8ai/dump1.h:14:
/usr/include/lua5.3/lua-rex-posix.h:3:12: error: redefinition of ‘int luaopen_rex_posix’
    3 | extern int luaopen_rex_posix(lua_State*);
      |            ^~~~~~~~~~~~~~~~~
/usr/include/lua5.1/lua-rex-posix.h:3:12: note: ‘int luaopen_rex_posix’ previously defined here
    3 | extern int luaopen_rex_posix(lua_State*);
      |            ^~~~~~~~~~~~~~~~~
/usr/include/lua5.3/lua-rex-posix.h:3:30: error: ‘lua_State’ was not declared in this scope
    3 | extern int luaopen_rex_posix(lua_State*);
      |                              ^~~~~~~~~
/usr/include/lua5.3/lua-rex-posix.h:3:40: error: expected primary-expression before ‘)’ token
    3 | extern int luaopen_rex_posix(lua_State*);
      |                                        ^
In file included from /tmp/sw3L3dj8ai/dump1.h:15:
/usr/include/lua5.4/lua-rex-posix.h:3:12: error: redefinition of ‘int luaopen_rex_posix’
    3 | extern int luaopen_rex_posix(lua_State*);
      |            ^~~~~~~~~~~~~~~~~
/usr/include/lua5.1/lua-rex-posix.h:3:12: note: ‘int luaopen_rex_posix’ previously defined here
    3 | extern int luaopen_rex_posix(lua_State*);
      |            ^~~~~~~~~~~~~~~~~
/usr/include/lua5.4/lua-rex-posix.h:3:30: error: ‘lua_State’ was not declared in this scope
    3 | extern int luaopen_rex_posix(lua_State*);
      |                              ^~~~~~~~~
/usr/include/lua5.4/lua-rex-posix.h:3:40: error: expected primary-expression before ‘)’ token
    3 | extern int luaopen_rex_posix(lua_State*);
      |                                        ^