https://github.com/damianatorrpm/wayfire-plugin_dbus_interface/commit/c7cc8e11e7f8

In file included from ../subprojects/dbus/dbus_interface.cpp:12:
In file included from /usr/local/include/glib-2.0/gio/gio.h:26:
In file included from /usr/local/include/glib-2.0/gio/giotypes.h:28:
In file included from /usr/local/include/glib-2.0/gio/gioenums.h:28:
In file included from /usr/local/include/glib-2.0/glib-object.h:22:
In file included from /usr/local/include/glib-2.0/gobject/gbinding.h:28:
In file included from /usr/local/include/glib-2.0/glib.h:32:
In file included from /usr/local/include/glib-2.0/glib/gasyncqueue.h:32:
In file included from /usr/local/include/glib-2.0/glib/gthread.h:32:
In file included from /usr/local/include/glib-2.0/glib/gatomic.h:28:
In file included from /usr/local/include/glib-2.0/glib/glib-typeof.h:39:
In file included from /usr/include/c++/v1/type_traits:420:
/usr/include/c++/v1/cstddef:56:1: error: templates must have C++ linkage
template <class _Tp> struct __libcpp_is_integral                     { enum { value = 0 }; };
^~~~~~~~~~~~~~~~~~~~
../subprojects/dbus/dbus_interface.cpp:10:1: note: extern "C" language linkage specification begins here
extern "C"
^

--- subprojects/dbus/dbus_interface.cpp.orig	2020-12-25 14:04:08 UTC
+++ subprojects/dbus/dbus_interface.cpp
@@ -9,11 +9,11 @@
 
 extern "C"
 {
-#include <gio/gio.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 };
 
+#include <gio/gio.h>
 #include <iostream>
 #include <string>
 #include <charconv>
--- subprojects/dbus/dbus_interface_backend.cpp.orig	2020-12-25 14:04:08 UTC
+++ subprojects/dbus/dbus_interface_backend.cpp
@@ -16,11 +16,11 @@ extern "C"
 // #include <xwayland/xwm.h>
 #undef static
 #undef class
-#include <gio/gio.h>
 #include <sys/socket.h>
 #include <wlr/types/wlr_idle.h>
 };
 
+#include <gio/gio.h>
 #include <ctime>
 #include <iostream>
 #include <set>
--- subprojects/dbus/wf-prop.cpp.orig	2020-12-25 14:04:08 UTC
+++ subprojects/dbus/wf-prop.cpp
@@ -6,10 +6,7 @@
 #define DBUS_ID "org.wayland.compositor"
 #define DBUS_PATH "/org/wayland/compositor"
 
-extern "C" {
 #include <gio/gio.h>
-};
-
 #include <giomm/application.h>
 #include <giomm/dbusconnection.h>
 #include <giomm/dbusproxy.h>