https://bugs.gentoo.org/788199

'volatile gsize' is not accepted by with gcc11 / clang12

"While location has a volatile qualifier, this is a historical
 artifact and the pointer passed to it should not be volatile"
https://developer.gnome.org/glib/stable/glib-Threads.html#g-once-init-enter

For Scintilla GTK, see also:
https://sourceforge.net/p/scintilla/code/ci/790bfd4c0747eb5e0bc4d627a101298207a8421e/

Also adds missing <memory> includes.

Signed-off-by: Ionen Wolkens <sudinave@gmail.com>
--- a/ext/scintilla/gtk/ScintillaGTKAccessible.cxx
+++ b/ext/scintilla/gtk/ScintillaGTKAccessible.cxx
@@ -1011,5 +1011,5 @@
 // @p parent_type is only required on GTK 3.2 to 3.6, and only on the first call
 static GType scintilla_object_accessible_get_type(GType parent_type G_GNUC_UNUSED) {
-	static volatile gsize type_id_result = 0;
+	static gsize type_id_result = 0;
 
 	if (g_once_init_enter(&type_id_result)) {
@@ -1102,5 +1102,5 @@
 	*cache = scintilla_object_accessible_new(0, G_OBJECT(widget));
 #elif HAVE_GTK_FACTORY // register in the factory and let GTK instantiate
-	static volatile gsize registered = 0;
+	static gsize registered = 0;
 
 	if (g_once_init_enter(&registered)) {
--- a/library/forms/gtk/src/mforms_acc.cpp
+++ b/library/forms/gtk/src/mforms_acc.cpp
@@ -177,5 +177,5 @@
     // @p parent_type is only required on GTK 3.2 to 3.6, and only on the first call
     GType mforms_object_accessible_get_type(GType parent_type G_GNUC_UNUSED) {
-      static volatile gsize typeIdResult = 0;
+      static gsize typeIdResult = 0;
 
       if (g_once_init_enter(&typeIdResult)) {
--- a/library/ssh/SSHCommon.h
+++ b/library/ssh/SSHCommon.h
@@ -42,4 +42,5 @@
 #include <thread>
 #include <atomic>
+#include <memory>
 #include <mutex>
 
--- a/library/ssh/SSHTunnelHandler.h
+++ b/library/ssh/SSHTunnelHandler.h
@@ -31,4 +31,5 @@
 #include <thread>
 #include <map>
+#include <memory>
 #include <mutex>
 #include <vector>