https://sourceforge.net/p/guitarix/git/ci/d8f003484c57d808682025dfb07a7a1fb848afdc/
Issue #63 - Fix build on gcc 11

--- src/headers/gx_system.h.orig
+++ src/headers/gx_system.h
@@ -132,7 +132,7 @@
 
 template <class T>
 inline bool atomic_compare_and_exchange(T **p, T *oldv, T *newv) {
-    return g_atomic_pointer_compare_and_exchange(reinterpret_cast<void* volatile*>(p), static_cast<void*>(oldv), newv);
+    return g_atomic_pointer_compare_and_exchange(reinterpret_cast<void**>(p), static_cast<void*>(oldv), newv);
 }
