diff -up PyQt4_gpl_x11-4.12.3/qpy/QtCore/qpycore.pro.me PyQt4_gpl_x11-4.12.3/qpy/QtCore/qpycore.pro
--- PyQt4_gpl_x11-4.12.3/qpy/QtCore/qpycore.pro.me 2022-05-03 11:52:14.219428197 +0200
+++ PyQt4_gpl_x11-4.12.3/qpy/QtCore/qpycore.pro 2022-05-03 11:53:13.692813387 +0200
@@ -25,7 +25,7 @@ TEMPLATE = lib
DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x04ffff
# Python's type system relies on type punning.
-!win32: QMAKE_CXXFLAGS += -fno-strict-aliasing
+!win32: QMAKE_CXXFLAGS += -fno-strict-aliasing -fpermissive
# This seems to be necessary for Qt v4.5.2.
win32: INCLUDEPATH += .