diff --git a/3rdparty/QtPropertyBrowser/src/qteditorfactory.cpp b/3rdparty/QtPropertyBrowser/src/qteditorfactory.cpp
index a2ef86c9..7cd130f3 100644
--- a/3rdparty/QtPropertyBrowser/src/qteditorfactory.cpp
+++ b/3rdparty/QtPropertyBrowser/src/qteditorfactory.cpp
@@ -2207,9 +2207,9 @@ void QtColorEditWidget::buttonClicked()
 {
     bool ok = false;
     QRgb oldRgba = m_color.rgba();
-    QRgb newRgba = QColorDialog::getRgba(oldRgba, &ok, this);
-    if (ok && newRgba != oldRgba) {
-        setValue(QColor::fromRgba(newRgba));
+    QColor newRgba = QColorDialog::getColor(oldRgba, this).rgba();
+    if (newRgba.isValid() && newRgba.rgba() != oldRgba) {
+        setValue(newRgba);
         emit valueChanged(m_color);
     }
 }
diff --git a/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.cpp b/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.cpp
index bdca7dd5..408d7972 100644
--- a/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.cpp
+++ b/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.cpp
@@ -609,7 +609,7 @@ void QtTreePropertyBrowserPrivate::propertyInserted(QtBrowserItem *index, QtBrow
     m_indexToItem[index] = newItem;
 
     newItem->setFlags(newItem->flags() | Qt::ItemIsEditable);
-    m_treeWidget->setItemExpanded(newItem, true);
+    newItem->setExpanded(true);
 
     updateItem(newItem);
 }
diff --git a/3rdparty/QtPropertyBrowser/src/qtvariantproperty.cpp b/3rdparty/QtPropertyBrowser/src/qtvariantproperty.cpp
index 03f9688c..12ea87f6 100644
--- a/3rdparty/QtPropertyBrowser/src/qtvariantproperty.cpp
+++ b/3rdparty/QtPropertyBrowser/src/qtvariantproperty.cpp
@@ -576,7 +576,7 @@ void QtVariantPropertyManagerPrivate::slotValueChanged(QtProperty *property, con
 void QtVariantPropertyManagerPrivate::slotValueChanged(QtProperty *property, const QKeySequence &val)
 {
     QVariant v;
-    qVariantSetValue(v, val);
+    v.setValue(val);
     valueChanged(property, v);
 }
 
@@ -663,7 +663,7 @@ void QtVariantPropertyManagerPrivate::slotEnumIconsChanged(QtProperty *property,
 {
     if (QtVariantProperty *varProp = m_internalToProperty.value(property, 0)) {
         QVariant v;
-        qVariantSetValue(v, enumIcons);
+        v.setValue(enumIcons);
         emit q_ptr->attributeChanged(varProp, m_enumIconsAttribute, v);
     }
 }
@@ -1567,7 +1567,7 @@ QVariant QtVariantPropertyManager::attributeValue(const QtProperty *property, co
             return enumManager->enumNames(internProp);
         if (attribute == d_ptr->m_enumIconsAttribute) {
             QVariant v;
-            qVariantSetValue(v, enumManager->enumIcons(internProp));
+            v.setValue(enumManager->enumIcons(internProp));
             return v;
         }
         return QVariant();
diff --git a/3rdparty/imgui/imgui_internal.h b/3rdparty/imgui/imgui_internal.h
index e347e64f..7e06cb63 100644
--- a/3rdparty/imgui/imgui_internal.h
+++ b/3rdparty/imgui/imgui_internal.h
@@ -27,6 +27,9 @@
 #pragma clang diagnostic ignored "-Wunused-function"        // for stb_textedit.h
 #pragma clang diagnostic ignored "-Wmissing-prototypes"     // for stb_textedit.h
 #pragma clang diagnostic ignored "-Wold-style-cast"
+#elif defined(__GNUC__) && __GNUC__ >= 8
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wclass-memaccess"
 #endif
 
 //-----------------------------------------------------------------------------
diff --git a/generic/pack.cc b/generic/pack.cc
index e92e04c5..f1cfd0b2 100644
--- a/generic/pack.cc
+++ b/generic/pack.cc
@@ -112,17 +112,6 @@ static void pack_nonlut_ffs(Context *ctx)
     }
 }
 
-static bool net_is_constant(const Context *ctx, NetInfo *net, bool &value)
-{
-    if (net == nullptr)
-        return false;
-    if (net->name == ctx->id("$PACKER_GND_NET") || net->name == ctx->id("$PACKER_VCC_NET")) {
-        value = (net->name == ctx->id("$PACKER_VCC_NET"));
-        return true;
-    } else {
-        return false;
-    }
-}
 
 // Merge a net into a constant net
 static void set_net_constant(const Context *ctx, NetInfo *orig, NetInfo *constnet, bool constval)
diff --git a/gui/treemodel.cc b/gui/treemodel.cc
index b834c682..97cc8883 100644
--- a/gui/treemodel.cc
+++ b/gui/treemodel.cc
@@ -93,7 +93,7 @@ void IdStringList::updateElements(Context *ctx, std::vector<IdString> elements)
     }
 
     // Sort new children
-    qSort(children_.begin(), children_.end(), [&](const Item *a, const Item *b) {
+    std::sort(children_.begin(), children_.end(), [&](const Item *a, const Item *b) {
         auto parts_a = alphaNumSplit(a->name());
         auto parts_b = alphaNumSplit(b->name());