Index: devel/qt4-linguist/files/patch-tools__linguist__linguist__messagemodel.cpp
===================================================================
--- /dev/null
+++ devel/qt4-linguist/files/patch-tools__linguist__linguist__messagemodel.cpp
@@ -0,0 +1,14 @@
+Nonsensical pointer comparison caught by Clang 4.0. findMessage()
+returns NULL on not-found.
+
+--- tools/linguist/linguist/messagemodel.cpp.orig	2017-01-14 22:08:09.527076000 +0100
++++ tools/linguist/linguist/messagemodel.cpp	2017-01-14 22:08:34.096069000 +0100
+@@ -183,7 +183,7 @@
+         if (ContextItem *c = one->findContext(oc->context())) {
+             for (int j = 0; j < oc->messageCount(); ++j) {
+                 MessageItem *m = oc->messageItem(j);
+-                if (c->findMessage(m->text(), m->comment()) >= 0)
++                if (c->findMessage(m->text(), m->comment()) != 0)
+                     ++inBoth;
+             }
+         }