Index: head/graphics/dspdfviewer/files/patch-hyperlinkarea.cpp
===================================================================
--- head/graphics/dspdfviewer/files/patch-hyperlinkarea.cpp
+++ head/graphics/dspdfviewer/files/patch-hyperlinkarea.cpp
@@ -0,0 +1,18 @@
+Fix build with modern Clang
+
+../hyperlinkarea.cpp:35:18: error: zero as null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
+  if ( pixmap == 0 )
+                 ^
+                 nullptr
+
+--- hyperlinkarea.cpp.orig	2018-03-11 12:58:40 UTC
++++ hyperlinkarea.cpp
+@@ -32,7 +32,7 @@ HyperlinkArea::HyperlinkArea(QLabel* ima
+     throw WrongLinkType();
+   QRect mySize;
+   const QPixmap* pixmap = imageLabel->pixmap();
+-  if ( pixmap == 0 )
++  if ( pixmap == nullptr )
+     throw /** FIXME Exception **/ std::runtime_error("Tried to construct a HyperlinkArea from an image label without a pixmap");
+   
+   QRectF sizeWithinImageLabel = link.linkArea();