Index: devel/qt5-qdoc/Makefile
===================================================================
--- devel/qt5-qdoc/Makefile
+++ devel/qt5-qdoc/Makefile
@@ -2,6 +2,7 @@
 
 PORTNAME=	qdoc
 DISTVERSION=	${QT5_VERSION}
+PORTREVISION=	1
 CATEGORIES=	devel textproc
 PKGNAMEPREFIX=	qt5-
 
@@ -17,4 +18,10 @@
 
 PLIST_FILES=	${QT_BINDIR}/qdoc
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} < 1000000
+EXTRA_PATCHES=	${FILESDIR}/extrapatch-src_qdoc_qdocindexfiles.cpp
+.endif
+
+.include <bsd.port.post.mk>
Index: devel/qt5-qdoc/files/extrapatch-src_qdoc_qdocindexfiles.cpp
===================================================================
--- /dev/null
+++ devel/qt5-qdoc/files/extrapatch-src_qdoc_qdocindexfiles.cpp
@@ -0,0 +1,21 @@
+There is a bug [1] in the old gcc used on FreeBSD 9.3, which makes
+qdoc segfault on sorting while generating its index sections.
+
+As mentioned in [2] by Michael Hansen, we can circument this by using
+qSort instead of std::sort on FreeBSD 9.x.
+
+
+[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59391
+[2] https://bugreports.qt.io/browse/QTBUG-43057
+
+--- src/qdoc/qdocindexfiles.cpp.orig	2016-10-02 07:52:39 UTC
++++ src/qdoc/qdocindexfiles.cpp
+@@ -1476,7 +1476,7 @@ void QDocIndexFiles::generateIndexSectio
+             const Aggregate* inner = static_cast<const Aggregate*>(node);
+
+             NodeList cnodes = inner->childNodes();
+-            std::sort(cnodes.begin(), cnodes.end(), compareNodes);
++            qSort(cnodes.begin(), cnodes.end(), compareNodes);
+
+             foreach (Node* child, cnodes) {
+                 generateIndexSections(writer, child, generateInternalNodes);