dev-libs/log4cplus: Force C++11

Closes: https://bugs.gentoo.org/648714
Package-Manager: Portage-2.3.40, Repoman-2.3.9

dev-libs/log4cplus/log4cplus-1.2.0.ebuild

@@ -3,6 +3,8 @@
 
 EAPI=6
 
+inherit flag-o-matic
+
 DESCRIPTION="C++ port of the Log for Java (log4j) logging library"
 HOMEPAGE="http://log4cplus.sourceforge.net/ https://github.com/log4cplus/log4cplus"
 SRC_URI="mirror://sourceforge/project/${PN}/${PN}-stable/${PV}/${P}.tar.bz2"
@@ -24,6 +26,10 @@ DEPEND="${RDEPEND}
 PATCHES=( "${FILESDIR}/${PN}-1.2.0-fix-c++14.patch" )
 
 src_configure() {
+	# bug 648714
+	# Qt5 now requires C++11
+	append-cxxflags -std=c++11
+
 	econf \
 		--disable-static \
 		$(use_with iconv) \