Index: head/accessibility/atkmm/Makefile
===================================================================
--- head/accessibility/atkmm/Makefile
+++ head/accessibility/atkmm/Makefile
@@ -13,7 +13,8 @@
 
 LICENSE=	LGPL20
 
-USES=		gmake localbase libtool pathfix pkgconfig tar:xz
+USES=		compiler:c++11-lang gmake localbase libtool pathfix \
+		pkgconfig tar:xz
 USE_GNOME=	atk glibmm
 USE_LDCONFIG=	yes
 GNU_CONFIGURE=	yes
Index: head/devel/appstream-glib/Makefile
===================================================================
--- head/devel/appstream-glib/Makefile
+++ head/devel/appstream-glib/Makefile
@@ -44,4 +44,12 @@
 		docbook-xsl>=0:textproc/docbook-xsl
 MANPAGES_USE=	GNOME=libxslt:build
 
+.include <bsd.port.options.mk>
+
+.if ${ARCH} == powerpc || ${ARCH} == powerpc64
+post-patch:
+	@${REINPLACE_CMD} -e 's|-Wtype-limits||g' \
+		${WRKSRC}/configure
+.endif
+
 .include <bsd.port.mk>
Index: head/devel/glib20/Makefile
===================================================================
--- head/devel/glib20/Makefile
+++ head/devel/glib20/Makefile
@@ -26,8 +26,8 @@
 USE_LDCONFIG=	yes
 # iconv:wchar_t - our iconv in base doesn't support utf-8 -> wchar_t (boooo)
 # (wchar_t is used by glibmm, rawtherapee triggered this)
-USES+=		gettext gmake gnome iconv:wchar_t libtool localbase pathfix perl5 \
-		pkgconfig python shebangfix
+USES+=		compiler:c11 gettext gmake gnome iconv:wchar_t libtool \
+		localbase pathfix perl5 pkgconfig python shebangfix
 USE_PYTHON=	py3kplist
 CONFIGURE_ARGS=	--disable-gtk-doc --with-html-dir=${PREFIX}/share/doc \
 		--disable-man --without-xml-catalog \
Index: head/devel/glibmm/Makefile
===================================================================
--- head/devel/glibmm/Makefile
+++ head/devel/glibmm/Makefile
@@ -22,7 +22,8 @@
 
 BUILD_DEPENDS=	gm4:devel/m4
 
-USES+=		gettext gmake libtool pathfix perl5 pkgconfig
+USES+=		compiler:c++11-lang gettext gmake libtool pathfix \
+		perl5 pkgconfig
 USE_GNOME=	glib20 libsigc++20
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
Index: head/devel/libsigc++20/Makefile
===================================================================
--- head/devel/libsigc++20/Makefile
+++ head/devel/libsigc++20/Makefile
@@ -15,7 +15,7 @@
 
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
-USES=		gmake libtool pathfix perl5 tar:xz
+USES=		compiler:c++11-lang gmake libtool pathfix perl5 tar:xz
 USE_PERL5=	build
 USE_LDCONFIG=	yes
 
Index: head/x11-toolkits/gtk30/Makefile
===================================================================
--- head/x11-toolkits/gtk30/Makefile
+++ head/x11-toolkits/gtk30/Makefile
@@ -38,7 +38,8 @@
 GNU_CONFIGURE=	yes
 USE_GNOME=	atk cairo gdkpixbuf2 introspection:build pango
 #gtk-update-icon-cache
-USES+=		gettext gmake gnome libtool localbase pathfix perl5 pkgconfig
+USES+=		compiler:c11 gettext gmake gnome libtool localbase \
+		pathfix perl5 pkgconfig
 USE_XORG=	xext xrender x11 xinerama xi xrandr xcursor xfixes xdamage \
 		xcomposite
 CONFIGURE_ARGS=	--enable-x11-backend \