flightgear: build style cmake handles -isystem

srcpkgs/flightgear/template

@@ -35,14 +35,6 @@ fi
 # Suppress warnings regarding auto_ptr
 CXXFLAGS="-Wno-deprecated-declarations"
 
-post_configure() {
-	if [ -n "$CROSS_BUILD" ]; then
-		# Remove "-isystem ${XBPS_CROSS_BASE}/usr/include" from Makefiles
-		find ${wrksrc}/build -iname flags.make -exec sed -i "{}" \
-			-e "s;-isystem ${XBPS_CROSS_BASE}/usr/include ; ;g" \;
-	fi
-}
-
 post_install() {
 	vinstall package/flightgear.desktop 644 usr/share/applications
 	vinstall package/flightgear.ico 644 usr/share/icons