According to the qwtpolar website qwtpolar-1.0.0 depends on qwt-6.*, not qwt-5.* as stated in the ebuild. It does not compile with qwt-5.* -RDEPEND="x11-libs/qwt:5[svg]" +RDEPEND="x11-libs/qwt:6[svg]"
+ 23 Dec 2011; Justin Lecher <jlec@gentoo.org> qwtpolar-1.0.0.ebuild: + Correct slot for qwt 5 -> 6, #395737 +