--- mesa-10.1.0.ebuild.orig	2014-03-14 03:31:22.000000000 +0400
+++ mesa-10.1.0.ebuild	2014-04-16 19:31:15.288604631 +0400
@@ -49,9 +49,9 @@
 done
 
 IUSE="${IUSE_VIDEO_CARDS}
-	bindist +classic debug +dri3 +egl +gallium gbm gles1 gles2 +llvm +nptl
-	+llvm-shared-libs opencl openvg osmesa pax_kernel pic
-	r600-llvm-compiler selinux vdpau wayland xvmc xa kernel_FreeBSD"
+	bindist +classic debug +dri3 +egl +gallium gbm gles1 gles2 +llvm
+	+llvm-shared-libs +nptl opencl openvg osmesa pax_kernel pic
+	r600-llvm-compiler selinux sse4_1 vdpau wayland xvmc xa kernel_FreeBSD"
 
 REQUIRED_USE="
 	llvm?   ( gallium )
@@ -210,6 +210,9 @@
 	# relax the requirement that r300 must have llvm, bug 380303
 	epatch "${FILESDIR}"/${PN}-9.2-dont-require-llvm-for-r300.patch
 
+	# do not force sse41 just because compiler supports this flag
+	epatch "${FILESDIR}"/${P}-sse41.patch
+
 	# fix for hardened pax_kernel, bug 240956
 	[[ ${PV} != 9999* ]] && epatch "${FILESDIR}"/glx_ro_text_segm.patch
 
@@ -322,6 +325,7 @@
 		$(use_enable nptl glx-tls) \
 		$(use_enable osmesa) \
 		$(use_enable !pic asm) \
+		$(use_enable sse4_1) \
 		$(use_with llvm-shared-libs) \
 		--with-dri-drivers=${DRI_DRIVERS} \
 		--with-gallium-drivers=${GALLIUM_DRIVERS} \