--- a/qt4-build-multilib.eclass	2016-07-08 00:35:23.000000000 +0300
+++ b/qt4-build-multilib.eclass	2016-08-02 15:45:04.000000000 +0300
@@ -188,6 +188,15 @@ qt4-build-multilib_src_prepare() {
 		fi
 	fi
 
+	if use_if_iuse exceptions && use_if_iuse abi_x86_32 && use_if_iuse abi_x86_64 && ! use_if_iuse debug; then
+		# Bug 546746
+		# default x86_32 abi can not use -msse* without aligning on Intel
+		# with some options like -ftree-vectorize, etc.
+		# This solution violate SysV ABI standard and not popular in Linux world.
+		# Apply only on amd64 + multilib.
+		append-flags -mstackrealign
+	fi
+
 	# Bug 261632
 	if use ppc64; then
 		append-flags -mminimal-toc