--- qt4-build.old	2010-11-21 17:57:12.000000000 +0300
+++ qt4-build.eclass	2010-11-21 18:26:09.000000000 +0300
@@ -338,6 +338,14 @@
 	if version_is_at_least 4.7.1; then
 		myconf+=" -no-sse4.1 -no-sse4.2"
 	fi
+	
+	# Disable MMX, 3DNOW, all SSE, and AVX for PPC
+	if [[ ${CHOST} == powerpc* ]] ; then
+		myconf+=" -no-mmx -no-3dnow -no-sse -no-sse2"
+		if version_is_at_least 4.7.1; then
+			myconf+=" -no-sse3 -no-ssse3 -no-sse4.1 -no-sse4.2 -no-avx"
+		fi
+	fi
 
 	echo ./configure ${myconf}
 	./configure ${myconf} || die "./configure failed"