--- a/strace-4.7.ebuild	2012-05-03 01:59:12.000000000 +0400
+++ b/strace-4.7.ebuild	2012-05-05 02:19:11.000000000 +0400
@@ -34,6 +34,7 @@
 	fi
 
 	filter-lfs-flags # configure handles this sanely
+	append-flags "-DHAVE_PROCESS_VM_READV"
 	use static && append-ldflags -static
 
 	export ac_cv_header_libaio_h=$(usex aio)