diff --git a/base/gcc/gcc.conf b/base/gcc/gcc.conf
index 839b803cd..3fb8a2cf9 100644
--- a/base/gcc/gcc.conf
+++ b/base/gcc/gcc.conf
@@ -206,13 +206,11 @@ else
 	var_append confopt " " "--with-gnu-ld"
 	var_append confopt " " "--enable-threads=posix"
 	var_append confopt " " "--enable-libmpx"
-	var_append confopt " " "--with-system-zlib"
 	var_append confopt " " "--with-isl"
 	var_append confopt " " "--disable-libunwind-exceptions"
 	var_append confopt " " "--enable-clocale=gnu"
 	var_append confopt " " "--disable-libstdcxx-pch"
 	var_append confopt " " "--disable-libssp"
-	var_append confopt " " "--enable-install-libiberty"
 	var_append confopt " " "--with-linker-hash-style=gnu"
 	var_append confopt " " "--enable-gnu-indirect-function"
 	var_append confopt " " "--disable-werror"