--- gcc/libgo/configure.ac
+++ gcc/libgo/configure.ac
@@ -47,7 +47,7 @@ AC_SUBST(CC_FOR_BUILD)
 
 AC_PROG_AWK
 
-WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
+WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wno-error=unused-result'
 AC_SUBST(WARN_FLAGS)
 
 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],