diff --git a/gcc/config/convex/x-convex b/gcc/config/convex/x-convex
new file mode 100644
index 0000000000000000000000000000000000000000..bc8b8b465004299c3be9d9379407a4c4a042edce
--- /dev/null
+++ b/gcc/config/convex/x-convex
@@ -0,0 +1,3 @@
+# Use -pcc to avoid surprises.
+
+CC = cc -pcc