diff -ru cdecl-13.0.orig/configure cdecl-13.0/configure
--- cdecl-13.0.orig/configure	2022-10-31 01:22:38.000000000 +0100
+++ cdecl-13.0/configure	2022-11-04 20:36:34.626729430 +0100
@@ -6143,7 +6143,7 @@
   printf %s "(cached) " >&6
 else $as_nop
       # Double quotes because $CC needs to be expanded
-    for CPP in "$CC -E" "$CC -E -traditional-cpp" cpp /lib/cpp
+    for CPP in "$CC -E" "$CC -E -traditional-cpp"
     do
       ac_preproc_ok=false
 for ac_c_preproc_warn_flag in '' yes