--- jdk14-bc54620a3848/make/autoconf/basics.m4	2020-02-07 04:40:54.000000000 +1030
+++ jdk14-bc54620a3848-new/make/autoconf/basics.m4	2020-04-24 10:59:33.056098506 +0930
@@ -583,7 +583,7 @@
   BASIC_SETUP_TOOL($1, [AC_PATH_PROGS($1, $2, , $3)])
   if test "x[$]$1" = x; then
     AC_MSG_NOTICE([Required tool $2 not found in PATH, checking built-in])
-    if help $2 > /dev/null 2>&1; then
+    if command -v $2 > /dev/null 2>&1; then
       AC_MSG_NOTICE([Found $2 as shell built-in. Using it])
       $1="$2"
     else