+dnl CF_WITH_PATH_PROG version: 1 updated: 2019/06/30 19:44:43
+dnl -----------------
+dnl Check for a given program, like CF_PATH_PROG, but allow override using a
+dnl "--with-xxx" option.
+dnl
+dnl Parameters:
+dnl $1 = environment variable to set/update
+dnl $2 = program name
+dnl $3 = help-text
+dnl $4 = $PATH
+AC_DEFUN([CF_WITH_PATH_PROG],[
+AC_ARG_WITH($2-path,
+ [ --with-$2-path=XXX specify path of $2 ifelse($3,,,$3)],
+ [AC_MSG_CHECKING(for $2 program ifelse($3,,,$3))
+ $1=$withval
+ AC_MSG_RESULT([$]$1)
+ CF_PATH_SYNTAX($1)
+ ],
+ [CF_PATH_PROG($1,$2,,ifelse($4,,,$4))
+ if test -z "[$]$1"
+ then
+ AC_MSG_WARN(no $2 program found ifelse($3,,,$3))
+ fi
+ ])
+])
+dnl ---------------------------------------------------------------------------