Re: what is $ac_t ?

[Sam Steingold]

On Fri, Sep 17, 2010 at 12:36 PM, Eric Blake <address@hidden> wrote:
>
> Really, anyone with $ac_t in their script should modernize, and use ECHO_T
> instead.

http://clisp.cvs.sourceforge.net/viewvc/clisp/clisp/src/m4/proto.m4

I think I will just drop it altogether:

@@ -16,8 +16,7 @@ AC_DEFUN([CL_PROTO],
 AC_CACHE_VAL(cl_cv_proto_[$1], [$2
 cl_cv_proto_$1="$3"])
 cl_cv_proto_$1=`echo "[$]cl_cv_proto_$1" | tr -s ' ' | sed -e 's/( /(/'`
-AC_MSG_RESULT([$]{ac_t:-
-         }[$]cl_cv_proto_$1)
+AC_MSG_RESULT([$]cl_cv_proto_$1)
 ])

 dnl CL_PROTO_RET(INCLUDES, DECL, CACHE-ID, TYPE-IF-OK, TYPE-IF-FAILS)

>> 2. required: is there a replacement for ac_t or should it be dropped?
>
> Yes, we can avoid using $ac_t for our temporary variable name, to respect
> the fact that there are some _really_ old scripts that are exploiting
> formerly undocumented internals that no longer exist. Although those
> configure.in should be modernized, we can at least make their output look
> prettier with a simple change to avoid the problematic name.

I suggest that you set ac_t to something like "fix your configure.ac:
ac_t is obsolete, use ECHO_T instead".

-- 
Sam Steingold <http://sds.podval.org>