Re: Fix LT_WITH_LTDL: AU_ALIAS bug

[Stepan Kasal]

Hello,

On Sat, Sep 10, 2005 at 04:17:52PM +0100, Gary V. Vaughan wrote:
> :-(  Can you document in HACKING that because of our use of AU_ALIAS to
> maintain backwards compatibility with earlier libtool interfaces we must
> not use $# in m4.

actually, I'd prefer if you could put it this way:

The Autoconf manual says that giving an empty parameter is equivalent
to not giving it at all.
(In particular, the Autoconf manual doesn't explain that
"FOO()" is calling macro FOO with one empty parameter.)
To prevent misunderstanding, we should use m4_ifval to check whether
a parameter is empty, and not $# to check for the number of parameters.

[ put in public domain, in case you want to paste it somewhere ;-) ]

Have a nice day,
        Stepan