Re: zsh and autoconf-2.50

[Clint Adams]

> So yes, define and undefine are undefined (in M4sh and M4sugar), but
> no, you should not know about this (in Autoconf), you should not be
> aware of it.
> 
> What happens?

% autoconf2.50
configure.in:55: error: undefine: undefined: zsh-debug
configure.in:55: the top level

The offending construct is here.

undefine([zsh-debug])dnl
AC_ARG_ENABLE(zsh-debug,
[  --enable-zsh-debug         compile with debug code and debugger symbols],
[if test x$enableval = xyes; then
  AC_DEFINE(DEBUG)
fi])