Re: Forcing complete expansion of a PATH variable

[Guido Draheim]

Raja R Harinath schrieb:
> address@hidden (Joshua Kwan) writes:
> [snip]
>
> > Now I have added AC_SUBST_DIR(musicpath) after these lines.
> >
> > But something weird happens now:
> >
> > ./configure: line 3594: musicpath: command not found
> >
> > This doesn't affect the success of configure, but I wonder why it is
> > there? I looked in configure itself and lo there it was:
> >
> >        musicpath
> >        musicpath=`(
> >            test "x$prefix" = xNONE && prefix="$ac_default_prefix"
> >            test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
> >            eval echo \""$musicpath"\"   
> >        )`
> >
> > But I've added nothing but that one AC_SUBST_DIR. I am using the m4 code
> > verbatim from the site ou have given me. Do you know what's up?
>
>
> The code at http://ac-archive.sf.net/Miscellaneous/ac_subst_dir.html
> says:
>
>     AC_DEFUN([AC_SUBST_DIR], [
>             ifelse($2, , $1, $1="[$]$2")
>             $1=`(
>                 test "x$prefix" = xNONE && prefix="$ac_default_prefix"
>                 test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
>                 eval echo \""[$]$1"\"
>             )`
>             AC_SUBST($1)
>     ])
>
> Try this instead:
>
>     AC_DEFUN([AC_SUBST_DIR], [
>             ifelse($2,,,$1="[$]$2")
>             $1=`(
>                 test "x$prefix" = xNONE && prefix="$ac_default_prefix"
>                 test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
>                 eval echo \""[$]$1"\"
>             )`
>             AC_SUBST($1)
>     ])
>
> - Hari

spot the difference :-)=) ... the whitespace in the ifelse, right?
I am modifying the macro in the ac-archive, plus sending a message
to the author given for that macro. I wonder why that was never a
problem before. Well, anyways, let's have that fixed. -- guido