Re: Forcing complete expansion of a PATH variable

[Andreas Schwab]

Guido Draheim <address@hidden> writes:

|> > 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?

No, the whitespace before each argument is ignored by m4.  It's rather the
$1 that is removed.

Andreas.

-- 
Andreas Schwab, SuSE Labs, address@hidden
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