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Re: 02-lineno.patch

From: Raja R Harinath
Subject: Re: 02-lineno.patch
Date: Thu, 27 Sep 2001 12:20:22 -0500
User-agent: Gnus/5.090004 (Oort Gnus v0.04) Emacs/21.0.105


Akim Demaille <address@hidden> writes:

> | Well one other case this matters is in the computation of $srcdir.
> | configure supports the --srcdir option and also uses `dirname $0`.
> | The only issue is whether --srcdir was meant to support 'configure'
> | invocation from $PATH.
> Ah, I missed that, thanks!  Hm... Which means the test suite will soon
> fail for someone, as it does exercise this, but my host is too good to
> see that.

The bash man page says: 

  ...  If LINENO is unset, it loses its special properties, even if it
  is sub­sequently reset.

So, maybe one of the testcases should 'unset LINENO' early on, so that
you could test the no-$LINENO case.

> | > Raja> You also need to capture the directory of the original
> | > Raja> 'configure' call so that you can figure out $srcdir from it.
> Thanks for pointing this out!  I don't know how to handle this
> properly though...  Maybe we should pass something like
>         exec AS_ORIGINAL_INVOCATION_NAME=$0 $as_me.lineno
> what do you think about that?  It should be configure-independent, as
> it is M4sh code, not dedicated to Autoconf.

Yep.  That seems the only option.  We can't assume the script has a
--srcdir option.  

It would be nice if autoconf/general.m4 didn't have to compute $srcdir
on it's own.  Maybe m4sh should prove $as_mydir (== `dirname $0`) in
parallel to $as_me (== `basename $0`) and autoconf/general.m4 just

  if test -z "$srcdir"; then

Then, AS_ORIGINAL_INVOCATION_NAME would be internal to m4sh.

- Hari
Raja R Harinath ------------------------------ address@hidden
"When all else fails, read the instructions."      -- Cahn's Axiom
"Our policy is, when in doubt, do the right thing."   -- Roy L Ash

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