Re: recent changes in libtool-2-0 branch cause a m4 loop

[Christoph Egger]

> Sorry for the self-replies.
> 
> * Ralf Wildenhues wrote on Sun, Jun 12, 2005 at 01:36:43PM CEST:
> > > * Christoph Egger wrote on Sun, Jun 12, 2005 at 01:16:32PM CEST:
> > > > 
> > > > Recent changes in the libtool-2-0 branch causes an
> > > > infinite m4 loop.
> *snip*
> > Argh.  Now I understand:  it works with CVS Autoconf, but it breaks
> > with 2.59.  D*mn.  :(
> 
> Quick hack: define our own (fixed) versions of m4_car and m4_cdr, so we
> are independent of the Autoconf version used.
> 
> Does anybody know a better solution?

This patch works with autoconf 2.59.


> Regards,
> Ralf
> 
> Index: m4/ltsugar.m4
> ===================================================================
> RCS file: /cvsroot/libtool/libtool/m4/ltsugar.m4,v
> retrieving revision 1.2.2.2
> diff -u -r1.2.2.2 ltsugar.m4
> --- m4/ltsugar.m4     11 Jun 2005 11:12:28 -0000      1.2.2.2
> +++ m4/ltsugar.m4     12 Jun 2005 11:59:02 -0000
> @@ -32,6 +32,19 @@
>  ])
>  
>  
> +# lt_car(LIST)
> +# lt_cdr(LIST)
> +# ------------
> +# Manipulate m4 lists.
> +# These macros are necessary as long as will still need to support
> +# Autoconf-2.59 which quotes differently.
> +m4_define([lt_car], [[$1]])
> +m4_define([lt_cdr],
> +[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
> +       [$#], 1, [],
> +       [m4_dquote(m4_shift($@))])])
> +
> +
>  # lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
>  # ----------------------------------------------------------
>  # Produce a SEP delimited list of all paired combinations of elements of
> @@ -40,8 +53,8 @@
>  m4_define([lt_combine],
>  [m4_if([$2], [], [],
>         [lt_join(m4_quote(m4_default([$1], [, ])),
> -             _$0([$1], m4_car($2)[$3], m4_shiftn(3, $@)),
> -             $0([$1], m4_cdr($2), m4_shiftn(2, $@)))])])
> +             _$0([$1], lt_car($2)[$3], m4_shiftn(3, $@)),
> +             $0([$1], lt_cdr($2), m4_shiftn(2, $@)))])])
>  m4_define([_lt_combine],
>  [m4_if([$3], [], [],
>         [lt_join(m4_quote(m4_default([$1], [, ])),
> 

-- 
Greetings,

Christoph

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