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Re: Issue with AS_TR_CPP, m4_cr_all and EBCDIC codeset

From: Eric Blake
Subject: Re: Issue with AS_TR_CPP, m4_cr_all and EBCDIC codeset
Date: Wed, 07 Apr 2010 06:55:00 -0600
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On 04/06/2010 11:02 PM, Ralf Wildenhues wrote:
> Hello,
> * Eric Blake wrote on Sat, Apr 03, 2010 at 01:32:45AM CEST:
>> +    Fix m4_cr_all for EBCDIC.
>> +    * lib/m4sugar/m4sugar.m4 (m4_cr_all): Swap * and $, so that we
>> +    don't end up with $* in EBCDIC.
>> +    Reported by Steve Goetze.
> thanks for working on this!
>>  m4_define([m4_cr_all],
>>  m4_translit(m4_dquote(m4_format(m4_dquote(m4_for(
>> -  ,1,255,,[[%c]]))m4_for([i],1,255,,[,i]))), [-])-)
>> +  ,1,255,,[[%c]]))m4_for([i],1,255,,[,i]))), [$*-], [*$])-)
> Reading the patch, I wonder why the $* in the second argument to
> m4_translit does not ever get expanded to something undesirable?

Because it is at the top level.  That is, we are NOT inside any
m4_define/AC_DEFUN, but this is being parsed immediately by m4.  $* only
expands into arguments when you are expanding a defined macro that has

Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library

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