Re: revisit: bare carriage return in status.m4 / configure

[Steven R. Loomis]

Thomas,
Sorry if I was unclear.  I am using "^M" here to represent the single 
byte with an ASCII value 0x0D / 13 decimal, carriage return.   I was not 
referring to the escape sequence "^" plus "M". 

status.m4, and thus resulting 'configure' scripts, contain that byte, 
even though all lines are terminated with 0x0A / 10 decimal, linefeed.

tr would work (or an awk builtin?  But, awk is what is being detected 
here) on ASCII-based systems.  Non-ASCII-based systems would be easy 
enough to detect, though.

-s


Thomas Dickey wrote:
> On Mon, 27 Oct 2008, Steven R. Loomis wrote:
>
> > Hello,
> > autoconf 2.63 has worked well for our project (icu), except for an 
> > issue with a bare carriage return (hereafter '^M') in status.m4 which 
> > shows up in resulting configure scripts.  The line in question is:
> >
> > ac_cr='^M'
> >
> > If I am not misreading the git repository, the current development 
> > version also has such a line.
> >
> > I found and read this discussion: 
> > http://lists.gnu.org/archive/html/autoconf-patches/2008-04/msg00007.html
> > but, most of the later discussion seemed to be about preferring \r in 
> > the output form over ^M.
>
> That might not be portable enough (one workaround would be to use "tr" 
> to construct the character from less troublesome text).