Re: tr portability

[Bruno Haible]

Simon Josefsson wrote:
> This is unrelated, but alas I've not found a more portable way to trim
> CR than this since some tr do not support \r:
> 
> if echo solaris | tr -d '\r' | grep solais > /dev/null; then
>   cr='\015'
> else
>   cr='\r'
> fi
> # normalize output
> LC_ALL=C tr -d "$cr" < $TMPFILE > x$TMPFILE

We are only talking about /usr/ucb/tr on Solaris 10:

$ echo solaris | /usr/xpg4/bin/tr -d '\r'                                       
                                                        
solaris
$ echo solaris | /usr/xpg6/bin/tr -d '\r'                                       
                                                        
solaris
$ echo solaris | /usr/bin/tr -d '\r'                                            
                                                        
solaris
$ echo solaris | /usr/5bin/tr -d '\r'                                           
                                                        
solaris
$ echo solaris | /usr/ucb/tr -d '\r'                                            
                                                        
solais

Since we are already stating in the generic INSTALL file, since 2008:

     On Solaris, don't put '/usr/ucb' early in your 'PATH'.  This
  directory contains several dysfunctional programs; working variants of
  these programs are available in '/usr/bin'.  So, if you need '/usr/ucb'
  in your 'PATH', put it _after_ '/usr/bin'.

your precautions above are coping with a situation that is unsupported
anyway.

In GNU gettext, many tests use "tr -d '\r'" since 2007 already, and no one
ever has reported a problem with it.

Bruno