bash CR and backquotes trouble

[Larry Hall (Cygwin)]

Nicolas Roche wrote:
> Larry Hall (Cygwin) a écrit :
>> On 11/02/2006, Nicolas Roche wrote:
>>> I am using bash version:
>>> 3.1.17(9)
>>>
>>> I have tried to use shopt -s igncr but I have an issue with the 
>>> following shell construct:
>>>
>>> t=`gcc --print-multi-lib` where gcc is a mingw gcc.
>>>
>>> As my gcc is a mingw program, it outputs CR/LFs. In previous versions 
>>> bash used to ignore the CR, so t variable was not containing any CR.
>>> Now this is no more the case and this is causing some troubles 
>>
>>
>> Why isn't "t=`gcc --print-multi-lib | d2u`" not a solution here?
> 
> Well for two reasons:
> - portability. the same homemade scripts are also used among a large 
> flavors of unixes (AIX, IRIX, HP-UX, Tru64, ....). dos2unix is not 
> installed on all of them...


OK.  So 'tr' is a better choice then.


> - these constructs are appearing  in projects like GCC (I triggered the 
> error while building a mingw GCC).


Which is why I suggested doing the translation so you don't get caught.


> Is there any technical reason why igncr does not handle this case ? 
> What's the exact semantic of this option by the way ?


Dan has addressed this in his response so I won't repeat it.


-- 
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
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