Re: RFC: Adding a check to the top level configure script for a binary-mounted cygwin-hosted build directory

[Eric Blake <ebb9 at byu dot net>]

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According to Corinna Vinschen on 5/25/2007 3:47 AM:
>> IMHO the bug is that cygwin's bash isn't dealing with `` line endings
>> properly.  It's the responsibility of the shell to strip trailing line
>> endings (1003.2-1992 3.6.3, although it doesn't mention
>> platform-specific line endings) during command substitution.
>>
>> Also, cygwin's bash should allow CR/LF pairs as word delimiters during
>> splitting, if it doesn't already.  Cygwin supports mixed mounts, it
>> needs to deal with the ramifications itself.
> 
> Does that actually happen with the latest bash?  It should work fine
> on textmode mounts.

Currently, the only way to get cygwin to ignore \r inside `` pairs
(regardless of text or binary mount, since the text from `` is not coming
from the file system, but from a pipe) is to use the cygwin-specific igncr
shopt, or to add \r to IFS if the expansion of `` is subject to field
splitting.  This is because with a cygwin-hosted build directory, the
default platform line ending is \n, not \r\n, for compatibility with
Linux.  But ignoring \r is pretty easy; perhaps all that is needed is a
prep step in the cygwin-hosted build that does '(set -o igncr) 2>/dev/null
&& set -o igncr' before calling any djgpp processes inside ``.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9@byu.net
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