On Wed, Feb 16, 2005 at 11:43:00PM +0900, Peter O'Gorman wrote:
> Brian Barrett wrote:
>
> >Could libtoolize just use 'cp -f -p' instead of 'cp -f' when copying the
> >files and leave the timestamps as they are in the original libltdl
> >directory? I admit to not understanding all the details, but that was
> >enough to clear up the problem for me (as one would expect - the
> >installed sources of libltdl should be setup correctly...). Seems much
> >easier than any of the other options.
>
> I'm just googling cp -p portability actually, on first inspection it seems
> like this is a no-brainer. I'll google some more to find out why we're
> wrong :)
>From the autoconf manual:
Commands like `cp -p' and `touch -r' typically do not copy file
timestamps to their full resolutions (*note Limitations of Usual
Tools::). Hence you should be wary of rules like this:
dest: src
cp -p src dest
as `dest' will often appear to be older than `src' after the
timestamp is truncated, and this can cause `make' to do needless
rework the next time it is invoked. To work around this problem,
you can use a timestamp file, e.g.:
dest-stamp: src
cp -p src dest
date >dest-stamp
I don't see any signs in it of `cp -p' being non-portable.
--
albert chin ([EMAIL PROTECTED])
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