Re: diff-apply-hunk broken

[Paul Eggert]

At 02 Apr 2004 20:48:04 -0500, Stefan Monnier <address@hidden> writes:

>>> Is --label accepted by all known non-ancient diff implementations?
>> Yes.  --label has been supported ever since diffutils 2.0, released in
>> 1992.  These days it's safe to assume --label, if it's GNU diff.
>
> I can't assume GNU diff.  So how about other system's `diff'?

Some "diff" implementations lack -L, so portable applications cannot
use "diff -L".  For example, Solaris 9 "diff" lacks -L.  -L is not
standardized by POSIX.

I recall that this is not a problem with GNU Emacs, as it tests
whether diff supports -L (or --label) before using that option.