On Fri, Nov 04, 2016 at 08:49:59PM +0000, Pedro F. Giffuni wrote:
> Author: pfg
> Date: Fri Nov 4 20:49:59 2016
> New Revision: 308314
> URL: https://svnweb.freebsd.org/changeset/base/308314
>
> Log:
> sed(1): add LEGACY_BSDSED_COMPAT compile-time flag.
>
> In r297602, which included a __FreeBSD_version bump to 1100105, we changed
> sed 'i' and 'a' from discarding whitespaces to conform with what GNU and
> sysvish sed do.
>
> There are arguments in favor of keeping the old behavior but the new
> behavior is also useful for migration purposes. It seems important to at
> least consider the case of developers depending on the previous behavior,
> so add a CFLAG to enable the old behaviour.
If such legacy behavior appears to be useful or even important for
real-world scenarios, I think that an environment variable controlling
it is more practical and traditional than the recompilation.
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