Re: [PATCH 2/4] http: drop support for curl < 7.16.0

[Jeff King <peff@peff.net>]

On Wed, Aug 09, 2017 at 11:29:30PM +0200, Nicolas Morey-Chaisemartin wrote:

> > But the #ifdef above says 071700, which is 7.23.0. I wonder if we just
> > got it wrong back then (maybe hex confusion with 7.17.0?). I have a
> > build setup for old versions of curl, so I'll double-check that 7.19.4
> > builds with KEYPASSWD. And dig in the history to see if there's any
> > comment on this mismatch.
>
> It seems to be a decimal/hex issue:
> docs/libcurl/symbols-in-versions:153:CURLOPT_KEYPASSWD               7.17.0
> 
> I guess it should still work because it is now defined like this:
> curl.h:#define CURLOPT_SSLKEYPASSWD CURLOPT_KEYPASSWD
> 
> If I'm not mistaken on cpp behaviour it means CURLOPT_KEYPASSWD is
> evaluated to CURLOPT_SSLKEYPASSWD (git define) which is evaluated into
> CURLOPT_KEYPASSWD (curl define).
>
> It should stop here as CURLOPT_KEYPASSWD was not a defined macro when
> the curl one was evaluated.  It might be worth cleaning though,
> specially it wouldn't work anymore if the git macro is ever moved
> before the curl include.

Hmph. That makes me think the original should have just been using
CURLOPT_SSLKEYPASSWD through the code, if curl was providing
a backwards-compatible macro. But it won't matter either way if we just
get rid of it. :)

Thanks for digging up the curl history.

-Peff