[PATCH v2 2/2] Add pseudo-compatibility with gmime 2.6

[Thomas Jost]

On Tue, 17 Jan 2012 14:48:34 +0200, Tomi Ollila <tomi.ollila at iki.fi> wrote:
> On Tue, 17 Jan 2012 11:50:53 +0100, Thomas Jost <schnouki at schnouki.net> wrote:
> > There are lots of API changes in gmime 2.6 crypto handling. By adding
> > preprocessor directives, it is however possible to add gmime 2.6 compatibility
> > while preserving compatibility with gmime 2.4 too.
> > 
> > This is mostly based on id:"8762i8hrb9.fsf at bookbinder.fernseed.info".
> > 
> > This was tested against both gmime 2.6.4 and 2.4.31. With gmime 2.4.31, the
> > crypto tests all work fine (as expected). With gmime 2.6.4, one crypto test
> > fails (signature verification with signer key unavailable) but this will be hard
> > to fix since the new API does not report the reason why a signature verification
> > fails (other than the human-readable error message).
> > ---
> 
> LGTM. Some whitespace things but most of those were there already;
> I'd have one uncrustify round to be applied to the source and after
> that be more strict about those...

Thanks! I'll fix the whitespace issues in these patches when the source
in Git is uncrustified then.

> actually gmime 2.4 has GMIME_CHECK_VERSION defined as
> g_mime_check_version (major, minor, micro) so the comment about it
> is not entirely accurate (it is unusable in our context, though)

Oops, yes. What I really meant is that GMIME_MAJOR_VERSION is not
available as a preprocessor constant in 2.4, and GMIME_CHECK_VERSION is
unusable in our context since it just calls a runtime function.

By the way, how do you guys feel about setting GMIME_26 in
notmuch-client.h? Is that good enough, or should it be done in configure
so that gcc is called with "-DGMIME_26"?

I filed a bug about gmime 2.6 incorrect handling of signatures with
missing public keys: https://bugzilla.gnome.org/show_bug.cgi?id=668085.
A patch is attached there, feel free to test and comment.

(Arch Linux users: I made a little PKGBUILD that includes this patch if
you want to build your own gmime 2.6.4:
http://fichiers.schnouki.net/tmp/gmime-2.6.4-1.src.tar.gz)

Best regards,

-- 
Thomas/Schnouki
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