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bug#29147: 27.0.50; gnutls-available-p broken

From: Eli Zaretskii
Subject: bug#29147: 27.0.50; gnutls-available-p broken
Date: Sun, 05 Nov 2017 17:29:22 +0200

> From: Robert Pluim <address@hidden>
> Date: Sun, 05 Nov 2017 11:54:57 +0100
> Cc: address@hidden, Ted Zlatanov <address@hidden>
> Juri Linkov <address@hidden> writes:
> > The Emacs GnuTLS manual says that gnutls-available-p returns t
> > if GnuTLS is available, but really it returns nil, and I don't see
> > how gnutls-available-p is supposed to return a non-nil value
> > when HAVE_GNUTLS is defined, but HAVE_GNUTLS3 is not.
> Its docstring says:
>     gnutls-available-p is a built-in function in `C source code'.
>     (gnutls-available-p)
>     Return list of capabilities if GnuTLS is available in this instance of 
> Emacs.
> I see that the info documentation says it returns t, so that needs
> fixing.

Not just the documentation, the code as well needs fixing.

> Your point about HAVE_GNUTLS3 is valid, that's true as of commit
> 583995c62dd424775dda33d5134ce04bee2ae685. Ted, was that intentional?

I cannot see how this could be intentional, because it makes it
impossible to distinguish between GnuTLS 2.x and no GnuTLS at all.  So
I fixed this on the release branch.

If Juri (or someone else) has GnuTLS 2.x, please test and close the
bug if it is indeed fixed.


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