Ye olde Apple mktemp

[Ralph Seichter]

* Ralph Seichter:

> The following local patch solves the issue for me [...]

Well, it does solve the mktemp call failing due to a missing
parameter. There is however additional fun [1] to be had once mktemp
succeeds:

-----snip-----
Checking for GMime session key extraction support... gpg: can't connect to the agent: File name too long
gpg: error getting the KEK: No agent running
gpg: error reading '[stdin]': No agent running
gpg: import from '[stdin]' failed: No agent running
No.
*** Error: Could not extract session keys from encrypted message.

This is likely due to your GMime having been built against a old
version of GPGME.

Please try to rebuild your version of GMime against a more recent
version of GPGME (at least GPGME 1.8.0).
Your current GPGME development version is: 1.13.0-unknown
-----snip-----

I found a GNUPGHOME length limit mentioned in a Debian bug [2] and other
places; looks like the Notmuch build is running into that limit. That
configure does not regcognize GPGME 1.13.0 is of course only a minor
issue, but the GnuPG error breaks the build.

-Ralph

[1] https://build.macports.org/builders/ports-10.10_x86_64-builder/builds/88616/steps/install-port/logs/stdio
[2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=847206