...I'm pondering a change that would make that a hard requirement, and from the
comment in configure.ac it looks like only old Clang < 3.4 were affected.

Change-Id: I8ef64f759fed1a45d88f94d0e8a60839ad10b263
Reviewed-on: https://gerrit.libreoffice.org/32029Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Stephan Bergmann <sbergman@redhat.com>