[Development] LLVM and Qt

[Morten Sørvig]

> On 30 Jul 2018, at 06:00, Thiago Macieira <thiago.macieira at intel.com> wrote:
> 
> On Sunday, 29 July 2018 13:36:43 PDT Lisandro Damián Nicanor Pérez Meyer 
> wrote:
>> It would also be pretty nice to know if there is a policy with respect the
>> llvm supported version. As they do not keep ABI compatibility distros
>> normally are forced to ship from two to three versions. As I understand the
>> idea in Debian testing/unstable is to have the latest two always available,
>> sometimes three of them. That already created some issues for us with Qt
>> Creator, as at some point it required a version which was about to be
>> removed.
> 
> Same policy for third-party libraries: we work with the latest, unless that 
> release happened too late in our own release cycle.
> 
> But where do we get LLVM from on a Mac? Is it from Apple? If so, we may need 
> to keep things working with an old, patched version, in addition to the 
> latest. Or we require an upgrade with Homebrew.

For dev/5.12 we’re going to default to LLVM from homebrew if LLVM_INSTALL_DIR
is not set.

The Xcode toolchain does actually contain a libclang.dylib, but as far as I can
see llvm-config and the clang-c/Index.h header are not included, which means we
can’t use it for qdoc.

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