Few patches from Ravenports for DragonFly BSD support

[Leonid Bobrov]

On Thu, Jan 24, 2019 at 12:53:28PM +0200, Pekka Paalanen wrote:
> Hi,
> 
> you need to split this into logical patches, each patch doing one
> logical thing. It is not the same as one patch per file. Each patch
> needs to have a commit message explaining why the patch was written,
> and so on. Please, see
> https://gitlab.freedesktop.org/wayland/wayland/blob/master/CONTRIBUTING.md
> 

Ok.

> As for merging, I think I saw some bits that don't actually need any
> #ifdef BSD guards but would be good fixes regardless of the OS. Patches
> that do not depend on a specific OS I think we can land without having
> a BSD in CI, but patches that depend on being built on a BSD should
> come with CI. I won't personally have the time to figure out how to run
> a BSD in Gitlab CI, someone else needs to write the patch.
> 
> It would also be good to instead of hardcoding things like
> #if Dragonfly /* no mremap */ to have autoconf test for the existence of
> mremap, since the fallback to munmap+mmap seems quite generic.
> 

Ok, I'll resend after Gitlab CI will be set up.

Meanwhile I'll make sure this patch gets to Ravenports:
https://github.com/mazocomp/openbsd-wip/blob/master/graphics/wayland/patches/patch-src_wayland-shm_c#L43

> 
> Thanks,
> pq