Leaving it on would require us to use HAVE_PTHREAD_WORKQUEUE_QOS.
This fixes some crashes in LLDB. It still doesn't work 100% as it does on master, but at least it doesn't crash unexpectedly now.
Don't know what happened before; I had to enable pthread QoS to get it to build. Now, it works just fine with it disabled. It makes zero sense. I'm pretty sure I didn't change anything that should affect that. Whatever, I'll take the win.
In other news, I also fixed the build (failing with undefined symbols) by adding src/shims/yield.c and disabling an Objective-C class conditionally (that conditional really should be in the upstream sources as well, but it's not)
Note: this *builds* but I'm not sure if it *runs*. Especially because of I had to enable a feature that was previously disabled in order to make it compile: kevent QoS.
P.S. to Apple: Would you mind making sure your code compiles for each "supported" configuration? Or otherwise just remove them entirely? Thanks.
There was an issue where a symbol that was created as an alias was
present in the final dylib but not the first pass dylib. Some
inspection of the circular library function found that the issue is
those flags were not having an effect on the first pass dylib
because they should be passed in as a parameter of the function.
