llvmPackages_11: 11.0.0rc5 -> 11.0.0 and various fixes/improvements:
- llvmPackages_11 now compiles on Darwin
- libcxx now compiles on Linux
- Ported #91293 to 11.0.0
- Try to anticipate #100388
compiler-rt (and as a result clang) can't be build for i686 (as noticed here: #99984).
The patch adds the required variables and should result in the same behavior as in the nixpkgs-llvm10. It essentially forces to use i386 buildins when using i486, i586 or i686, which are not supported.
Fixes#100392
A port of #85925 for LLVM 11 to enable CFI for Chromium.
This is required for features such as `-fsanitize=cfi` that (by default)
load the file `…/resource-root/share/cfi_blacklist.txt`.
This is used by mesa.drivers (still on LLVM 9) as a cache key. I've
ported that change to LLVM 11 to test it and so that it doesn't get lost
in future versions. Credit for the change goes to David McFarland.
See #93946 for details.
Co-Authored-By: David McFarland <corngood@gmail.com>
