- Enable the shared library build on darwin by default to match other
platforms.
- Fix the dylib file's name in the store
- Symlink a versioned name as some tooling expects this.
Refers to non-existent files; see e.g.,
https://hydra.nixos.org/build/36359717/nixlog/1/raw
Likely a copy-paste error that has gone unnoticed because paxmark didn't
do anything, but breaks after 6648b04381b8fefb704824f5db898813f22dafbb
The hashes for libc++ and libc++abi were wrong.
There was also an incompatibility with nixpkgs on darwin which is now
weakly worked around: the "os_trace" macro changed definition in the OS
X development SDK since version 10.9 as used by nixpkgs. LLVM 3.8 uses
the new version, which I am temporarily replacing with a printf on
darwin as it is only used in one minor location.
vcunat's review:
- let's not switch the default versions of llvm* for now
- the only changes I see is adding python to clang's buildInputs
and using the big so-file as discussed in #12759
(BUILD_SHARED_LIBS -> LLVM_LINK_LLVM_DYLIB)
- in future it will be nice to split libLLVM into a separate output
