llvm-config is a tool to output compile and linker flags, when compiling against llvm.
The tool however outputs static library names despite libllvm is build
as shared library on nixos. This was fixed for llvm 3.4, 3.5 and 3.7.
For llvm 3.8 and 3.9 it printed the library extension twice (.so.so).
This was fixed in 4.0 and the patch is backported to 3.8 and 3.9 in
this pull request.
```
$ for i in 34 35 37 38 39; do echo "\nllvm-$i"; nix-shell -p llvmPackages_$i.llvm --run 'llvm-config --libnames'; done
llvm-34
libLLVMInstrumentation.so libLLVMIRReader.so libLLVMAsmParser.so
...
llvm-35
libLLVMLTO.so libLLVMObjCARCOpts.so libLLVMLinker.so libLLVMipo.so
...
llvm-37
libLLVMLTO.so libLLVMObjCARCOpts.so libLLVMLinker.so libLLVMBitWriter.so
...
llvm-38
libLLVM-3.8.1.so
llvm-39
libLLVM-3.9.so
```
fixes#26713
* All projects are available under NCSA license,
other than dragonegg.
* "Runtime" projects are dual-licensed under
both NCSA and MIT:
libc++, libc++abi, compiler-rt
* I don't mention MIT for compiler-rt as
we only build it as part of LLVM.
- mark llvm34 as broken on darwin (so it doesn't install by default with nix-env)
- don't use our gcc for llvm_34 (might fix the build)
- switch also clang default to 3.3 on darwin (llvm was before)
Now most packages in the llvm suite are built as separate derivations.
The exceptions are:
* compiler-rt must currently be built with llvm. This increases llvm's
size by 6 MB
* clang-tools-extra must be built with clang
In addition, the top-level llvm attribute is defaulted to llvm 3.4, and
llvm 3.3 must be accessed by the llvm_33 attribute. This is to make the
out-of-date packages obvious in the hope that eventually all will be
updated to work with 3.4 and 3.3 can be removed. I think we should keep
this policy in the future (latest llvm gets top-level name, the rest are
versioned until they can be removed).
The llvm packages (except libc++, which exception I will try to remove
on the next update) can all be accessed via the llvmPackages attribute,
and there are also aliases for the packages that already existed (llvm,
clang, and dragonegg).
Signed-off-by: Shea Levy <shea@shealevy.com>
