Rustc not supported on OS X?

[andrewrynhard]

I have the following default.nix

with import <nixpkgs> {}; {
  rustNightlyEnv = stdenv.mkDerivation {
        name = "rust-nightly-env";

    shellHook = ''
      export PS1="rust-nightly-env > "
    '';

        buildInputs = [
      rustc
      cargo
    ];
  };
}

and when invoking nix-shell . I get

nix-shell .
error: Package ‘rustc-1.3.0’ in ‘/nix/store/vgzx25pwvfagwzadszixah6a7nwy5p0w-nixpkgs-16.03pre71191.a946805/nixpkgs/pkgs/development/compilers/rustc/generic.nix:62’ is not supported on ‘x86_64-darwin’, refusing to evaluate.
For `nixos-rebuild` you can set
  { nixpkgs.config.allowBroken = true; }
in configuration.nix to override this.
For `nix-env` you can add
  { allowBroken = true; }
to ~/.nixpkgs/config.nix.

(use ‘--show-trace’ to show detailed location information)

Is this a bug? How can I get rustc to work on OS X?

[vcunat]

Well, apparently it isn't (yet). Which doesn't mean it won't just work, but it might need some changes (I don't know).

[andrewrynhard]

After stopping by the IRC channel, the issue was found to be with LLVM. First rustc/generic.nix line 65 was modified to platforms = platforms.all;. Similarly cargo was modified. I get the following errors:

error: linking with `cc` failed: exit code: 1
note: "cc" "-m64" "-L" "/private/var/folders/5d/pqjr3mqj0gqclvqx29wxzhfr0000gn/T/nix-build-rustc-1.4.0.drv-0/rustc-1.4.0-src.tar.gz/x86_64-apple-darwin/stage0/lib/rustlib/x86_64-apple-darwin/lib" "x86_64-apple-darwin/stage0/lib/rustlib/x86_64-apple-darwin/lib/rustc_llvm-1bf6e69c.0.o" "-o" "x86_64-apple-darwin/stage0/lib/rustlib/x86_64-apple-darwin/lib/librustc_llvm-1bf6e69c.dylib" "x86_64-apple-darwin/stage0/lib/rustlib/x86_64-apple-darwin/lib/rustc_llvm-1bf6e69c.metadata.o" "-Wl,-dead_strip" "-nodefaultlibs" "-L" "/private/var/folders/5d/pqjr3mqj0gqclvqx29wxzhfr0000gn/T/nix-build-rustc-1.4.0.drv-0/rustc-1.4.0-src.tar.gz/x86_64-apple-darwin/stage0/lib/rustlib/x86_64-apple-darwin/lib" "-l" "std-1bf6e69c" "-L" "x86_64-apple-darwin/rt" "-L" "/nix/store/lzpl4l44nrcn3k1d9yl48jwhcylb71c6-llvm-3.7.0/lib" "-L" "/private/var/folders/5d/pqjr3mqj0gqclvqx29wxzhfr0000gn/T/nix-build-rustc-1.4.0.drv-0/rustc-1.4.0-src.tar.gz/x86_64-apple-darwin/stage0/lib/rustlib/x86_64-apple-darwin/lib" "-L" "/private/var/folders/5d/pqjr3mqj0gqclvqx29wxzhfr0000gn/T/nix-build-rustc-1.4.0.drv-0/rustc-1.4.0-src.tar.gz/.rust/lib/x86_64-apple-darwin" "-L" "/private/var/folders/5d/pqjr3mqj0gqclvqx29wxzhfr0000gn/T/nix-build-rustc-1.4.0.drv-0/rustc-1.4.0-src.tar.gz/lib/x86_64-apple-darwin" "-Wl,-force_load,x86_64-apple-darwin/rt/librustllvm.a" "-l" "LLVMInterpreter" "-l" "LLVMMCJIT" "-l" "LLVMExecutionEngine" "-l" "LLVMRuntimeDyld" "-l" "LLVMAsmParser" "-l" "LLVMLinker" "-l" "LLVMBitWriter" "-l" "LLVMipo" "-l" "LLVMVectorize" "-l" "LLVMPowerPCDisassembler" "-l" "LLVMPowerPCCodeGen" "-l" "LLVMPowerPCAsmParser" "-l" "LLVMPowerPCDesc" "-l" "LLVMPowerPCInfo" "-l" "LLVMPowerPCAsmPrinter" "-l" "LLVMMipsDisassembler" "-l" "LLVMMipsCodeGen" "-l" "LLVMMipsAsmParser" "-l" "LLVMMipsDesc" "-l" "LLVMMipsInfo" "-l" "LLVMMipsAsmPrinter" "-l" "LLVMAArch64Disassembler" "-l" "LLVMAArch64CodeGen" "-l" "LLVMAArch64AsmParser" "-l" "LLVMAArch64Desc" "-l" "LLVMAArch64Info" "-l" "LLVMAArch64AsmPrinter" "-l" "LLVMAArch64Utils" "-l" "LLVMARMDisassembler" "-l" "LLVMARMCodeGen" "-l" "LLVMARMAsmParser" "-l" "LLVMARMDesc" "-l" "LLVMARMInfo" "-l" "LLVMARMAsmPrinter" "-l" "LLVMX86Disassembler" "-l" "LLVMX86AsmParser" "-l" "LLVMX86CodeGen" "-l" "LLVMSelectionDAG" "-l" "LLVMAsmPrinter" "-l" "LLVMCodeGen" "-l" "LLVMTarget" "-l" "LLVMScalarOpts" "-l" "LLVMProfileData" "-l" "LLVMInstCombine" "-l" "LLVMInstrumentation" "-l" "LLVMTransformUtils" "-l" "LLVMipa" "-l" "LLVMAnalysis" "-l" "LLVMX86Desc" "-l" "LLVMObject" "-l" "LLVMMCParser" "-l" "LLVMBitReader" "-l" "LLVMMCDisassembler" "-l" "LLVMX86Info" "-l" "LLVMX86AsmPrinter" "-l" "LLVMMC" "-l" "LLVMX86Utils" "-l" "LLVMCore" "-l" "LLVMSupport" "-l" "ncurses" "-l" "pthread" "-l" "z" "-l" "m" "-l" "c++" "-l" "System" "-l" "c" "-l" "m" "-dynamiclib" "-Wl,-dylib" "-Wl,-install_name,@rpath/librustc_llvm-1bf6e69c.dylib" "-Wl,-rpath,@loader_path/" "-Wl,-rpath,/usr/local/lib/rustlib/x86_64-apple-darwin/lib" "-l" "compiler-rt"
note: ld: warning: directory not found for option '-L/private/var/folders/5d/pqjr3mqj0gqclvqx29wxzhfr0000gn/T/nix-build-rustc-1.4.0.drv-0/rustc-1.4.0-src.tar.gz/.rust/lib/x86_64-apple-darwin'
ld: warning: directory not found for option '-L/private/var/folders/5d/pqjr3mqj0gqclvqx29wxzhfr0000gn/T/nix-build-rustc-1.4.0.drv-0/rustc-1.4.0-src.tar.gz/lib/x86_64-apple-darwin'
Undefined symbols for architecture x86_64:
  "_ffi_type_double", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
  "_ffi_type_pointer", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
  "_ffi_type_sint16", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
  "_ffi_type_void", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
  "_ffi_type_sint64", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
  "_ffi_prep_cif", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
  "_ffi_type_sint32", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
  "_ffi_type_sint8", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
  "_ffi_type_float", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
  "_ffi_call", referenced from:
      llvm::Interpreter::callExternalFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) in libLLVMInterpreter.a(ExternalFunctions.cpp.o)
ld: symbol(s) not found for architecture x86_64
clang-3.6: error: linker command failed with exit code 1 (use -v to see invocation)

error: aborting due to previous error
/private/var/folders/5d/pqjr3mqj0gqclvqx29wxzhfr0000gn/T/nix-build-rustc-1.4.0.drv-0/rustc-1.4.0-src.tar.gz/mk/target.mk:164: recipe for target 'x86_64-apple-darwin/stage0/lib/rustlib/x86_64-apple-darwin/lib/stamp.rustc_llvm' failed
make: *** [x86_64-apple-darwin/stage0/lib/rustlib/x86_64-apple-darwin/lib/stamp.rustc_llvm] Error 101
make: *** Waiting for unfinished jobs....
builder for ‘/nix/store/akqi1g0783qpf18gjn463a13xc8iz4wd-rustc-1.4.0.drv’ failed with exit code 2
error: build of ‘/nix/store/akqi1g0783qpf18gjn463a13xc8iz4wd-rustc-1.4.0.drv’ failed
/Users/user/.nix-profile/bin/nix-shell: failed to build all dependencies

[pikajude]

@andrewrynhard @vcunat I have a fix for this but it's based on the sandbox-profiles branch and I'd like that to be merged in first. Just a couple changes are necessary:

• Build llvm as a shared library on Darwin. This requires NIX_LDFLAGS = "-rpath ${llvm}/lib" to be added to packages that directly link with llvm, which right now are clang and rustc.
• Allow impure dependencies on /bin/cat, /usr/lib/libedit.3.dylib, and /etc/hosts to rustc. These could all be edited out at some point but it's not worth the effort right now.

Some other non-obvious changes are required to get cargo working properly, and they'll be included in the commit that I eventually make to master (unless you want to cherry-pick my changes now, which I'm happy to make available).

[andrewrynhard]

@pikajude: I think I can wait for the merge into master. Got caught up with something else for now. Thanks for the fixes!

[andrewrynhard]

@pikajude have your changes been merged yet?

[retrry]

@andrewrynhard I created pull request here: #14870, which enables Rust Darwin compatibility. Would be good if you could test it :)