当运行“货物建造"时，无法执行链接器"cc"错误. [英] Could not exec the linker `cc` error when running "cargo build"

问题描述

我刚刚在Mac上安装了Rust，并且显示了rustc --version --verbose

I just installed Rust on my Mac and rustc --version --verbose displays

rustc 1.0.0-nightly (91bdf23f5 2015-03-09) (built 2015-03-08)
binary: rustc
commit-hash: 91bdf23f504f79ed59617cde3dfebd3d5e39a476
commit-date: 2015-03-09
build-date: 2015-03-08
host: x86_64-apple-darwin
release: 1.0.0-nightly

我克隆了几个存储库( postgres-extension 和

I cloned a couple of repositories (postgres-extension and erlang-rust-nif) and ran cargo build upon both of them. Both reported the error

error: could not exec the linker `cc`: No such file or directory (os error 2)
error: aborting due to previous error

此外，我无法使用rustc编译简单的Rust文件打印"hello world".我只能通过传递标志rustc -C linker=gcc hello_world.rs来编译它们.

Additionally, I wasn't able to compile a simple Rust file printing "hello world" using rustc. I was only able to compile them by passing the flags rustc -C linker=gcc hello_world.rs.

clang --version显示

clang version 3.4.2  (http://llvm.org/git/llvm.git 5c6aa738fb3325ae499454877f1e2926d2368135)
Target: x86_64-apple-darwin12.2.1
Thread model: posix

gcc --version显示

gcc (Homebrew gcc49 4.9.2_1) 4.9.2

推荐答案

似乎您已经通过Homebrew安装了GCC和LLVM/clang.查看共享的macOS配置，链接器默认为cc.我已经安装了macOS开发人员工具:

It looks like you have installed GCC and LLVM/clang via Homebrew. Checking out the shared macOS configurations, the linker defaults to cc. I have installed the macOS developer tools:

$ clang --version
Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin13.4.0
Thread model: posix

$ gcc --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin13.4.0
Thread model: posix

$ cc --version
Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin13.4.0
Thread model: posix

这可能是Rust本身可以解决的问题，但是您必须提交错误报告/增强功能请求.您可能可以通过将clang符号链接为cc而不是仅对其进行别名来解决此问题，因为在Rust调用其的环境中可能不存在别名.

This is potentially something that Rust itself could fix, but you'd have to file a bug report / enhancement request. It's possible that you might be able to work around this by symlinking clang as cc, instead of just aliasing it, as aliases probably don't exist in the environment that Rust is calling out from.

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