rust - 当从 Xcode 8 内部运行时，由于信号 10， cargo 无法与 `cc` 链接

Question

我在 Xcode 8 中的 macOS 应用程序中运行 cargo 时遇到了一个奇怪的错误:

Eonil$ cargo clean
[~/Temp/repotest1/ag] (master)
Eonil$ cargo build
   Compiling ag v0.1.0 (file:///Users/Eonil/Temp/repotest1/ag)
error: linking with `cc` failed: signal: 10
  |
  = note: "cc" "-m64" "-L" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib" "/Users/Eonil/Temp/repotest1/ag/target/debug/ag.0.o" "-o" "/Users/Eonil/Temp/repotest1/ag/target/debug/ag" "-Wl,-dead_strip" "-nodefaultlibs" "-L" "/Users/Eonil/Temp/repotest1/ag/target/debug/deps" "-L" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libstd-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libpanic_unwind-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libunwind-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/librand-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcollections-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/librustc_unicode-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/liballoc-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/liballoc_jemalloc-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/liblibc-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcore-f5a209a9.rlib" "/Users/Eonil/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcompiler_builtins-f5a209a9.rlib" "-l" "System" "-l" "pthread" "-l" "c" "-l" "m"
  = note: 

error: aborting due to previous error

error: Could not compile `ag`.

To learn more, run the command again with --verbose.

为什么会出现此错误以及如何解决此问题？

• cargo 0.15.0-nightly (298a012 2016-12-20)
• rustc 1.14.0 (e8a012324 2016-12-16)

Answer 1

环境变量 MallocNanoZone 设置为 1。将其删除或将其设置为 0，问题就会神奇地消失。

我不知道为什么会这样。在我的例子中，错误是在使用 NSTask 在 Xcode 调试上下文中运行 cargo 时发生的。 Xcode自动设置MallocNanoZone=1，改变了一些对cargo执行不友好的内存管理行为。