为什么Homebrew报告“无法理解kern.osversion‘14.0.0’”?

当我跑步时 brew -- config 我明白了

HOMEBREW_VERSION: 0.9.5
ORIGIN: https://github.com/Homebrew/homebrew
HEAD: bc071fb5448628aea8f066bbc0f37b0ecb4f11ee
Last commit: 16 hours ago
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
CPU: quad-core 64-bit haswell
OS X: 10.10.1-x86_64
Xcode: 6.1.1
CLT: 6.1.1.0.1.1416017670
couldn't understand kern.osversion `14.0.0'
GCC-4.2: build 5666
Clang: 6.0 build 600
X11: 2.7.7 => /opt/X11
System Ruby: 2.0.0-p481
Perl: /usr/bin/perl
Python: /usr/local/bin/python => /usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/bin/python2.7
Ruby: /usr/bin/ruby

尽管我的Xcode(在Yosemite上)命令行工具似乎是最新的 xcode-select --install )在正确的地方

/Applications/Xcode.app/Contents/Developer 

根据 xcode-select -print-path ,我的(仅) gcc 是

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-darwin14.0.0
Thread model: posix

根据 brew doctor 是

Unexpected static libraries:
    /usr/local/lib/libtclstub8.6.a
    /usr/local/lib/libtkstub8.6.a

然而,我身边有一些可疑的东西,特别是 usr/bin/gcc-4.2 ,其中 --version 给予

couldn't understand kern.osversion `14.0.0'
i686-apple-darwin11-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)
...

和 /usr/bin/i686-apple-darwin11-gcc-4.2.1 ,其中 --版本 也给出了

couldn't understand kern.osversion `14.0.0'
i686-apple-darwin11-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)    
...

什么是 brew--配置 的报告

无法理解kern.osversion“14.0.0”

意思是我该做些什么吗?