rvm reinstall 1.9.2 - OSX 10.10 Error

1.9.2 osx 10.10 error

rvm reinstall 1.9.2                                                                        *[wgs_ui][ruby-2.1.2] 
Checking requirements for osx.
Installing requirements for osx.
Updating system - please wait
Installing required packages: gcc46, libksba - please wait
Error running 'requirements_osx_brew_libs_install gcc46 libksba',
showing last 15 lines of /Users/bhushanahire/.rvm/log/1402346437_ruby-1.9.2-head/package_install_gcc46_libksba.log
+rvm_pretty_print:10> case stdout (stdout)
+rvm_pretty_print:11> [[ -t 1 ]]
+rvm_pretty_print:11> return 1
+rvm_warn:4> printf %b 'There were package installation errors, make sure to read the log.

Try `brew tap --repair` and make sure `brew doctor` looks reasonable.

Check Homebrew requirements https://github.com/Homebrew/homebrew/wiki/Installation\n'
There were package installation errors, make sure to read the log.

Try `brew tap --repair` and make sure `brew doctor` looks reasonable.

Check Homebrew requirements https://github.com/Homebrew/homebrew/wiki/Installation
+requirements_osx_brew_libs_install:11> case 10.10 (10.6)
+requirements_osx_brew_libs_install:18> return 1
Requirements installation failed with status: 1.




Output of Log File


cat /Users/bhushanahire/.rvm/log/1402346437_ruby-1.9.2-head/package_install_gcc46_libksba.log
+requirements_osx_brew_libs_install:2> brew unlink gcc46 libksba
Error: No such keg: /usr/local/Cellar/gcc46
+requirements_osx_brew_libs_install:2> true
+requirements_osx_brew_libs_install:3> brew install gcc46 libksba
==> Downloading http://ftpmirror.gnu.org/gcc/gcc-4.6.4/gcc-4.6.4.tar.bz2
Already downloaded: /Library/Caches/Homebrew/gcc46-4.6.4.tar.bz2
==> ../configure --build=x86_64-apple-darwin14.0.0 --prefix=/usr/local/Cellar/gcc46/4.6.4 --enable-languages=c,c++,objc,obj-c++ --program-suffix=-4.6 --with-gmp=/usr/local/opt/gmp4 --with-mpfr=/usr/local/opt/mpfr2 --with-mpc=/usr/local/opt/libmpc08 --with-ppl=/usr/local/opt/ppl011 --with-cloog=/usr/local/opt/cloog-ppl015 --with-system-zlib --enable-version-specific-runtime-libs --enable-libstdcxx-time=yes --enable-stage1-checking --enable-checking=release --enable-lto --disable-werror --with-pkgversion=Homebrew gcc46 4.6.4 --with-bugurl=https://github.com/Homebrew/homebrew-versions/issues --enable-plugin --disable-nls --enable-multilib
==> make bootstrap
make[3]: *** Waiting for unfinished jobs....
rm gcc.pod
make[2]: *** [all-stage1-gcc] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [bootstrap] Error 2
Error: Homebrew doesn't know what compiler versions ship with your version
of Xcode (6.0). Please `brew update` and if that doesn't help, file
an issue with the output of `brew --config`:
  https://github.com/Homebrew/homebrew/issues

Note that we only track stable, released versions of Xcode.

Thanks!

READ THIS: https://github.com/Homebrew/homebrew/wiki/troubleshooting
If reporting this issue please do so at (not Homebrew/homebrew):
  https://github.com/homebrew/homebrew-versions/issues

+requirements_osx_brew_libs_install:5> typeset 'ret=1'
+requirements_osx_brew_libs_install:6> rvm_warn 'There were package installation errors, make sure to read the log.

Try `brew tap --repair` and make sure `brew doctor` looks reasonable.

Check Homebrew requirements https://github.com/Homebrew/homebrew/wiki/Installation'
+rvm_warn:2> rvm_pretty_print stdout
+rvm_pretty_print:2> case auto (0|no)
+rvm_pretty_print:2> case auto (1|auto)
+rvm_pretty_print:7> case xterm-256color (dumb|unknown)
+rvm_pretty_print:10> case stdout (stdout)
+rvm_pretty_print:11> [[ -t 1 ]]
+rvm_pretty_print:11> return 1
+rvm_warn:4> printf %b 'There were package installation errors, make sure to read the log.

Try `brew tap --repair` and make sure `brew doctor` looks reasonable.

Check Homebrew requirements https://github.com/Homebrew/homebrew/wiki/Installation\n'
There were package installation errors, make sure to read the log.

Try `brew tap --repair` and make sure `brew doctor` looks reasonable.

Check Homebrew requirements https://github.com/Homebrew/homebrew/wiki/Installation
+requirements_osx_brew_libs_install:11> case 10.10 (10.6)
+requirements_osx_brew_libs_install:18> return 1