`brew doctor` output

gistfile1.txt

Warning: Your XQuartz (2.7.2) is outdated
Please install XQuartz 2.7.4.
Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
    /usr/local/lib/libEnhancedDisassembly.dylib
    /usr/local/lib/libLTO.dylib
    /usr/local/lib/LLVMHello.dylib
    /usr/local/lib/profile_rt.dylib
Warning: Unbrewed static libraries were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected static libraries:
    /usr/local/lib/libCompilerDriver.a
    /usr/local/lib/libEnhancedDisassembly.a
    /usr/local/lib/libLLVMAlphaAsmPrinter.a
    /usr/local/lib/libLLVMAlphaCodeGen.a
    /usr/local/lib/libLLVMAlphaInfo.a
    /usr/local/lib/libLLVMAnalysis.a
    /usr/local/lib/libLLVMArchive.a
    /usr/local/lib/libLLVMARMAsmParser.a
    /usr/local/lib/libLLVMARMAsmPrinter.a
    /usr/local/lib/libLLVMARMCodeGen.a
    /usr/local/lib/libLLVMARMDisassembler.a
    /usr/local/lib/libLLVMARMInfo.a
    /usr/local/lib/libLLVMAsmParser.a
    /usr/local/lib/libLLVMAsmPrinter.a
    /usr/local/lib/libLLVMBitReader.a
    /usr/local/lib/libLLVMBitWriter.a
    /usr/local/lib/libLLVMBlackfinAsmPrinter.a
    /usr/local/lib/libLLVMBlackfinCodeGen.a
    /usr/local/lib/libLLVMBlackfinInfo.a
    /usr/local/lib/libLLVMCBackend.a
    /usr/local/lib/libLLVMCBackendInfo.a
    /usr/local/lib/libLLVMCellSPUAsmPrinter.a
    /usr/local/lib/libLLVMCellSPUCodeGen.a
    /usr/local/lib/libLLVMCellSPUInfo.a
    /usr/local/lib/libLLVMCodeGen.a
    /usr/local/lib/libLLVMCore.a
    /usr/local/lib/libLLVMCppBackend.a
    /usr/local/lib/libLLVMCppBackendInfo.a
    /usr/local/lib/libLLVMExecutionEngine.a
    /usr/local/lib/libLLVMInstCombine.a
    /usr/local/lib/libLLVMInstrumentation.a
    /usr/local/lib/libLLVMInterpreter.a
    /usr/local/lib/libLLVMipa.a
    /usr/local/lib/libLLVMipo.a
    /usr/local/lib/libLLVMJIT.a
    /usr/local/lib/libLLVMLinker.a
    /usr/local/lib/libLLVMMBlazeAsmPrinter.a
    /usr/local/lib/libLLVMMBlazeCodeGen.a
    /usr/local/lib/libLLVMMBlazeInfo.a
    /usr/local/lib/libLLVMMC.a
    /usr/local/lib/libLLVMMCParser.a
    /usr/local/lib/libLLVMMipsAsmPrinter.a
    /usr/local/lib/libLLVMMipsCodeGen.a
    /usr/local/lib/libLLVMMipsInfo.a
    /usr/local/lib/libLLVMMSIL.a
    /usr/local/lib/libLLVMMSILInfo.a
    /usr/local/lib/libLLVMMSP430AsmPrinter.a
    /usr/local/lib/libLLVMMSP430CodeGen.a
    /usr/local/lib/libLLVMMSP430Info.a
    /usr/local/lib/libLLVMPIC16AsmPrinter.a
    /usr/local/lib/libLLVMPIC16CodeGen.a
    /usr/local/lib/libLLVMPIC16Info.a
    /usr/local/lib/libLLVMpic16passes.a
    /usr/local/lib/libLLVMPowerPCAsmPrinter.a
    /usr/local/lib/libLLVMPowerPCCodeGen.a
    /usr/local/lib/libLLVMPowerPCInfo.a
    /usr/local/lib/libLLVMScalarOpts.a
    /usr/local/lib/libLLVMSelectionDAG.a
    /usr/local/lib/libLLVMSparcAsmPrinter.a
    /usr/local/lib/libLLVMSparcCodeGen.a
    /usr/local/lib/libLLVMSparcInfo.a
    /usr/local/lib/libLLVMSupport.a
    /usr/local/lib/libLLVMSystem.a
    /usr/local/lib/libLLVMSystemZAsmPrinter.a
    /usr/local/lib/libLLVMSystemZCodeGen.a
    /usr/local/lib/libLLVMSystemZInfo.a
    /usr/local/lib/libLLVMTarget.a
    /usr/local/lib/libLLVMTransformUtils.a
    /usr/local/lib/libLLVMX86AsmParser.a
    /usr/local/lib/libLLVMX86AsmPrinter.a
    /usr/local/lib/libLLVMX86CodeGen.a
    /usr/local/lib/libLLVMX86Disassembler.a
    /usr/local/lib/libLLVMX86Info.a
    /usr/local/lib/libLLVMXCoreAsmPrinter.a
    /usr/local/lib/libLLVMXCoreCodeGen.a
    /usr/local/lib/libLLVMXCoreInfo.a
    /usr/local/lib/libLTO.a
    /usr/local/lib/libplugin_llvmc_Base.a
    /usr/local/lib/libplugin_llvmc_Clang.a
    /usr/local/lib/libUnitTestMain.a
Warning: You have unlinked kegs in your Cellar
Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
those kegs to fail to run properly once built. Run `brew link` on these:

    ack
    git
    graphviz
    jasper
    libicns
    libtiff
    little-cms
    nspr
    portaudio
    redis
    sdl
    spidermonkey
    tomcat
Warning: Some installed formula are missing dependencies.
You should `brew install` the missing dependencies:

    brew install freetype gmp nettle p11-kit

Run `brew missing` for more details.
Error: Homebrew doesn't know what compiler versions ship with your version
of Xcode (4.6.2). Please `brew update` and if that doesn't help, file
an issue with the output of `brew --config`:
  https://github.com/mxcl/homebrew/issues

Thanks!
Warning: Some keg-only formula are linked into the Cellar.
Linking a keg-only formula, such as gettext, into the cellar with
`brew link <formula>` will cause other formulae to detect them during
the `./configure` step. This may cause problems when compiling those
other formulae.

Binaries provided by keg-only formulae may override system binaries
with other strange results.

You may wish to `brew unlink` these brews:

    ossp-uuid
    openssl
Warning: Your Homebrew is outdated
You haven't updated for at least 24 hours, this is a long time in brewland!