brew doctor

gistfile1.txt

Warning: "config" scripts exist outside your system or Homebrew directories.
`./configure` scripts often look for *-config scripts to determine if
software packages are installed, and what additional flags to use when
compiling and linking.

Having additional scripts in your path can confuse software installed via
Homebrew if the config script overrides a system or Homebrew provided
script of the same name. We found the following "config" scripts:

    /usr/local/bin/couch-config
    /usr/local/bin/freetype-config
    /usr/local/bin/icu-config
    /usr/local/bin/js-config
    /usr/local/bin/libpng-config
    /usr/local/bin/libpng15-config
    /usr/local/bin/Magick++-config
    /usr/local/bin/Magick-config
    /usr/local/bin/MagickCore-config
    /usr/local/bin/MagickWand-config
    /usr/local/bin/nspr-config
    /usr/local/bin/pkg-config
    /usr/local/bin/Wand-config
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:

    icu4c
Warning: You have uncommitted modifications to Homebrew
If this a surprise to you, then you should stash these modifications.
Stashing returns Homebrew to a pristine state but can be undone
should you later need to do so for some reason.
    cd /Users/jan/Work/homebrew/Library && git stash && git clean -f
Warning: Your Homebrew is not installed to /usr/local
You can install Homebrew anywhere you want, but some brews may only build
correctly if you install in /usr/local. Sorry!
Warning: Your compilers are different from the standard versions for your Xcode.
If you have Xcode 4.3 or newer, you should install the Command Line Tools for
Xcode from within Xcode's Download preferences.
Otherwise, you should reinstall Xcode.
Warning: You have a non-Homebrew 'pkg-config' in your PATH:
  /usr/local/bin/pkg-config

`./configure` may have problems finding brew-installed packages using
this other pkg-config.