`brew doctor` output

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:

    /opt/local/bin/icu-config
    /opt/local/bin/ncurses5-config
    /opt/local/bin/ncursesw5-config
    /opt/local/bin/pkg-config

Warning: You have Xcode-3.2.5, which is outdated.
Please install Xcode 3.2.6.

Warning: You have Macports or Fink installed.
This can cause trouble. You don't have to uninstall them, but you may like to
try temporarily moving them away, eg.

  sudo mv /opt/local ~/macports

Warning: Your Homebrew is outdated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

Warning: Unbrewed .pc files were found in /usr/local/lib/pkgconfig.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected .pc files:
    /usr/local/lib/pkgconfig/nodejs.pc

Warning: You have uncommitted modifications to Homebrew's core.
Unless you know what you are doing, you should run:
  cd /usr/local && git reset --hard

Warning: Your pkg-config is not checking "/usr/X11/lib/pkgconfig" for packages.
Earlier versions of the pkg-config formula did not add this path
to the search path, which means that other formula may not be able
to find certain dependencies.

To resolve this issue, re-brew pkg-config with:
  brew rm pkg-config && brew install pkg-config

Warning: /usr/bin occurs before /usr/local/bin
This means that system-provided programs will be used instead of those
provided by Homebrew. The following tools exist at both paths:

    easy_install
    easy_install-2.6
    lessc

Consider ammending your PATH so that /usr/local/bin
is ahead of /usr/bin in your PATH.

Warning: You have a non-brew 'pkg-config' in your PATH:
  /opt/local/bin/pkg-config

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