This is probably bad form for this board, and feel free to delete it if it is, but running
brew doctor reveals the following:
Warning: /usr/local/lib/pkgconfig isn't writable. This can happen if you "sudo make install" software that isn't managed by Homebrew. If a brew tries to write a .pc file to this directory, the install will fail during the link step. You should probably `chown` /usr/local/lib/pkgconfig 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/freetype-config /opt/local/bin/libpng-config /opt/local/bin/libpng15-config /opt/local/bin/Magick++-config /opt/local/bin/Magick-config /opt/local/bin/MagickCore-config /opt/local/bin/MagickWand-config /opt/local/bin/ncurses5-config /opt/local/bin/ncursesw5-config /opt/local/bin/pkg-config /opt/local/bin/python2-config /opt/local/bin/python2.7-config /opt/local/bin/Wand-config /opt/local/bin/xml2-config /Users/Paul/.rvm/gems/ruby-1.9.3-p194/bin/passenger-config /Library/Frameworks/Python.framework/Versions/2.7/bin/python-config /Library/Frameworks/Python.framework/Versions/2.7/bin/python2-config /Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7-config Warning: /Library/Frameworks/Mono.framework detected This can be picked up by CMake's build system and likely cause the build to fail. You may need to move this file out of the way to compile CMake. 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 sudo mv /opt/local ~/macports Warning: Your Homebrew is outdated You haven't updated for at least 24 hours, this is a long time in brewland!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: You have leftover files from an older version of Xcode. You should delete them using: Developer/Library/uninstall-developer-folder 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/libFLAC++.2.1.2.dylib /usr/local/lib/libFLAC++.2.dylib /usr/local/lib/libFLAC++.dylib /usr/local/lib/libFLAC.4.1.2.dylib /usr/local/lib/libFLAC.4.dylib /usr/local/lib/libFLAC.dylib /usr/local/lib/libguide.dylib /usr/local/lib/libmacfuse_i32.2.dylib /usr/local/lib/libmacfuse_i64.2.dylib /usr/local/lib/libosxfuse_i32.2.dylib /usr/local/lib/libosxfuse_i64.2.dylib /usr/local/lib/libusb-1.0.0.dylib Warning: Unbrewed .la files 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 .la files: /usr/local/lib/libFLAC++.la /usr/local/lib/libFLAC.la /usr/local/lib/libosxfuse_i32.la /usr/local/lib/libosxfuse_i64.la 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/osxfuse.pc 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/libFLAC++.a /usr/local/lib/libFLAC.a Warning: Suspicious Git newline settings found. The detected Git newline settings can cause checkout problems: core.autocrlf = input core.safecrlf = true If you are not routinely dealing with Windows-based projects, consider removing these settings. 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 /usr/local/Library && git stash && git clean -f Error: Homebrew doesn't know what compiler versions ship with your version of Xcode. Please file an issue with the output of `brew --config`: https://github.com/mxcl/homebrew/issues Thanks! 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: 2to3 2to3-2.7 idle idle2.7 pydoc pydoc2.7 python python-config python2.7 python2.7-config pythonw pythonw2.7 smtpd.py smtpd2.7.py Consider amending your PATH so that /usr/local/bin occurs before /usr/bin in your PATH. Warning: You have a non-Homebrew 'pkg-config' in your PATH: /usr/bin/pkg-config => /Library/Frameworks/Mono.framework/Versions/2.10.8/bin/pkg-config This was most likely created by the Mono installer. `./configure` may have problems finding brew-installed packages using this other pkg-config.
I don't even know where to start here. I know enough about this sort of thing to run
brew doctor and maybe fix a permissions error, but this is just overwhelming.
Any help as to which of these errors are important, which I can ignore, issues I might have with other programs if I "fix" these, would be appreciated.
I only used MacPorts to install Image Magick and probably have no use for it otherwise, and I have no idea why I have the Mono Framework. I have no plans to be an iOS developer anytime soon.