How can I (re)create development and build tools on a corrupt installation? On my previous computer I had Xcode working nicely; on my present computer, with Homebrew installed, gcc and make are present in /Developer/usr/bin but not /usr/bin. On the whole when I try to download and build http://JonathansCorner.com/download/tms1_4.tar.gz, I can find bits and pieces of the tools used to do things, but when invoked from its present path it doesn't recognize #include &lt;stdio.h&gt; type includes.

How can I reinstall Xcode, Homebrew, and anything else to get a fresh and working build so I can run make &amp;&amp; make install?
Reinstalling XCode and updating Homebrew should be enough. To do this:


Try the uninstall-devtools script from this answer to remove older XCode versions. (If it doesn't work or you can't find it, don't worry about it.)
Delete the entire /Developer directory if it exists. This is where older versions of XCode live.
Download and install the latest XCode for your OS version. (The App Store makes this easy.)
Install the Command Line Tools. In XCode, go to the Apple menu, select Preferences, select the Downloads section, and click Install next to Command Line Tools.
Update the Homebrew definitions and packages with brew update &amp;&amp; brew upgrade.


If any brewed packages still seem broken, brew rm them and brew install --fresh to reinstall.

Edit your shell config file (e.g. ~/.bashrc) to make sure /usr/local/bin is on your path. brew doctor can help diagnose this and other issues.


Note that tms is designed to install to /usr/lib by default, which you won't have permissions to do in a normal OS X setup even once you have all the tools installed, because the OS reserves /usr for its own use. You'll probably want to fiddle with the Makefile and tms.h to get it in to /usr/local or /opt, which are easier places to drop user-built packages.

If you're feeling ambitious, you could even do brew create http://jonathanscorner.com/download/tms1_4.tar.gz to make a Homebrew formula for TMS, making repeated installs easier.