We will be compiling and installing all the packages into /usr/local. You may want to verify if this folder already exists and its contents before proceeding. The folder /usr/local does not exist on a fresh installation of OS X.
Create the necessary folders.
sudo mkdir -p /usr/local/src
sudo mkdir -p /usr/local/var/log
mkdir -p ~/Library/LaunchAgents
Modify the ownership of /usr/local and its children to make yourself the owner.
sudo chown -R $LOGNAME:staff /usr/local