If you receive the following message, "The procedure entry point _impure_ptr could not be located in the dynamic link library cygwin1.dll," you will need to go to Cygwin's website and click the "Install or Update Now" link on the front page. A direct link to this is http://cygwin.com/setup.exe.

Once you have downloaded and run "setup.exe", you will want to make sure that you select the "Install from Internet" option. From there just click through all the default settings and Cygwin will be updated. After this re-install the GNU Tools Toolchain from Logic's website and re-install the Sample Application and everything should build fine.