./build uninstall
+
+I2C:
+
+If your system has the correct i2c-dev libraries and headers installed,
+then the I2C helpers will be compiled into wiringPi. If you want to
+use the I2C helpers and don't have them installed, then under Raspbian,
+issue the command:
+
+ sudo apt-get install libi2c-dev
+
+Consult the documentation for your system if you are not running Raspbian.
+
Gordon Henderson
projects@drogon.net