It seems that this question was answered many times on the Code::Blocks forum:
http://forums.codeblocks.org/index.php/topic,517.0.html
http://forums.codeblocks.org/index.php?topic=787.0
http://forums.codeblocks.org/index.php?topic=980.0
http://forums.codeblocks.org/index.php?topic=1470.0
http://forums.codeblocks.org/index.php?topic=2770.0