xcode4: Linker error: Directory not found for option

【問題】：

{Directory not found for option '-L../../../Mac/Profile/lib [full path of that directory]

Library not found for -lMyLib}

【解決方法】：

Go to "Get Info" on the target. Click the "Build Setting" tab (i using Xcode4), and scroll down to "Search Paths". You del all value in "Library Search Path".