fatal error: Imlib2.h: No such file or directory, But I have this file

I have installed imlib2-1.4.5 and I have the file in /usr/local/lib path. Also I have created softlink for this package. When I use this in my project and load in eclipse ide, The above fatal error is found while compiling. I set the project settings with /usr/local/lib path also, but still I find the same mistake. I request your help to solve my problem. Thanks everyone in advance.