I don't think it's the way you modified the file but the way gcc works!

I found this: http://wiki.maemo.org/Documentation/...ment/Maemo_SDK

"The source code started with #include, and you need to tell the compiler where to look for that critical -- header file. The compiler probably also needs some special flags to be able to use the correct compilation settings for building -- software...
When linking the application, the linker has to be told which libraries to link against. In fact, the whole program linking phase will fail without this information. "

So, I think I have to tell the compiler about libcal location or something..