How to manage files with different folders for make

[rajeshs]

Hello Friends,

I am working in qt4.2 windows ,i am using mingw,

I have different folders for different modules in my application,

When i give make each time it takes all files to compile, but if i use same folder it only takes whatever files i changed,

How to avoid the recompilation of all files rather than changed files?

Thank you
Rajesh,S