make Nothing to be done for all

if you get following response when call make

$ make
make: Nothing to be done for 'all'

this is not error. it tell you that it successfully built code.
but not currently but before sometime.

when you enter make command it will check timestamp of earliest compiled code and source code timestamp, if it indicates files are not modified after last compilation then compiler will not compile it, instead it will give as response like the above,

if still you want to forcefully recompile then use following command.

make clean
make