Using library paths in makefiles
Instead of -L./cygdrive/c, use -L/cygdrive/c. The dot makes the library path relative from the current directory, i.e. it will look for a cygdrive subfolder of the current folder instead of drive C.
Instead of -L./cygdrive/c, use -L/cygdrive/c. The dot makes the library path relative from the current directory, i.e. it will look for a cygdrive subfolder of the current folder instead of drive C.