What's the correct way to load zlib via LDFLAGS in Makefile in LLVM?

my CFLAGS have

-I../../usr/local/sys/usr/include

      

        
        
        
      

    

which loads zlib.h correctly

LDFLAGS

LDFLAGS = -L../../usr/local/sys/usr/lib -lxml2 -lzlib

      

        
        
        
      

    

But when the linker tries to link the following events

1>   + Linking project files...
1>  ld: library not found for -lzlib
1>  collect2: ld returned 1 exit status
1>  make: *** [link] Error 1

      

        
        
        
      

    

What could be the problem?

Environment is iosdevenv under windows7 (so directory structure is different from mac os structure)