[Yaffs] porting yaffs2 to linux user mode

hi all,
         I am porting yaffs2 to linux user mode
i have latest version of the source code.
as your direction i have done cd direct make
there is an error as below..
Makefile:53: target `yaffs_fileem.o' given more than once in the same rule.
ln -s ../yaffs_ecc.c yaffs_ecc.c
ln: `yaffs_ecc.c': File exists
make: *** [yaffs_ecc.c] Error 1
and one more thing is that some files in
this sourcr code doesnt have any permissions
they dont even have read permission also...
please help me....
tkanks