gem check posix-spawn has problems

[liangrengongzuoshi]

How can I fix this ? :

posix-spawn-0.3.13.gem has 5 problems
ext/.RUBYARCHDIR.time:
Extra file
ext/Makefile:
Extra file
ext/posix-spawn.o:
Extra file
ext/posix_spawn_ext.so:
Extra file
lib/posix_spawn_ext.so:
Extra file

[hunterb279]

same here with but not the same gem
yajl-ruby-1.3.1.gem has 13 problems
ext/yajl/.sitearchdir.-.yajl.time:
Extra file
ext/yajl/Makefile:
Extra file
ext/yajl/yajl.o:
Extra file
ext/yajl/yajl.so:
Extra file
ext/yajl/yajl_alloc.o:
Extra file
ext/yajl/yajl_buf.o:
Extra file
ext/yajl/yajl_encode.o:
Extra file
ext/yajl/yajl_ext.o:
Extra file
ext/yajl/yajl_gen.o:
Extra file
ext/yajl/yajl_lex.o:
Extra file
ext/yajl/yajl_parser.o:
Extra file
ext/yajl/yajl_version.o:
Extra file
lib/yajl/yajl.so:
Extra file
can any one help