Hello:
        The wifistg also have the same problems when i build it .
   
/home/jiangc/stage/libstage/model_wifi.cc: In constructor ‘Stg::ModelWifi::ModelWifi(Stg::World*, Stg::Model*, const std::string&)’:
/home/jiangc/stage/libstage/model_wifi.cc:341: warning£º neglect  the "size_t fread(void*, size_t, size_t, FILE*)"return value of the "warn_unused_result"  property in statement.
/home/jiangc/stage/libstage/model_wifi.cc: In constructor ‘Stg::ModelWifi::ModelWifi(Stg::World*, Stg::Model*, const std::string&)’:
/home/jiangc/stage/libstage/model_wifi.cc:341: warning:neglect the "size_t fread(void*, size_t, size_t, FILE*)" return value of the "warn_unused_result" property in statement.
/home/jiangc/stage/libstage/model_wifi.cc: In constructor ‘Stg::ModelWifi::ModelWifi(Stg::World*, Stg::Model*, const std::string&)’:
/home/jiangc/stage/libstage/
model_wifi.cc:341: warning£º neglect the "size_t fread(void*,
size_t, size_t, FILE*)" return value of the "warn_unused_result" property in statement.
        And also the same last problem.