/in/foo.cc: In function 'int main()':
/in/foo.cc:15:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=1;i<=strlen(xx);i++)
             ~^~~~~~~~~~~~
/in/foo.cc:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(j=1;j<=strlen(yy);j++)
                 ~^~~~~~~~~~~~

FormatError('config file not found',)