Why the variable 'int unused1; ' not appear in the output of 'global -c' or 'global -cr'? But in the output of 'global -crs'?

[????]

Hi All,


I have a just one line .cpp, which only contains one line below:


int unused1;


I run 'gtags', and then try 'global -c' to get 'unused1'.
But it does not appear in neither 'global -c' nor 'global -cr', but only in the 
output of 'global -crs'?


Any suggest will be appreciate.


Regards,
Gavin Wong