gtags and ctags like --regex support

[Aneesh Kumar]

Hi,

Is there a way i can make gtags makes tags based on the regex matching
in addition to the tags made with the standard parsing based on
language ?
What i wanted to achive is to  use something like
--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/'
That would help me have tag data generated with name like
sys_fallocate where in the code it will appear
as SYSCALL_DEFINE(fallocate)(int fd, int mode, loff_t offset, loff_t len)

-aneesh