Notices

Hi,
I am making an application programing with language C,
my problem is that I use the function 'clock_gettime' and it use the type 'clockid_t' I can compile and execute in my pc and that's ok but when I try create my .deb to install in my N800 it doesn't ok it says that not recognized 'clockid_t' (exactly ... undefined)
If somebody know what can be the problem.... I NEED HELP please!!!!!
thanks