Increasing FD_SETSIZE

[Marco Stornelli]

Hi all,

I need to increase the FD_SETSIZE value from 1024 to 4096. I know it'd 
be better to use poll()/epoll() but I want to understand what are 
pros/cons. The main question is: have I to recompile glibc? I read 
several thread where the change of .h after changing FD_SETSIZE works 
recompiling only the user application. Reading the glibc code (and the 
kernel too), actually it seems to me that if I want to use select(), 
FD_* macro and so on, I have to recompile all because the size of fd_set 
is changed. At this point I have to recompile *all* not only my 
application because if in the system there is an another "common" 
application that uses select and friends, I could have problem. Am I right?

Thanks,

Marco