Newbie question - Custom compiler flags in Makefile

[Arjun]

Hey,

I am writing a memory driver and i am using the standard freebsd driver
Makefile which includes .bsd.kmod.mk

So, this comes with its own compiler flags. Specifically, i dont want the
-Wmissing-prototypes option. How do i remove it.

In general, how can one change the default compiler flags for compilation. ?

I read bsd.sys.mk file and it seems that for the above option to be
removed, i need to have WARNS <3. But i want all other -W options except
for this.

How do i do this.?

Any help is appreciated.

Thanks