did I miss something?  Here's what I get when compiling the GENERIC kernel
from tarballed sources I just downloaded:

cc -g -O2 -Werror -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wno-format -mno-fp-regs -I. -I../../../../arch -I../../../.. -nostdinc
-DEXEC_ECOFF -DEXEC_ELF64 -DEXEC_SCRIPT -DKTRACE -DDIAGNOSTIC -DFFS -DMFS
-DCD9660 -DMSDOSFS -DNFS -DFIFO -DNFSSERVER -DINET -DCOMPAT_43 -DCOMPAT_10
-DCOMPAT_11 -DCOMPAT_12 -DSYSVSHM -DLKM -DUCONSOLE -DMAXUSERS=8 -D_KERNEL
-Dalpha  -c ../../../../dev/rnd.c
cc1: warnings being treated as errors
../../../../dev/rnd.c:728: warning: function declaration isn't a prototype
*** Error code 1

Stop.

-- 
Jeff Rizzo                                         http://boogers.sf.ca.us/~riz