>Number:         35364
>Category:       kern
>Synopsis:       Kernel compile fails due to code warning on sys/net/if_ethersubr.c
>Confidential:   no
>Severity:       critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 06 01:05:00 +0000 2007
>Originator:     Gene ENonymous
>Release:        NetBSD 3 (cvs flag -rnetbsd3) stable branch
>Organization:
>Environment:
NetBSD clarity.homeip.net 3.1_STABLE NetBSD 3.1_STABLE (CLARITY) #11: Wed Nov 22 18:35:55 EST 2006  root@clarity.homeip.net:/usr/obj/sys/arch/i386/compile/CLARITY i386

>Description:
For about the last 2-3 weeks, I have been unable to build the kernel from a clean CVS. The fix is aparently trivial - comment or delete line 1034 to eliminate the unused label statement.

The build.sh job fails with:
cat /usr/src/sys/arch/i386/i386/genassym.cf  |  sh /usr/src/sys/kern/genassym.sh CC=/usr/src/../tools/bin/i386--netbsdelf-gcc /usr/src/../tools/bin/nbmkdep -f assym.dep --       -ffreestanding   -O2 -Werror -Wall -Wno-main -Wno-format-zero-length -Wpointer-arith -Wmissing-prototypes -Wstrict-prototypes -Wno-sign-compare -fno-zero-initialized-in-bss  -Di386 -I.  -I/usr/src/sys/arch -I/usr/src/sys -nostdinc -DNMBCLUSTERS="65568" -DMAXFILES="4096" -DNOFILE="4096" -DLKM -DIPFILTER_LOOKUP -DMAXUSERS=16 -D_KERNEL -D_KERNEL_OPT -I/usr/src/sys/dist/ipf
#   compile  CLARITY/if_ethersubr.o
/usr/src/../tools/bin/i386--netbsdelf-gcc -ffreestanding -O2 -Werror -Wall -Wno-main -Wno-format-zero-length -Wpointer-arith -Wmissing-prototypes -Wstrict-prototypes -Wno-sign-compare -fno-zero-initialized-in-bss -Di386 -I. -I/usr/src/sys/arch -I/usr/src/sys -nostdinc -DNMBCLUSTERS=65568 -DMAXFILES=4096 -DNOFILE=4096 -DLKM -DIPFILTER_LOOKUP -DMAXUSERS=16 -D_KERNEL -D_KERNEL_OPT -I/usr/src/sys/dist/ipf -c /usr/src/sys/net/if_ethersubr.c
/usr/src/sys/net/if_ethersubr.c: In function `ether_input':
/usr/src/sys/net/if_ethersubr.c:1034: warning: label `dropanyway' defined but not used

*** Failed target:  if_ethersubr.o


>How-To-Repeat:
Every time I try to compile my kernel (mostly a tuned i386 GENERIC with raid, ipf and ippool support) this crashes until I delete or comment out the offending line of unused label/unreachable code.
>Fix:
Delete or comment out line 1034 in sys/net/if_ethersubr.c per the compile error.