Strange error kills make world for at least 2 days.

[Jeff Utter]

Hi, i've been trying to makeworld for the last 2 days (killing /usr/obj 
and re-cvsupping /usr/src between each build) and i keep getting this 
same, STRANGE error...


cc -fpic -DPIC -O -pipe -march=pentium4 -I/usr/src/lib/libc/include 
-I/usr/src/lib/libc/../../include -I/usr/src/lib/libc/i386 
-D__DBINTERFACE_PRIVATE -I/usr/src/lib/libc/../../contrib/gdtoa -DINET6 
-I/usr/obj/usr/src/lib/libc -DPOSIX_MISTAKE -I/usr/src/lib/libc/locale 
-DBROKEN_DES -DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -DYP 
-DHESIOD -Wsystem-headers -Werror -Wall -Wno-format-y2k 
-Wno-uninitialized -c crypt_xdr.c -o crypt_xdr.So
cc -O -pipe -march=pentium4 -I/usr/src/lib/libc/include 
-I/usr/src/lib/libc/../../include -I/usr/src/lib/libc/i386 
-D__DBINTERFACE_PRIVATE -I/usr/src/lib/libc/../../contrib/gdtoa -DINET6 
-I/usr/obj/usr/src/lib/libc -DPOSIX_MISTAKE -I/usr/src/lib/libc/locale 
-DBROKEN_DES -DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -DYP 
-DHESIOD -Wsystem-headers -Werror -Wall -Wno-format-y2k 
-Wno-uninitialized -c nslexer.c
/dev/stdout: In function `_nsyylex':
/dev/stdout:711: warning: label `find_rule' defined but not used
/usr/src/lib/libc/net/nslexer.l: At top level:
/dev/stdout:1678: warning: `yy_flex_realloc' defined but not used
*** Error code 1
1 error
*** Error code 2
1 error
*** Error code 2
1 error
*** Error code 2
1 error
*** Error code 2
1 error
*** Error code 2
1 error


It doesn't even look like an error to me.. it looks like 2 warnings? 
what is up. I tried building with no optimizations and with 
cputype=i686 (instead of p4) same error.. if anyone has any ideas, it 
would be greatly appreciated.

Thanks,
Jeff Utter