make buildworld ERROR in RELENG_5 with WITH_LIB32 (amd64)

[Alexander Konovalenko]

Hello!

I am having a trouble to buildworld on my AMD64. Fresh update to RELENG_5 did 
not help. I 

I have WITH_LIB32=yes in /etc/make.conf, is this functionality broken?

Without lib32 buildworld works just fine.

regards,
 Alexander

cc -m32 -march=athlon-xp -msse2 -mfancy-math-387 -DCOMPAT_32BIT  
-I/usr/obj/usr/src/lib32/usr/include  -L/usr/obj/usr/src/lib32/usr/lib32  
-B/usr/obj/usr/src/lib32/usr/lib32 -O -pipe -ffast-math -O2 -pipe 
-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/lib32/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 /usr/src/lib/libc/i386/sys/_amd64_get_fsbase.c
/usr/src/lib/libc/i386/sys/_amd64_get_fsbase.c: In function 
`_amd64_get_fsbase':
/usr/src/lib/libc/i386/sys/_amd64_get_fsbase.c:40: warning: dereferencing 
type-punned pointer will break strict-aliasing rules
*** Error code 1

Stop in /usr/src/lib/libc.
*** Error code 1

Stop in /usr/src/lib.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.