Buildworld problem in 5.1-CURRENT

I cvsup'ed this morning and buildworld failed:

...

===> lib/libpam/modules/pam_echo
cc -O2 -pipe -march=pentiumpro
-I/usr/src/lib/libpam/modules/pam_echo/../../../../contrib/openpam/include
-I/usr/src/lib/libpam/modules/pam_echo/../../libpam
-Wsystem-headers -Werror -Wall -Wno-format-y2k -W
-Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith
-Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow
-Wcast-align -Wno-uninitialized  -c
/usr/src/lib/libpam/modules/pam_echo/pam_echo.c
/usr/src/lib/libpam/modules/pam_echo/pam_echo.c: In function
`_pam_echo':
/usr/src/lib/libpam/modules/pam_echo/pam_echo.c:92: warning: dereferencing
type-punned pointer will break strict-aliasing rules
*** Error code 1

Stop in /usr/src/lib/libpam/modules/pam_echo.
*** Error code 1

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

Stop in /usr/src/lib/libpam.
*** 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.
3070.221u 348.805s 1:06:24.35 85.8%     3287+2406k 2053+890io
806pf+0w

I should probably note that:

-This was done with 'make -DNO_RESCUE buildworld' as per UPDATING
-I had not updated since shortly after installing 5.1-RELEASE
-A previous buildworld had failed (with error code 2) so I ran
'make install' from contrib/gcc to go to 3.3.1
-I did check the archives for the last week (via the web), but
the other buildworld problems don't mention this.

fordprefect# gcc -v
Using built-in specs.
Configured with: FreeBSD/i386 system compiler
Thread model: posix
gcc version 3.3.1 [FreeBSD] 20030711 (prerelease)
fordprefect#

Chris Johnson
cjohnson-freebsd_at_wcug.wwu.edu

Q:      How many supply-siders does it take to change a light bulb?
A:      None.  The darkness will cause the light bulb to change by itself.