10.3-RELEASE-p13 "unsupported file layout"

[George Mitchell]

After today's OpenSSH security message, I did:

cd /usr
rm -rf obj
cd src
svn update -r311916
make buildworld

After a while, I got to:

building shared library libc.so.7
cc (a very long compile line)
./libc.so.7: unsupported file layout
*** Error code 1

Stop.
make[4]: stopped in /usr/src/lib/libc
*** Error code 1

Stop.
make[3]: stopped in /usr/src
*** Error code 1

Stop.
make[2]: stopped in /usr/src
*** Error code 1

Stop.
make[1]: stopped in /usr/src
*** Error code 1

Stop.
make: stopped in /usr/src

freebsd-version -ku
10.3-RELEASE-p13
10.3-RELEASE-p15

I am using a generic kernel, except for using SCHED_4BSD.  If it
weren't for that, I would just use freebsd-update.

Googling suggests that my build tree is somehow mixing up 32 and 64
bit files.  (I'm running on an amd64 machine.)  How do I get this
cleared up?                                             -- George

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