And then rebuild and install libc, and statically linked binaries:
cd /usr/src/lib/libc
make obj && make && make install
cd /usr/src/bin
make obj && make && make install
cd /usr/src/sbin
make obj && make && make install
cd /usr/src/usr.bin/kdump
make obj && make && make install
cd /usr/src/usr.bin/ktrace
make obj && make && make install
cd /usr/src/usr.sbin/chroot
make obj && make && make install
cd /usr/src/usr.sbin/installboot
make obj && make && make install
cd /usr/src/usr.sbin/watchdogd
make obj && make && make install