# in-guest build (stock kernel session, /root/df3195):
# $ sh build.sh
cc -O2 -o fakesrv_retype fakesrv_retype.c
cc -O2 -o trigger_retype trigger_retype.c
BUILD_OK
-rwxr-xr-x  1 root  wheel  20872 Sep  8 07:13 fakesrv_retype
-rwxr-xr-x  1 root  wheel   9112 Sep  8 07:13 trigger_retype
(no warnings or errors)