C version of #1006
Note that I switched all the C builds to use -O2 and that meant
that the compiler found some more warnings so I also fixed these
up. The possibly undefined ones were harmless, the aliasing one
is now more correct.
As these are small programs, the caching from `docker build` makes
no real difference, and worst case compile time is much better.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
This means that multiple builds will not conflict, so we can
remove the lock from the CI. Also quieter when no errors.
Some still left to do, only done the ones used in build and CI
initially. Some of the others will be cleaned up anyway later.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
Linux xargs calls the command with no arguments if it gets no inputs, which
`docker rmi` complains about. It provides -r / --no-run-if-empty to prevent
this but unfortunately this isn't supported on OSX.
Ignore errors from `docker rmi` so that `make clean` will keep going and clean
up later stuff.
Signed-off-by: Ian Campbell <ian.campbell@docker.com>
Also tidy up some of the coding style to be more Linux kernel style
which most of the code already was.
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
