Build only changes

[Garrett Cooper]

> On Nov 30, 2015, at 03:37, Alexnader Kuleshov <kuleshovmail at gmail.com> wrote:
> 
> Hello All,
> 
> I'm new in FreeBSD, so my question can be stupid, but I have just executed
> `make buildworld` and it was successful. Now I want to do some little changes
> for example in one of `usr.sbin` application. How can I recompile only changed
> application? If I'm executing `make buildworld` again, I see that there is
> new long-long-time compilation of the full base.
> 
> I've started to look into the base's Makefiles and tried to execute:
> 
> make buildworld -j4 -DMK_CDDL=no -DMK_KERBEROS=no -DMK_RESCUE=no -DMK_CRYPT=no
> -DMK_TEST=no -DNO_CLEAN=yes -DMK_CLANG_BOOTSTRAP=no -DMK_CLANG=no
> 
> but anyway I see that contrib/llvm/tools/clang/* is compiling.
> 
> Is there ability to compile only one separate dir in the FreeBSD base?

Alexnader,
    If you want to compile just one directory using buildworld and your tree has already been built, use SUBDIR_OVERRIDE=usr.bin/directory -DNO_CLEAN.
Cheers,
-NGie