Tested having the same revision, skipped.
Testing having a different revision, did not skip.
Tested same revision with universe and had this glorious result:
```
~/git/freebsd # grep SMART _*.buildworld
_.amd64.amd64.buildworld:make[2]: "/root/git/freebsd/Makefile.inc1" line 144: SMART_CROSS_COMPILER: Determined that CC=/usr/local/bin/ccache cc matches the source tree. Not bootstrapping a cross-compiler.
_.arm.arm.buildworld:make[2]: "/root/git/freebsd/Makefile.inc1" line 144: SMART_CROSS_COMPILER: Determined that CC=/usr/local/bin/ccache cc matches the source tree. Not bootstrapping a cross-compiler.
_.arm.armeb.buildworld:make[2]: "/root/git/freebsd/Makefile.inc1" line 144: SMART_CROSS_COMPILER: Determined that CC=/usr/local/bin/ccache cc matches the source tree. Not bootstrapping a cross-compiler.
_.arm.armv6.buildworld:make[2]: "/root/git/freebsd/Makefile.inc1" line 144: SMART_CROSS_COMPILER: Determined that CC=/usr/local/bin/ccache cc matches the source tree. Not bootstrapping a cross-compiler.
_.arm.armv6hf.buildworld:make[2]: "/root/git/freebsd/Makefile.inc1" line 144: SMART_CROSS_COMPILER: Determined that CC=/usr/local/bin/ccache cc matches the source tree. Not bootstrapping a cross-compiler.
_.i386.i386.buildworld:make[2]: "/root/git/freebsd/Makefile.inc1" line 144: SMART_CROSS_COMPILER: Determined that CC=/usr/local/bin/ccache cc matches the source tree. Not bootstrapping a cross-compiler.
_.pc98.i386.buildworld:make[2]: "/root/git/freebsd/Makefile.inc1" line 144: SMART_CROSS_COMPILER: Determined that CC=/usr/local/bin/ccache cc matches the source tree. Not bootstrapping a cross-compiler.
```