buildkernel without buildworld ?

C

cpalui

Hello, I'm new in freebsd FreeBSD, and I installed 9.0. Now I want to modify my kernel (only #options) and make buildkernel.

I don't understand why I must make buildworld, because I will make buildkernel in the same world, the 9.0 world where I didn't change anything.

Thank you if you can explain this to me.
 
You can do just make buildkernel and make installkernel as long as you're staying on the same major and minor version of FreeBSD. The reason why it works is that the toolchain that is installed on the system is exactly the same as the one that would be built by make buildworld. When upgrading to a newer version of FreeBSD it is usually necessary to do the full make buildworld, make buildkernel cycle.
 
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