48 lines
1.1 KiB
Markdown
48 lines
1.1 KiB
Markdown
# Building an OpenBSD Kernel
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I'm running OpenBSD-current for a while in order to support my port.
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It's only one port at the moment, but that's a start, right?
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Anyway... every once in a while I stumble over a patch on the OpenBSD
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mailing list I want to try and this requires me to apply the patch and
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build the Kernel with it. But how?
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Well, the documentation is where
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[where you would expect it](https://www.openbsd.org/faq/faq5.html#Custom).
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*Download the kernel source*
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<pre>
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# cd /usr
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# cvs -qd anoncvs@anoncvs.ca.openbsd.org:/cvs checkout -P src
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</pre>
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*Update the kernel source (if you downloaded it a while ago)*
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<pre>
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# cd /usr/src
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# cvs -q up -Pd
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</pre>
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*Configure Kernel*
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<pre>
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# cd /usr/src/sys/arch/amd64/conf
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# cp GENERIC.MP MYKERNEL
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# config MYKERNEL
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</pre>
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*Build and install kernel (amd64)*
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<pre>
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# cd /sys/arch/amd64/compile/MYKERNEL
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# make clean
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# make
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# make install # the old kernel is /obsd now
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</pre>
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That's it. Reboot.
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This is ONLY the Kernel. If you need to build the whole system, please
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consult the OpenBSD documentation. The manpage release(8) is a good start.
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