Once the edits to the custom configuration file have been saved, the source code for the kernel can be compiled using the following steps:
Change to this directory:
#cd /usr/src
Compile the new kernel by specifying the name of the custom kernel configuration file:
#make buildkernel KERNCONF=MYKERNEL
Install the new kernel associated with the specified
kernel configuration file. This command will copy the new
kernel to /boot/kernel/kernel and save
the old kernel to
/boot/kernel.old/kernel:
#make installkernel KERNCONF=MYKERNEL
Shutdown the system and reboot into the new kernel. If something goes wrong, refer to The kernel does not boot.
By default, when a custom kernel is compiled, all kernel
modules are rebuilt. To update a kernel faster or to build
only custom modules, edit /etc/make.conf
before starting to build the kernel.
For example, this variable specifies the list of modules to build instead of using the default of building all modules:
MODULES_OVERRIDE = linux acpi
Alternately, this variable lists which modules to exclude from the build process:
WITHOUT_MODULES = linux acpi sound
Additional variables are available. Refer to make.conf(5) for details.
All FreeBSD documents are available for download at http://ftp.FreeBSD.org/pub/FreeBSD/doc/
Questions that are not answered by the
documentation may be
sent to <[email protected]>.
Send questions about this document to <[email protected]>.