cd785c1b34
Add support for "local" modules. By default, these modules are located in LOCALBASE/sys/modules (where LOCALBASE defaults to /usr/local). Individual modules can be built along with a kernel by defining LOCAL_MODULES to the list of modules. Each is assumed to be a subdirectory containing a valid Makefile. If LOCAL_MODULES is not specified, all of the modules present in LOCALBASE/sys/modules are built and installed along with the kernel. This means that a port that installs a kernel module can choose to install its source along with a suitable Makefile to /usr/local/sys/modules/<foo>. Future kernel builds will then include that kernel module using the kernel configuration's opt_*.h headers and install it into /boot/kernel along with other kernel-specific modules. This is not trying to solve the issue of folks running GENERIC release kernels, but is instead aimed at folks who build their own kernels. For those folks this ensures that kernel modules from ports will always be using the right KBI, etc. This includes folks running any KBI-breaking kernel configs (such as PAE). There are still some kinks to be worked out with cross-building (we probably shouldn't include local modules in cross-built kernels by default), but this is a sufficient starting point. Reviewed by: imp MFC after: 3 months Relnotes: yes Differential Revision: https://reviews.freebsd.org/D16966
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