path: root/README.qemu
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authorBruce Ashfield <bruce.ashfield@windriver.com>2018-08-18 22:50:44 -0400
committerRichard Purdie <richard.purdie@linuxfoundation.org>2018-08-19 16:33:41 +0100
commit007ef1f468110b2698a27ea9a6d43fed5a0a9fc2 (patch)
tree0309271158ce32a3164e99017cc37a8aa228b138 /README.qemu
parent0d19caefeeca14f44c80ccb716c30b17f14255a5 (diff)
kernel-devsrc: restructure for out of tree (and on target) module buildsHEADmaster
The existing kernel-devsrc package starts with a full copy of the kernel source and then starts to strip out elements that are not required. This results in extra time (I/O) and extra space being taken up in the final package. The main purpose of the kernel-devsrc package has been to build modules against the running kernel, not to include a full copy of the source code for re-building the kernel. The end result was a 600M kernel-devsrc package. This restructuring of the package uses an approach similar to other distros, where the kernel-devsrc package is for building against the running kernel and uses a curated set of copied infrastructure, versus a mass copy of the entire kernel. The differences in this approach versus other is largely due to the architecture support and the split build/source directory of the kernel. The result is a kernel-devsrc package of about 10M, which is capable of running "make scripts" and compiling kernel modules against the running kernel. Along with the changes to the copying of the infrascture, we also have the following changes: - a better/more explicit listing of dependencies for on-target builds of "make scripts" or "make modules_prepare" - The kernel source is installed into /lib/modules/<version>/build and a symlink created from /usr/src/kernel to the new location. This aligns with the standard location for module support code - There is also a symlink from /lib/modules/<version>/source -> build to reserve a spot for a new package that is simply the kernel source. That package is not part of this update. Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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