[dpdk-dev] [PATCH] kernel/linux: fix modules install path

[Bruce Richardson]

On Mon, Jun 10, 2019 at 02:04:26PM +0300, Igor Ryzhov wrote:
>    Bruce,
>    From my understanding, kernel_dir is a directory with kernel headers
>    needed
>    for modules building. 

Right now, yes. I'd suggest that we change that to the actual kernel
modules directory, and we get both the build directory and the install
directory based off that.

>    When it's formed automatically, yes, it will be
>    "/lib/modules/version/build" and we can get installation directory by
>    stripping
>    "/build".

Well, I'd suggest if we query the value automatically we don't both adding
the build, and just add that later when building the modules, i.e.
kernel_dir should always be the the base directory without "build" on it.

>  But when it's set manually, it can be set to, for example,
>    "/usr/src/linux-headers-version", and build will be successful, but we
>    won't be
>    able to strip "/build" as there is no "/build".
>    Which path should be used for installation in cross-compile case, when
>    the
>    kernel_dir is set manually?

The stripping "build" was just a suggestion to allow the value to be
specified either with or without the "build/" suffix and have things work.
For the paths specified in the cross-compile case, my thinking was that we
would: 
* build using <kernel_dir>/build
* install to <kernel_dir>/extra/dpdk

as with the non-cross-compile case.

/Bruce