[PATCH] Makefile: Handle building in a very old build directory

[Tom Rini]

On Thu, May 06, 2021 at 07:32:23PM -0600, Simon Glass wrote:

> Versions of U-Boot before 2014.01 created a symlink from include/asm to
> the architecture-specific header directory.
> 
> If an ARM board is build with that old version, then sandbox is built on
> a more recent version (both with in-tree builds), the include/asm symlink
> confuses the build system. It picks up the ARM headers when it should be
> using the sandbox ones.
> 
> Since 2014 U-Boot has only created a symlink inside the include/asm/
> directory and only for out-of-tree builds. So for in-tree builds it does
> not expect to see an include/asm symlink. It is not removed by
> 'make mrproper'. It does show up with 'git status' but is easy enough to
> miss.
> 
> Add include/asm to the files to remove with 'make mkproper'. For recent
> U-Boot builds this has no effect, since include/asm is a directory, not a
> file. If the include/asm symlink is there, it will be removed.
> 
> Reported-by: Marek Szyprowski <m.szyprowski at samsung.com>
> Signed-off-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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