Re: [Xen-devel] [PATCH] Add -MP to CFLAGS along with -MMD.

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 17/03/2020 14:34, David Woodhouse wrote:
> From: David Woodhouse <dwmw@xxxxxxxxxxxx>
>
> This causes gcc (yes, and clang) to emit phony targets for each dependency.
>
> This means that when a header file is deleted, the C files which *used*
> to include it will no longer stop building with bogus out-of-date
> dependencies like this:
>
>   make[5]: *** No rule to make target
>   '/home/dwmw2/git/xen/xen/include/asm/hvm/svm/amd-iommu-proto.h',
>   needed by 'p2m.o'. Stop.
>
> Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>

Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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