[PATCH kexec-tools] arm: do not build iomem.o target with no soruce

[Pratyush Anand]

On Friday 09 December 2016 02:42 PM, Simon Horman wrote:
> Header files should be added to the distribution but not
> used to derive targets for compilation. In this an attempt was
> made to build iomem.o, but iomem.c does not exist so this fails.
>
> Fixes: 1574ff1aae4f ("arm: include phys_to_virt.h and iomem.h in distribution")
> Cc: Dave Young <dyoung at redhat.com>
> Signed-off-by: Simon Horman <horms at verge.net.au>
> ---
>  kexec/arch/arm/Makefile | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/kexec/arch/arm/Makefile b/kexec/arch/arm/Makefile
> index 871979e0ae26..a1b730034de8 100644
> --- a/kexec/arch/arm/Makefile
> +++ b/kexec/arch/arm/Makefile
> @@ -27,9 +27,9 @@ arm_KEXEC_SRCS += $(libfdt_SRCS)
>
>  arm_UIMAGE = kexec/kexec-uImage.c
>  arm_PHYS_TO_VIRT = kexec/arch/arm/phys_to_virt.c
> -arm_PHYS_TO_VIRT += kexec/arch/arm/iomem.h
> -arm_PHYS_TO_VIRT += kexec/arch/arm/phys_to_virt.h
> +arm_PHYS_TO_VIRT_INCLUDE = kexec/arch/arm/iomem.h
> +arm_PHYS_TO_VIRT_INCLUDE += kexec/arch/arm/phys_to_virt.h

Since they are needed only in dist definition, so probably we could have 
avoided to define arm_PHYS_TO_VIRT_INCLUDE  and could have added these 
files directly to dist. It will keep it similar like other makefiles 
(kexec/arch/x86_64/Makefile)

>
>  dist += kexec/arch/arm/Makefile $(arm_KEXEC_SRCS) $(arm_PHYS_TO_VIRT)	\
> -	kexec/arch/arm/crashdump-arm.h kexec/arch/arm/kexec-arm.h	\
> -	kexec/arch/arm/include/arch/options.h
> +	$(arm_PHYS_TO_VIRT_INCLUDE) kexec/arch/arm/crashdump-arm.h \
> +	kexec/arch/arm/kexec-arm.h kexec/arch/arm/include/arch/options.h
>

Otherwise, changes looks fine to me.


~Pratyush