[Bug 1671246] Re: kexec-tools does not build for armhf

[Chris J Arges]

This upload is waiting on verification of bug 1663400 and bug 1661363
before this version can make it into -proposed. Thanks.

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Title:
  kexec-tools does not build for armhf

Status in kexec-tools package in Ubuntu:
  Invalid
Status in kexec-tools source package in Xenial:
  In Progress
Status in kexec-tools source package in Yakkety:
  In Progress

Bug description:
  [Impact]
  On armhf system kexec build fails as follows:
  gcc -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fno-strict-aliasing -Wall -Wstrict-prototypes -Wdate-time -D_FORTIFY_SOURCE=2 -I./include -I./util_lib/include -Iinclude/ -I./kexec/libfdt -I./kexec/arch/arm/include  -c -MD -o kexec/arch/arm/phys_to_virt.o kexec/arch/arm/phys_to_virt.c
  make[1]: *** No rule to make target 'kexec/arch/arm/iomem.o', needed by 'build/sbin/kexec'.  Stop.

  The fix for this issue is already upstream:

  From c901bae8683c59a7bc002bd6a1e3e4b6b7d9c5f1 Mon Sep 17 00:00:00 2001
  From: Simon Horman <horms at verge.net.au>
  Date: Fri, 9 Dec 2016 10:10:49 +0100
  Subject: [PATCH] arm: do not build iomem.o target with no soruce

  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")
  Signed-off-by: Simon Horman <horms at verge.net.au>
  Reviewed-by: Pratyush Anand <panand at redhat.com>

  [Test Case]
  Build kexec-tools package from Xenial/Yakkety source in armhf system.

  [Regression Potential]
  Since patch is confined to arm there is a low overall risk of regression

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