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Date: Mon, 26 Oct 2015 17:22:30 +0100
From: Jan Viktorin <viktorin@rehivetech.com>
To: David Hunt <david.hunt@intel.com>
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Cc: dev@dpdk.org, Benjamin Boren <Ben.Boren@intel.com>
Subject: Re: [dpdk-dev] [PATCH 10/11] mk: add makefile and config changes
 for armv8 architecture
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On Fri, 23 Oct 2015 15:17:12 +0100
David Hunt <david.hunt@intel.com> wrote:

> +#     in machine .mk)
> +#   - define CPU_CFLAGS variable (overridden by cmdline or previous
> +#     define in machine .mk)
> +#   - define CPU_LDFLAGS variable (overridden by cmdline or previous
> +#     define in machine .mk)
> +#   - define CPU_ASFLAGS variable (overridden by cmdline or previous
> +#     define in machine .mk)
> +#   - may override any previously defined variable
> +#
> +# examples for CONFIG_RTE_ARCH: i686, x86_64, x86_64_32
> +#
> +
> +ARCH  ?= arm64
> +# common arch dir in eal headers
> +ARCH_DIR := arm64
> +CROSS ?=
> +
> +CPU_CFLAGS  ?= -flax-vector-conversions

What is the purpose of this flag?

from man gcc:

-flax-vector-conversions
  Allow implicit conversions between vectors with differing numbers of
  elements and/or incompatible element types. 
  This option should not be used for new code.
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Jan

> +CPU_LDFLAGS ?=
> +CPU_ASFLAGS ?=
> +
> +export ARCH CROSS CPU_CFLAGS CPU_LDFLAGS CPU_ASFLAGS


-- 
   Jan Viktorin                  E-mail: Viktorin@RehiveTech.com
   System Architect              Web:    www.RehiveTech.com
   RehiveTech
   Brno, Czech Republic