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From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Cyril Chemparathy <cchemparathy@ezchip.com>
Date: Mon, 22 Jun 2015 11:36:20 +0200
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Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v2 05/10] eal: add and use unaligned integer
	types
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2015-06-19 10:34, Cyril Chemparathy:
> On machines that are strict on pointer alignment, current code breaks
> on GCC's -Wcast-align checks on casts from narrower to wider types.
> This patch introduces new unaligned_uint(16|32|64)_t types, which
> correctly retain alignment in such cases.
[...]
> +#ifdef RTE_ARCH_STRICT_ALIGN
> +typedef uint64_t unaligned_uint64_t __attribute__ ((aligned(1)));
> +typedef uint32_t unaligned_uint32_t __attribute__ ((aligned(1)));
> +typedef uint16_t unaligned_uint16_t __attribute__ ((aligned(1)));
> +#else
> +typedef uint64_t unaligned_uint64_t;
> +typedef uint32_t unaligned_uint32_t;
> +typedef uint16_t unaligned_uint16_t;
> +#endif

CONFIG_RTE_ARCH_STRICT_ALIGN should be declared (and disabled) in config templates.