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From: Thomas Monjalon <thomas@monjalon.net>
To: Andrew Rybchenko <arybchenko@solarflare.com>
Cc: dev@dpdk.org, Neil Horman <nhorman@tuxdriver.com>
Date: Tue, 06 Feb 2018 01:19:35 +0100
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Subject: Re: [dpdk-dev] [PATCH] buildtools: output build failure reason to
	stderr
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01/02/2018 14:49, Andrew Rybchenko:
> -		echo "$SYM is not flagged as experimental"
> -		echo "but is listed in version map"
> -		echo "Please add __rte_experimental to the definition of $SYM"
> +		cat >&2 <<EOM
> +$SYM is not flagged as experimental
> +but is listed in version map
> +Please add __rte_experimental to the definition of $SYM
> +EOM

You could use <<- EOM and keep indentation of the message.
You can check how it's done in devtools scripts.