linux-kernel - Re: [PATCH] selftests: find echo binary to use -ne options

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Date:   Fri, 3 Feb 2023 09:26:36 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Guillaume Tucker <guillaume.tucker@...labora.com>,
        Guillaume Tucker <guillaume.tucker@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Gautam <gautammenghani201@...il.com>
Cc:     kernel@...labora.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernelci@...ts.linux.dev,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] selftests: find echo binary to use -ne options

On 2/3/23 08:26, Guillaume Tucker wrote:
> Find the actual echo binary using $(which echo) and use it for
> formatted output with -ne.  On some systems, the default echo command
> doesn't handle the -e option and the output looks like this (arm64
> build):
> 
> -ne Emit Tests for alsa
> 
> -ne Emit Tests for amd-pstate
> 
> -ne Emit Tests for arm64
> 
> This is for example the case with the KernelCI Docker images
> e.g. kernelci/gcc-10:x86-kselftest-kernelci.  With the actual echo
> binary (e.g. in /bin/echo), the output is formatted as expected (x86
> build this time):
> 
> Emit Tests for alsa
> Emit Tests for amd-pstate
> Skipping non-existent dir: arm64
> 
> Only the install target is using "echo -ne" so keep the $ECHO variable
> local to it.
> 
> Reported-by: "kernelci.org bot" <bot@...nelci.org>
> Fixes: 3297a4df805d ("kselftests: Enable the echo command to print newlines in Makefile")
> Signed-off-by: Guillaume Tucker <guillaume.tucker@...labora.com>
> ---

Thank you - will appear shortly in linuxk-selftest next.

thanks,
-- Shuah