linux-kernel - Re: [PATCH] scripts/gcc-goto.sh: Show stdout and stderr for potential errors

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Date:   Mon, 17 Sep 2018 17:43:47 +0800
From:   He Zhe <zhe.he@...driver.com>
To:     <tglx@...utronix.de>, <kstewart@...uxfoundation.org>,
        <pombredanne@...b.com>, <gregkh@...uxfoundation.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] scripts/gcc-goto.sh: Show stdout and stderr for potential
 errors

May I have your input?

Thanks,
Zhe

On 2018年08月09日 16:34, zhe.he@...driver.com wrote:
> From: He Zhe <zhe.he@...driver.com>
>
> The check may fail not only because ${CC} does not support the asm
> feature, but also due to potential defects of ${CC} itself like what
> we experienced below or even it's missing.
>
> Assembler messages:
> Fatal error: The input and output files must be distinct
> (introduced by binutils-2.31 "Stop the assembler from overwriting its
> output file.")
>
> This patch enables stdout and stderr to give user direct error
> information for those cases, while not polluting the output for normal
> cases.
>
> Signed-off-by: He Zhe <zhe.he@...driver.com>
> ---
>  scripts/gcc-goto.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/gcc-goto.sh b/scripts/gcc-goto.sh
> index 083c526..bd7fc8eb 100755
> --- a/scripts/gcc-goto.sh
> +++ b/scripts/gcc-goto.sh
> @@ -3,7 +3,7 @@
>  # Test for gcc 'asm goto' support
>  # Copyright (C) 2010, Jason Baron <jbaron@...hat.com>
>  
> -cat << "END" | $@ -x c - -c -o /dev/null >/dev/null 2>&1 && echo "y"
> +cat << "END" | $@ -x c - -c -o /dev/null && echo "y"
>  int main(void)
>  {
>  #if defined(__arm__) || defined(__aarch64__)