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List: gentoo-dev
Subject: Re: [gentoo-dev] [PATCH] Transitional changes to the kernel-2 eclass to support future CPU OPT
From: Ulrich Mueller <ulm () gentoo ! org>
Date: 2021-04-29 12:59:07
Message-ID: uim45b61w () gentoo ! org
[Download RAW message or body]
>>>>> On Thu, 29 Apr 2021, mpagano wrote:
> --- a/eclass/kernel-2.eclass
> +++ b/eclass/kernel-2.eclass
> @@ -1241,8 +1241,32 @@ unipatch() {
> local GCC_MAJOR_VER=$(gcc-major-version)
> local GCC_MINOR_VER=$(gcc-minor-version)
>
> - # optimization patch for gcc < 8.X and kernel > 4.13
> - if kernel_is ge 4 13 ; then
> + # this section should be the target state to handle the cpu opt
> + # patch for kernels > 4.19.189, 5.4.115, 5.10.33 and 5.11.17,
> + # 5.12.0 and gcc >= 9 The patch now handles the
> + # gcc version enabled on the system through the Kconfig file as
> + # 'depends'. The legacy section can hopefully be retired in the future
> + # Note the patch for 4.19-5.8 version are the same and the patch for
> + # 5.8+ version is the same
> + # eventually we can remove everything except the gcc ver <9 check
> + # based on stablization, time, kernel removals or a combo of all three
> + if ((kernel_is eq 4 19 && kernel_is gt 4 19 189) ||
> + (kernel_is eq 5 4 && kernel_is gt 5 4 115) ||
> + (kernel_is eq 5 10 && kernel_is gt 5 10 33) ||
> + (kernel_is eq 5 11 && kernel_is gt 5 11 17) ||
> + (kernel_is eq 5 12 && kernel_is gt 5 12 0)); then
Looks like the outermost pair of parentheses ( ) isn't needed here.
Also, when writing nested parentheses without a space, bash may
sometimes (but not always!) interpret them as an arithmetic expression.
This can cause unexpected results:
$ ((true) && (true)); echo $?
0
$ ( (true && true) ); echo $?
0
$ ((true && true)); echo $?
1
$ true=42
$ ((true && true)); echo $?
0
> [...]
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