Re: [PATCH] ARC: build: Try to guess CROSS_COMPILE with cc-cross-prefix

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Hi Alexey,

On Mon, Jun 3, 2019 at 5:34 PM Alexey Brodkin
<Alexey.Brodkin@xxxxxxxxxxxx> wrote:
>
> Hi Masahiro-san,
>
> > -----Original Message-----
> > From: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
> > Sent: Monday, June 3, 2019 11:18 AM
> > To: Alexey Brodkin <abrodkin@xxxxxxxxxxxx>
> > Cc: arcml <linux-snps-arc@xxxxxxxxxxxxxxxxxxx>; Linux Kernel Mailing List <linux-
> > kernel@xxxxxxxxxxxxxxx>; Vineet Gupta <Vineet.Gupta1@xxxxxxxxxxxx>
> > Subject: Re: [PATCH] ARC: build: Try to guess CROSS_COMPILE with cc-cross-prefix
> >
> > Hi Alexey,
> >
> > On Mon, Jun 3, 2019 at 3:42 PM Alexey Brodkin
> > <Alexey.Brodkin@xxxxxxxxxxxx> wrote:
>
> [snip]
>
> > > A side note: even though "cc-cross-prefix" does its job it pollutes
> > > console with output of "which" for all the prefixes it didn't manage to find
> > > a matching cross-compiler for like that:
> > > | # ARCH=arc make defconfig
> > > | which: no arceb-linux-gcc in (~/.local/bin:~/bin:/usr/bin:/usr/sbin)
> > > | *** Default configuration is based on 'nsim_hs_defconfig'
> >
> >
> > Oh really?
> >
> > masahiro@pug:~$ which arc-linux-gcc
> > /home/masahiro/tools/arc/bin/arc-linux-gcc
> > masahiro@pug:~$ which dummy-linux-gcc
> > masahiro@pug:~$ echo $?
> > 1
> >
> >
> > When 'which' cannot find the given command,
> > it does not print anything to stderr.
> >
> > Does it work differently on your machine?
>
> Well on Ubuntu 18.04 indeed which doesn't show anything
> but on my build-server with CentOS 7 I'm getting mentioned verbose output:
> | # cat /etc/redhat-release
> | CentOS Linux release 7.3.1611 (Core)
>
> | # /usr/bin/which -v
> | GNU which v2.20, Copyright (C) 1999 - 2008 Carlo Wood.
> | GNU which comes with ABSOLUTELY NO WARRANTY;
> | This program is free software; your freedom to use, change
> | and distribute this program is protected by the GPL.


OK, confirmed.

Probably using 'which' is a bad idea
since this is not portable.

I will send a fix-up patch soon.



-- 
Best Regards
Masahiro Yamada

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