linux-kernel - Re: [PATCH] scripts/gcc-version.sh: handle CC="gcc -m32"

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Date:	Fri, 03 Jan 2014 21:34:34 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Rusty Russell <rusty@...tcorp.com.au>,
	LKML <linux-kernel@...r.kernel.org>
CC:	linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] scripts/gcc-version.sh: handle CC="gcc -m32"

On 3.1.2014 18:10, Michal Marek wrote:
> On 2013-12-10 08:13, Rusty Russell wrote:
>> Without it we get ugly warnings (though build still succeeds).
>>
>> $ make -j8 CC="gcc -m32"
>> In file included from <command-line>:0:0:
>> /usr/include/stdc-predef.h:30:26: fatal error: bits/predefs.h: No such file or directory
>>  #include <bits/predefs.h>
>>                           ^
>> compilation terminated.
>> In file included from <command-line>:0:0:
>> /usr/include/stdc-predef.h:30:26: fatal error: bits/predefs.h: No such file or directory
>>  #include <bits/predefs.h>
>>                           ^
>> compilation terminated.
>> /home/rusty/devel/kernel/linux/scripts/gcc-version.sh: line 31: printf: #: invalid number
>> /home/rusty/devel/kernel/linux/scripts/gcc-version.sh: line 31: printf: #: invalid number
>> /bin/sh: 1: [: 0001: unexpected operator
>>   CHK     include/config/kernel.release
>>   CHK     include/generated/uapi/linux/version.h
>> make[1]: Nothing to be done for `all'.
>> ...
>>
>> Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
>>
>> diff --git a/scripts/gcc-version.sh b/scripts/gcc-version.sh
>> index 7f2126df91f2..d48b0cbaf246 100644
>> --- a/scripts/gcc-version.sh
>> +++ b/scripts/gcc-version.sh
>> @@ -14,7 +14,7 @@ if [ "$1" = "-p" ] ; then
>>  	shift;
>>  fi
>>  
>> -compiler="$*"
>> +compiler="$1"
> 
> But this will break things like CC="ccache gcc". Your problem is that
> you do not have the 32bit glibc headers, right?

BTW, what is the usecase for CC="gcc -m32"? AFAICS, at least x86 and
powerpc do this for you when building a 32bit kernel.

Thanks,
Michal

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