lkml.org 
[lkml]   [2014]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] scripts/gcc-version.sh: handle CC="gcc -m32"
Date
Michal Marek <mmarek@suse.cz> writes:
> 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@rustcorp.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.

No, without -m32 I get:

$ make
make[1]: Nothing to be done for `all'.
make[1]: Nothing to be done for `relocs'.
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
CC kernel/bounds.s
gcc: warning: ‘-mcpu=’ is deprecated; use ‘-mtune=’ or ‘-march=’ instead
gcc: warning: ‘-mcpu=’ is deprecated; use ‘-mtune=’ or ‘-march=’ instead
kernel/bounds.c:1:0: error: CPU you selected does not support x86-64 instruction set
/*
^
kernel/bounds.c:1:0: warning: -mregparm is ignored in 64-bit mode [enabled by default]
make[1]: *** [kernel/bounds.s] Error 1
make: *** [prepare0] Error 2

If that's *supposed* to work, then the bug is elsewhere.

Cheers,
Rusty.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2014-01-15 23:41    [W:0.090 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site