linux-kernel - Re: [PATCH] arch: avr32: Makefile: add '-D__linux_

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Date:	Sat, 01 Feb 2014 21:46:15 +0800
From:	Chen Gang <gang.chen.5i5j@...il.com>
To:	Richard Weinberger <richard.weinberger@...il.com>
CC:	hskinnemoen@...il.com, egtvedt@...fundet.no,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arch: avr32: Makefile: add '-D__linux__' flag for gcc-4.4.7
 using.

On 02/01/2014 08:56 PM, Richard Weinberger wrote:
> On Sat, Feb 1, 2014 at 1:35 PM, Chen Gang <gang.chen.5i5j@...il.com> wrote:
>> For avr32 cross compiler, do not define '__linux__' internally, so it
>> will cause issue with allmodconfig.
> 
> Isn't this a toolchain bug?

Hmm... for me, it is not toolchain's bug, it is a feature issue in gcc
old version, and in newer version it is OK (in my memory, after gcc-4.7,
it is OK).

In our "arch/*", really contents some another architectures which
already use "-D__linux__" in their "Makefile". :-)

Thanks.

> 
>> The related error:
>>
>>     CC [M]  fs/coda/psdev.o
>>   In file included from include/linux/coda.h:64,
>>                    from fs/coda/psdev.c:45:
>>   include/uapi/linux/coda.h:221: error: expected specifier-qualifier-list before 'u_quad_t'
>>
>> The related toolchain version (which only download, not re-compile):
>>
>>   [root@...en linux-next]# /upstream/toolchain/download/avr32-gnu-toolchain-linux_x86/bin/avr32-gcc -v
>>   Using built-in specs.
>>   Target: avr32
>>   Configured with: /data2/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/src/gcc/configure --target=avr32 --host=i686-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86 --enable-languages=c,c++ --disable-nls --disable-libssp --disable-libstdcxx-pch --with-dwarf2 --enable-version-specific-runtime-libs --disable-shared --enable-doc --with-mpfr-lib=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86/lib --with-mpfr-include=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86/include --with-gmp=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86 --with-mpc=/home/toolsbuild/jenkins-knuth/workspace/avr32-gnu-toolchain/avr32-gnu-toolchain-linux_x86 --enable-__cxa_atexit --disable-shared --with-newlib --with-pkgversion=AVR_32_bit_GNU_Toolchain_3.4.2_435 --with-bugurl=http://
www
>> .atmel.com/avr
>>   Thread model: single
>>   gcc version 4.4.7 (AVR_32_bit_GNU_Toolchain_3.4.2_435)
>>
>>
>> Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>
>> ---
>>  arch/avr32/Makefile | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/avr32/Makefile b/arch/avr32/Makefile
>> index 22fb665..dba48a5 100644
>> --- a/arch/avr32/Makefile
>> +++ b/arch/avr32/Makefile
>> @@ -11,7 +11,7 @@ all: uImage vmlinux.elf
>>
>>  KBUILD_DEFCONFIG       := atstk1002_defconfig
>>
>> -KBUILD_CFLAGS  += -pipe -fno-builtin -mno-pic
>> +KBUILD_CFLAGS  += -pipe -fno-builtin -mno-pic -D__linux__
>>  KBUILD_AFLAGS  += -mrelax -mno-pic
>>  KBUILD_CFLAGS_MODULE += -mno-relax
>>  LDFLAGS_vmlinux        += --relax
>> --
>> 1.7.11.7
>> --
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> 
> 
> 


-- 
Chen Gang

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