linux-kernel - Re: [PATCH 3.13 028/172] avr32: Makefile: add -D__linux_

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Date:	Wed, 05 Mar 2014 10:18:19 +0800
From:	Chen Gang <gang.chen.5i5j@...il.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
CC:	stable@...r.kernel.org, Hans-Christian Egtvedt <hegtvedt@...co.com>
Subject: Re: [PATCH 3.13 028/172] avr32: Makefile: add -D__linux__ flag for
 gcc-4.4.7 use


OK, thanks.

I am analysing how to compile avr32-linux cross-compiler (originally, I
compiled the kernel with avr32 cross-compiler which will report various
issues).

At present, I have get all related source code, and try to compile
manually. I am just analysing 2 issues now:

 - how to generate "eavr32linux.c" (it need be generated by templ file).

 - why libgcc and gcc extra "*.o" files do not match with each other.

These issues are not quite complex to me, but really need some time
resource.


Welcome any suggestions, discussions and completions.

Thanks.

On 03/05/2014 04:01 AM, Greg Kroah-Hartman wrote:
> 3.13-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Chen Gang <gang.chen.5i5j@...il.com>
> 
> commit 8d80390cfc9434d5aa4fb9e5f9768a66b30cb8a6 upstream.
> 
> For avr32 cross compiler, do not define '__linux__' internally, so it
> will cause issue with allmodconfig.
> 
> 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>
> Acked-by: Hans-Christian Egtvedt <hegtvedt@...co.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 
> ---
>  arch/avr32/Makefile |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- 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
> 
> 

-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed
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