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Re: PATCH: Update default arch for x86


On Sat, Feb 27, 2010 at 3:59 AM, Matthias Klose <doko@ubuntu.com> wrote:
> On 27.02.2010 03:14, H.J. Lu wrote:
>>
>> On Fri, Feb 26, 2010 at 5:29 PM, Jack Howarth<howarth@bromo.med.uc.edu>
>> ?wrote:
>>>
>>> On Fri, Feb 26, 2010 at 05:06:00PM -0500, Jason Merrill wrote:
>>>>
>>>> On 02/26/2010 03:56 PM, H.J. Lu wrote:
>>>>>
>>>>> Here is the updated patch to replace arch_fpmath_pentium4 with
>>>>> arch_without_sse2. ?OK to install?
>>>>
>>>> OK.
>>>>
>>>> Jason
>>>
>>> ? The current gcc trunk no longer allows darwin10 to build with the
>>> configuration...
>>>
>>> ../gcc-4.5-20100226/configure --prefix=/sw --prefix=/sw/lib/gcc4.5
>>> --mandir=/sw/share/man --infodir=/sw/share/info
>>> --enable-languages=c,c++,fortran,objc,obj-c++,java --with-gmp=/sw
>>> --with-libiconv-prefix=/sw --with-ppl=/sw --with-cloog=/sw --with-mpc=/sw
>>> --with-system-zlib --x-includes=/usr/X11R6/include
>>> --x-libraries=/usr/X11R6/lib --disable-libjava-multilib
>>> --build=i686-apple-darwin10 --host=i686-apple-darwin10
>>> --target=i686-apple-darwin10
>>>
>>> The build hangs in the x86_64 libgcc multilib subdirectory with the
>>> config.log errors there of...
>>>
>>
>> That will happen for all i[34567]86-*-* targets which also require 64bit
>> ISA.
>> This patch avoids setting the default arch if 64bit ISA is required and
>> i[34567]86-*-* targets don't support 64bit ISA.
>
> build of a biarch compiler on i486-linux-gnu fails, even with this patch
> applied:
>
> --enable-shared --enable-threads=posix --enable-targets=all
> --with-arch-32=i486 --with-tune=generic --enable-checking=yes
> --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu
>
> checking for x86_64-linux-gnu-gcc...
> /scratch/packages/gcc/4.5/u/gcc-4.5-4.5-20100227/build/./gcc/xgcc
> -B/scratch/packages/gcc/4.5/u/gcc-4.5-4.5-20100227/build/./gcc/
> -B/usr/i486-linux-gnu/bin/ -B/usr/i486-linux-gnu/lib/ -isystem
> /usr/i486-linux-gnu/include -isystem /usr/i486-linux-gnu/sys-include ?-m64
> checking for suffix of object files... configure: error: in
> `/scratch/packages/gcc/4.5/u/gcc-4.5-4.5-20100227/build/i486-linux-gnu/64/libgcc':
> configure: error: cannot compute suffix of object files: cannot compile
> See `config.log' for more details.
> make[4]: *** [configure-stage1-target-libgcc] Error 1
> make[4]: Leaving directory
> `/scratch/packages/gcc/4.5/u/gcc-4.5-4.5-20100227/build'
> make[3]: *** [stage1-bubble] Error 2
>
>
> configure:3232:
> /scratch/packages/gcc/4.5/u/gcc-4.5-4.5-20100227/build/./gcc/xgcc -
> B/scratch/packages/gcc/4.5/u/gcc-4.5-4.5-20100227/build/./gcc/
> -B/usr/i486-linux-gn
> u/bin/ -B/usr/i486-linux-gnu/lib/ -isystem /usr/i486-linux-gnu/include
> -isystem /us
> r/i486-linux-gnu/sys-include ?-m64 -c -g -O2 ?conftest.c >&5
> conftest.c:1:0: error: CPU you selected does not support x86-64 instruction
> set
> configure:3236: $? = 1
>

This patch works for me on Linux with

# .../configure --enable-targets=all i686-linux


-- 
H.J.

Attachment: gcc-arch-64bit-2.patch
Description: Text document


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