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Re: PATCH: Update default arch for x86


On 27.02.2010 16:36, H.J. Lu wrote:
On Sat, Feb 27, 2010 at 7:33 AM, H.J. Lu<hjl.tools@gmail.com> wrote:
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


Wrong patch. Here is the updated one.

thanks! works when omitting the --with-arch-32=i486 flag, but not with it.


Matthias


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