Fwd: Compile for different machine

[Sergey Ivanov <icegood1980 at gmail dot com>]

Sorry for double, forget send to gcc-help...

---------- Forwarded message ----------
From: Sergey Ivanov <icegood1980@gmail.com>
Date: 2012/9/27
Subject: Re: Compile for different machine
To: Marcin Mirosław <marcin@mejor.pl>


2012/9/27 Marcin Mirosław <marcin@mejor.pl>:
> W dniu 27.09.2012 15:28, Sergey Ivanov pisze:
>> Tried to compile code for i686 instructions set under my AMD x64 in gcc 4.6.
>> Specified -march=i686.
>> Obtained "error: CPU you selected does not support x86-64 instruction set"
>> Why?
>> Full options line is:
>> export CC=$(compiler) -O3 -finline-limit=100000 --param
>> inline-unit-growth=10000 --param large-function-growth=100000 \
>>   --param large-function-insns=47000 -march=i686 -Wall
>> -Wno-format-security $(GCC_VER_MORE_45_NO_UNUSED_RET) --param
>> large-stack-frame=65536 \
>>   --param large-stack-frame-growth=3000 $(explicit_templates) -pg
>>
>
> Hi,
> maybe with "-m32" it will work better?
> Regards.
>
With m32 doesn't work with other reason:

ice@ubuntu:~/science/trunk/main/monte_carlo_offlattice_moldyn/src$ make
In file included from
/usr/include/c++/4.6/x86_64-linux-gnu/32/bits/os_defines.h:40:0,
                 from
/usr/include/c++/4.6/x86_64-linux-gnu/32/bits/c++config.h:393,
                 from /usr/include/c++/4.6/cstdio:43,
                 from Exception.cpp:4:
/usr/include/features.h:324:26: fatal error: bits/predefs.h: No such
file or directory
compilation terminated.

Seems headers for 32bit environment are wrong. What should i do to
make them better?
1)
uname -a
Linux ubuntu 3.2.0-31-generic #50-Ubuntu SMP Fri Sep 7 16:16:45 UTC
2012 x86_64 x86_64 x86_64 GNU/Linux
2) gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.6.3-1ubuntu5'
--with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-gnu-unique-object --enable-plugin --enable-objc-gc
--disable-werror --with-arch-32=i686 --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)

--
Kind regards,
Sergey Ivanov


-- 
Kind regards,
Sergey Ivanov