Re: [Xen-devel] cross compiling 32 bit Xen on an x86_64 system

[Jerone Young <jyoung5@xxxxxxxxxx>]

This is a python issue that I can't see a way around. The issue you are
seeing is because we are using the setup function in "distutils.core"
module
http://python.fyxm.net/doc/2.4/dist/module-distutils.core.html
and it does not pass all the correct flags when compiling
xen/lowlevel/xc/xc.c

Here is the gcc line it comes up with:
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -m64 -
D_GNU_SOURCE -fPIC -m32 -march=i686 -fPIC -
I../../tools/python/xen/lowlevel/xu -I../../tools/libxc -
I../../tools/libxutil -I../../tools/xcs -Ixen/lowlevel/xc -
I/usr/include/python2.3 -c xen/lowlevel/xc/xc.c -o build/temp.linux-
x86_64-2.3/xen/lowlevel/xc/xc.o -fno-strict-aliasing -Wall -Werror
In file included from /usr/include/python2.3/Python.h:48,
                 from xen/lowlevel/xc/xc.c:7:
/usr/include/python2.3/pyport.h:554:2: #error "LONG_BIT definition
appears wrong for platform (bad gcc/glibc config?).

You will notice both "-m64" & "-m32 -march=i686" ("-m32 & -march=i686"
are the CFLAGS we are specifying). This is were the problem is. The
first set of CFLAGS with "-m64" are assumed by python.

On a normal x86-64 compile you get: 
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -m64 -
D_GNU_SOURCE -fPIC -m64 -fPIC -I../../tools/python/xen/lowlevel/xu -
I../../tools/libxc -I../../tools/libxutil -I../../tools/xcs -
Ixen/lowlevel/xc -I/usr/include/python2.3 -c xen/lowlevel/xc/xc.c -o
build/temp.linux-x86_64-2.3/xen/lowlevel/xc/xc.o -fno-strict-aliasing -
Wall -Werror

So it's figuring out where python is getting these CFLAGS.


On Mon, 2005-03-21 at 15:37 -0500, Subrahmanian, Raj wrote:
> All,
> 
> I am trying to cross-compile 32 Xen on my x86_64 box.
> 
> I turned on XEN_TARGET_ARCH=x86_32
> 
> There are problems with incompatible header files while compiling the python 
> subdirectory. 
> Is anyone else running into similar problems? 
> 
> thanks
> Raj
> 
> 
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-- 
Jerone Young
IBM Linux Technology Center
jyoung5@xxxxxxxxxx
512-838-1157 (T/L: 678-1157)



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