Heikki Lindholm wrote:
> Jan Kiszka kirjoitti:
> > Heikki Lindholm wrote:
> >
> >>Jan Kiszka kirjoitti:
> >>
> >>
> >>>Hi,
> >>>
> >>>I'm dumb x86 user who unfortunately just seem to have tumbled in the
> >>>cross-compilation trap: I'm trying to generate i586 code on a fancy new
> >>>and fast x86_64 compilation host. I got the kernel compiled with
> >>>ARCH=i386, using only the pre-installed compiler (i.e. no dedicated
> >>>cross tool chain), but I failed to compile xenomai against that kernel
> >>>in the following. Which magic switch do I have to apply and where?
> >>
> >>
> >>As dumb a guess: -m32 compiler switch?
> >>
> >
> >
> > Yes, I know, that would help. But where to feed this argument into the
> > build system?
>
> I would try makefile (and perhaps config/kconfig/Makefile*) and command
> line 'CC="gcc -m32" CXX="gcc -m32" make menuconfig/install' to be sure.
When using autoconf, you are not supposed to pass compiler flags in
CC, CFLAGS and CXXFLAGS are made for that... and the build system is
supposed to only touch AM_CFLAGS, so that CFLAGS is let for users, but I
am pretty sure this does not work with Xenomai, since we never tried :-)
As for the compilation for pentium on an x86_64, isn't there any
i686-linux-gcc that directly cross compiles for ia32 ?
If not, would not the following wrapper do the trick ?
#! /bin/sh
exec `expr "$0" : 'i686-linux-\(.*\)'` -m32r ${1+"$@"}
It should work with most build systems...
--
Gilles Chanteperdrix.
