Re: autoconf and cross-compiling?

[Dan Kegel <dank@kegel.com>]

Someone wrote:
> This helps in some situations, but does  only  part  of  the  job  in
> others.  In general, autoconf/automake based stuff will fail to build
> more or less completely when it comes to situations where it tries to
> get information of the (supposed target) system by trying to run some
> test programs.
>
> Either it uses the cross compiler to build the test programs - the it
> dies because these programs cannot be run on the host system;  or  it
> uses  the native compiler and it dies later (sometimes REALLY late on
> the target) because it gathers information from the build host  which
> does  not apply on the target (simple case: getting information about
> endianess when building on a x86 host for a PPC target).
> ...
> There was another posting about this issue by Magnus Damm, see
> http://lists.linuxppc.org/linuxppc-embedded/200109/msg00355.html

Thanks for the link!

I believe there's a fix for the endian problem; see
http://www.gnu.org/software/ac-archive/Cross_Compilation/ac_c_bigendian_cross.html

A similar approch should work for sizeof, shouldn't it?

Don't know about the other ones, like fork etc. :-(

- Dan

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