[CMake] Compiling x86 executable on amd64

[Mathieu Malaterre]

John,

On Fri, May 2, 2008 at 8:11 PM, John Doe <ufnoise at gmail.com> wrote:
>
> On Fri, May 2, 2008 at 12:54 PM, Mathieu Malaterre
>  <mathieu.malaterre at gmail.com> wrote:
>  > Hi there,
>  >
>  >   Not really a cmake issue, but people maybe know the answer here...
>  >  1.
>  >   I am trying to generate package for x86 linux platform, since I have
>  >  all the multilib (lib32 thingy) I thought this should be trivial to
>  >  cross compile for this target (this is not a true cross compilation as
>  >  the target can be run on the host sytem).
>  >
>  >  2.
>  >   What are the gcc flags to use the older glibc symbol so that I don't
>  >  get report of people telling: I cannot run your executable it says:
>  >
>  >   libstdc++.so.6: version `GLIBCXX_3.4.9' not found
>
>  As far as I know you can't.

=O ... of course you can. How do you think cmake binaries is working
on all kind of linux system, and even on my amd64 system via the i32
layer.

>  Options:
>  1. Give them a copy of your libstdc++.so.6 (find with "libstdc++.so.6)
>  and use LD_LIBRARY_PATH or LD_PRELOAD to tell where it is.

I am talking about packaging here. Shipping a libstdc++.6 that could
potentially override my user libstdc++ is clearly a real bad *bad*
idea !

>  2. Tell them to use the same os as you.

...seriously. Are you some kind of Microsoft spy ? What I am asking is
trivial stuff, just cannot find the documentation. One straight
solution is get an old linux box myself and compile my package on
it... I do not have a spare box for that, nor do I want to do that.

>  3. Create some sort of chroot system to replicate all of their system libraries.

I was thinking that maybe runing vmware in XEN, in another system
emulation could be even better ...

>  4. Give them the source code.

make package != make package_source.

I know how to build source package. But you cannot seriously ask a
simple user to build an app like paraview to open a vtk file and then
never use paraview again ...

If I cannot get anything more usefull, I'll switch to using gcc 3.4.0
which is the oldest AFAIK wich implement CXX=ABI 2 for g++. I still
prefer my g++4.3 (better compilation time, better optimization...).

-- 
Mathieu