Re: Re: Cross compiling when in fact we aren't

[Balint Joo]

onic name of whatever platform name you give it as an
> argument, e.g.
> $ sh config.sub powerpc-ibm-aix5.1.0.0
> powerpc-ibm-aix5.1.0.0
> $ sh config.sub powerpc-ibm-aix5.1.0
> powerpc-ibm-aix5.1.0
> Now what, these two are "literally" different platforms,
> ye know... :-)=)
>
> have fun,
> -- guido                                  http://AC-Archive.sf.net
> GCS/E/S/P C++/++++$ ULHS L++w- N++@ d(+-) s+a- r+@>+++ y++ 5++X-

Thanks Guido! This will do the trick for sure.

However, this is where the discussion gets theological,
or potentially even philosophical Although
the two platforms are now different this is still just a beastly hack,
a trick as it were.

It does not address in a <em>nice</em> way the issue that you may want to do a 
native build with no executable checks, for whatever reason.

If I were to put in documentation:

"On such a machine compile with

CC=mpcc ./configure --host=powerpc-ibm-aix5.1.0.0 \
                    --build=powerpc-ibm-aix5.1.0        "

A user may well be not unreasonable in thinking I made a typo,
and unwittingly correct my 'mistake'. He/She will then be sorely disappointed.
If he/she is not so savvy, he/she may still wonder about the difference.
(Of course I could document that it is a hack and thus turn it into
a feature perhaps even an endearing quirk)

Admittedly it does use both --host and --build options so it is
more blessed than just using --host. However it still fails to
satisfy completely.

        Any other offers?

        This is an amusing problem :)

        B

PS: There used to be a concept of making a code 'cross compilable'
so you can build it on a 'compile server'. This is a similar idea.
The single node version is a 'compile server' for the parallel machine.

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Dr Balint Joo                         Post Doctoral Research Fellow
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