Ralf Wildenhues schrieb:
Hello Christian,
sorry, I saw your mail only after sending my other.
* Christian Rössel wrote on Sat, Jun 06, 2009 at 08:19:08AM CEST:
Note that we are working on some heuristics to detect supercomputer
platforms like Blue Gene, Cray, NEC etc. that require cross compilation.
This detection will be available as a macro soon and render it
unnecessary that the user specifies --host and --build on the supported
platforms.
Unless those heuristics extend to other platforms as well, we will have
at least a bit of a hard time accepting them into Autoconf proper (if
that's what you're aiming for), because in the long run, even just
enumerating all the cross compilation systems will be a burden for
Autoconf.
Hi Ralf,
at the moment I'm just thinking of an external macro that sets $host if
it is not set by the user. Depending on $cpu and $os of the build system
you check for some special directories (e.g. /bgsys for Blue Gene/P).
Usually todays supercomputers have such special and distinct
directories. This is not the holy grail but works quite reliable for us.
I think that these heuristics is not general and reliable enough to be
included in autoconf/config.guess, therefore I'm thinking of providing a
macro at http://www.nongnu.org/autoconf-archive/ e.g.
Cheers,
Christian
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