Christian Rössel wrote:
Therefore I usually specify --host *and* --build if I want to cross
compile. If $host != $build, configure sets cross_compiling to yes
Ah yes, that is an easier workaround than hacking the configure script.
However, this doesn't change the fact that there is a bug: autoconf's
detection of cross-compiling when cross_compiling=maybe should be fixed
on BlueGene. Specifying --build is only a workaround, not a fix.
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.
I'm not sure that's the right approach. The default when running
configure should be to compile for the build host (i.e., the front-end
nodes on BlueGene etc.). Also, the autoconf philosophy is to do feature
tests rather than platform-specific heuristics whenever possible.
How do the autoconf developers feel about my proposed solution, which
should allow --host to work normally on BlueGene?
Steven
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