Hudson should report more info on a failing configure run
Often, it's not possible to debug an autoconf failure without access to the config.log. For example, the current osx ppc builder is failing and saying that the C compiler can't make executables, which seems rather unlikely.
The ideal solution would be for hudson to know that it needs to upload the config.log somehow. I don't know how to configure that, but maybe it's easy.
Failing that, we could do something like "./configure || ( cat config.log; exit 1)". That will bloat the stdout of a failing build hugely, though.