Hi,
This patch allows configuration for multiple targets, like: ./config/scripts/switch-arch amd64 cross-ppc cross-sparc32 cross-sparc64 cross-x86
The command creates directories (obj-amd64 obj-ppc obj-sparc32 obj-sparc64 obj-x86), Makefiles and other config stuff. To build all configured targets, use: make build or make build-verbose
The benefit is that after a change to a file that affect several architectures, total recompile time is reduced greatly because only the changed file need to be recompiled and linked. Also there is no need to use rules.xml and config.xml links in the top level directory.
I've only tested the following targets: amd64 cross-ppc cross-sparc32 cross-sparc64 cross-x86.
Maybe with small further changes it would also be possible to put the object directories completely outside of the source tree.
Comments?