On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said: > > Can someone tell me if the i386 one is to be used when we want to build for > > a 32bit machine and the x86_64 is to be used for 64 bit machine? > > You can build the kernel with any architecture for any architecture. > This is called cross-compiling. The homepage [0] should explain you how > to do that.
Right, but you still need to use a .config appropriate for the target machine, which is what I think Rajat was asking about. A defconfig is usually only known verified to boot on a few (possibly one) examples of that architecture hardware. For embedded ARM, it may be one specific development board or hardware device. For x86, I think they try to keep it "will probably kind of sort of boot on generic PC hardware with a common distro, but anything fancylike a webcam or better graphics than "vga tty emulation" may not work". A defconfig is pretty much just a proof of concept starting point for an actual working config for a given hardware system.
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