At Mon, 30 Mar 2015 08:41:52 +0200, Richard Weinberger wrote: > > one more concern on the out-of-arch-tree design is that how > > to handle our asm-generic-based header files > > (arch/lib/include/asm). we have been heavily used > > 'generic-y' in the Kbuild file to reuse header files. > > As noted before, libos is something in between. Maybe the asm-generic > stuff needs some modifications to make it work for libos. okay. > BTW: There is something really fishy wrt to your build process. > I did a ARCH=i386 build due to my regular kernel work and later a ARCH=lib build. > It seems to pickup old/unrelated object files. > After a make clean ARCH=i386 it build fine. > > ---cut--- > LIB liblinux-4.0.0-rc5.so > /usr/lib64/gcc/x86_64-suse-linux/4.8/../../../../x86_64-suse-linux/bin/ld: Warning: size of symbol `skb_copy_bits' changed from 10 in ./kernel/bpf/core.o to 441 in ./net/core/skbuff.o > ./net/ipv6/fib6_rules.o: In function `fib6_rule_lookup': > /home/rw/linux/net/ipv6/fib6_rules.c:34: multiple definition of `fib6_rule_lookup' (snip) right now arch/lib/Makefile isn't fully on the Kbuild system: build file dependency is not tracked at all. while I should learn more about Kbuild, I'd be happy if you would suggest how the Makefile should be. > ---cut--- > > While we're talking about the build process, how can I cross build libos? > Say a i386 libos on x86_64. For UML we have use SUBARCH. > i.e. make linux ARCH=um SUBARCH=i386 the cross build is not either implemented. if libos needs it, I'd start to think about the design: maybe SUBARCH-like mechanism is required. -- Hajime -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>