On Thu, Jul 31, 2008 at 01:10:28PM +0100, WANG Cong wrote:
>
> When building UML with 'O=foo' specified, I got:
>
> CC kernel/bounds.s
> In file included from
> /home/wangcong/Projects/linux-2.6/include/linux/types.h:11,
> from
> /home/wangcong/Projects/linux-2.6/include/linux/page-flags.h:8,
> from
> /home/wangcong/Projects/linux-2.6/kernel/bounds.c:9:
> /home/wangcong/Projects/linux-2.6/include/linux/posix_types.h:47:29:
> error: asm/posix_types.h: No such file or directory
> In file included from
> /home/wangcong/Projects/linux-2.6/include/linux/page-flags.h:8,
> from
> /home/wangcong/Projects/linux-2.6/kernel/bounds.c:9:
> /home/wangcong/Projects/linux-2.6/include/linux/types.h:12:23: error:
> asm/types.h: No such file or directory
> In file included from
> /home/wangcong/Projects/linux-2.6/include/linux/page-flags.h:8,
>
> Below patch fixed it, note, it is only tested for x86 and um.
>
> Signed-off-by: WANG Cong
> Cc: sam@ravnborg.org
> Cc: jdike@addtoit.com
>
> ---
> diff --git a/Makefile b/Makefile
> index aa527a4..39130d1 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -930,7 +930,8 @@ ifneq ($(KBUILD_SRC),)
> /bin/false; \
> fi;
> $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
> - $(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/system.h ]; then \
> + $(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/system.h -o \
> + -e $(objtree)/include/asm-$(SRCARCH)/system.h ] ; then \
> ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
> fi
> endif

I have a similar patch locally. I just check for errno.h so I
do not have to do the extra check in objtree.
Will push tonight.

Sam
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