linux-kernel - Re: [Patch] UML build: fix missing posix

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Message-ID: <20080731201602.GC25158@uranus.ravnborg.org>
Date:	Thu, 31 Jul 2008 22:16:02 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	WANG Cong <xiyou.wangcong@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, jdike@...toit.com,
	linux-kbuild@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net,
	Andrew Morton <akpm@...l.org>
Subject: Re: [Patch] UML build: fix missing posix_types.h

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 <wangcong@...ux.org>
> Cc: sam@...nborg.org
> Cc: jdike@...toit.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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