linux-kernel - Re: [PATCH] get rid of the last symlink in uml build

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Message-ID: <20081217072620.GA3551@uranus.ravnborg.org>
Date:	Wed, 17 Dec 2008 08:26:20 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	jdike@...toit.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] get rid of the last symlink in uml build

On Wed, Dec 17, 2008 at 06:12:50AM +0000, Al Viro wrote:
> 	We need to make asm-offsets.h contents visible for objects built
> with userland headers.  Instead of creating a symlink, just have the
> file with equivalent include (relative to location of header) created
> once.
> 
> 	That kills the last symlink used in arch/um builds.  Have fun...

great!
Soon we have no more symlinks generated for a kernel build.
um used to be the worst of all but you have fixed it all up now.

Minor comment below.

Thanks,
	Sam
> 
> Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> ---
> diff --git a/arch/um/Makefile b/arch/um/Makefile
> index d944c34..3fd7e45 100644
> --- a/arch/um/Makefile
> +++ b/arch/um/Makefile
> @@ -22,10 +22,11 @@ MODE_INCLUDE	+= -I$(srctree)/$(ARCH_DIR)/include/shared/skas
>  
>  include $(srctree)/$(ARCH_DIR)/Makefile-skas
>  
> -ARCH_INCLUDE	:= -I$(srctree)/$(ARCH_DIR)/include/shared
> +SHARED_HEADERS	:= $(ARCH_DIR)/include/shared
> +ARCH_INCLUDE	:= -I$(srctree)/$(SHARED_HEADERS)
>  ARCH_INCLUDE	+= -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)/shared
>  ifneq ($(KBUILD_SRC),)
> -ARCH_INCLUDE	+= -I$(ARCH_DIR)/include/shared # for two generated files
> +ARCH_INCLUDE	+= -I$(SHARED_HEADERS)
>  endif
>  KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)
>  
> @@ -85,8 +86,8 @@ endef
>  
>  KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH)
>  
> -archprepare: $(ARCH_DIR)/include/shared/user_constants.h
> -prepare: $(ARCH_DIR)/include/shared/kern_constants.h
> +archprepare: $(SHARED_HEADERS)/user_constants.h
> +prepare: $(SHARED_HEADERS)/kern_constants.h

arch Makefiles should rely solely on the archprepare target.
That cleanup could come later as it is independent from
the purpose of this patch.

	Sam
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