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List:       user-mode-linux-devel
Subject:    Re: [uml-devel] [PATCH 1/3] um: Run host archheaders,
From:       richard -rw- weinberger <richard.weinberger () gmail ! com>
Date:       2011-12-08 22:06:22
Message-ID: CAFLxGvxuP64FzhKcL5bL2vv=sfQ0ZB2U_xXd4MkAF006RJfZrA () mail ! gmail ! com
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On Tue, Dec 6, 2011 at 2:05 AM, H. Peter Anvin <hpa@linux.intel.com> wrote:
> From: "H. Peter Anvin" <hpa@linux.intel.com>
>
> Run the "archheaders" target for the host architecture, for
> architectures (like x86, now) that want to generate some of the
> necessary header files.
>
> Add $(HOST_DIR)/include/generated to the include path so we then pick
> them up.
>
> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
> ---
>  arch/um/Makefile |    7 ++++++-
>  1 files changed, 6 insertions(+), 1 deletions(-)
>
> diff --git a/arch/um/Makefile b/arch/um/Makefile
> index 7730af6..00210e9 100644
> --- a/arch/um/Makefile
> +++ b/arch/um/Makefile
> @@ -64,7 +64,8 @@ USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
>  #This will adjust *FLAGS accordingly to the platform.
>  include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
>
> -KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include
> +KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
> +                  -I$(HOST_DIR)/include/generated
>
>  # -Derrno=kernel_errno - This turns all kernel references to errno into
>  # kernel_errno to separate them from the libc errno.  This allows -fno-common
> @@ -96,6 +97,10 @@ endef
>
>  KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig
>
> +archheaders:
> +       $(Q)$(MAKE) -C '$(KBUILD_SRC)' KBUILD_SRC= \
> +               ARCH=$(SUBARCH) O='$(objtree)' archheaders
> +

This does not work, KBUILD_SRC is empty.
I'm not a kbuild expert, but I think the usage of KBUILD_SRC is in general
not allowed.

-- 
Thanks,
//richard

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