[Buildroot] [PATCH] linux: add an option to install kernel headers into staging

[Yann E. MORIN <yann.morin.1998@free.fr>]

Nicolas, All,

On 2015-03-24 11:00 +0100, Nicolas Serafini spake thusly:
> The kernel headers are installed into /usr/src/linux-headers-version
> of the staging folder.
> 
> These headers can be used, for example, by a post build script to
> install or update some new headers from the kernel in /usr/include of
> the staging.

No, no. The kernel headers in staging are those that come from the
toolchain.

When the toolchain has been compiled, parts of it (notably the C
library) have been configured according to whatever API/ABI the kernel
headers where exporting to userland. Those headers can *not* be changed
after the fact.

So, this is a big NAK from me, sorry.

Regards,
Yann E. MORIN.

> Signed-off-by: Nicolas Serafini <nicolas.serafini@sensefly.com>
> ---
>  linux/Config.in | 6 ++++++
>  linux/linux.mk  | 9 +++++++++
>  2 files changed, 15 insertions(+)
> 
> diff --git a/linux/Config.in b/linux/Config.in
> index fa3232f..dd97211 100644
> --- a/linux/Config.in
> +++ b/linux/Config.in
> @@ -354,6 +354,12 @@ config BR2_LINUX_KERNEL_INSTALL_TARGET
>  	  /boot if DTBs have been generated by the kernel build
>  	  process.
>  
> +config BR2_LINUX_KERNEL_INSTALL_HEADERS
> +	bool "Install kernel headers to staging"
> +	help
> +	  Select this option to have the kernel headers installed to
> +	  staging in /usr/src/linux-headers-version folder.
> +
>  # Linux extensions
>  source "linux/Config.ext.in"
>  
> diff --git a/linux/linux.mk b/linux/linux.mk
> index 5a0ba01..c7792d4 100644
> --- a/linux/linux.mk
> +++ b/linux/linux.mk
> @@ -7,6 +7,9 @@
>  LINUX_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
>  LINUX_LICENSE = GPLv2
>  LINUX_LICENSE_FILES = COPYING
> +ifeq ($(BR2_LINUX_KERNEL_INSTALL_HEADERS),y)
> +LINUX_INSTALL_STAGING=YES
> +endif
>  
>  # Compute LINUX_SOURCE and LINUX_SITE from the configuration
>  ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)
> @@ -54,6 +57,7 @@ LINUX_MAKE_FLAGS = \
>  	HOSTCFLAGS="$(HOSTCFLAGS)" \
>  	ARCH=$(KERNEL_ARCH) \
>  	INSTALL_MOD_PATH=$(TARGET_DIR) \
> +	INSTALL_HDR_PATH="$(STAGING_DIR)/usr/src/linux-headers-$(LINUX_VERSION)" \
>  	CROSS_COMPILE="$(CCACHE) $(TARGET_CROSS)" \
>  	DEPMOD=$(HOST_DIR)/sbin/depmod
>  
> @@ -297,6 +301,11 @@ define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
>  endef
>  endif
>  
> +ifeq ($(BR2_LINUX_KERNEL_INSTALL_HEADERS),y)
> +define LINUX_INSTALL_STAGING_CMDS
> +	$(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME) headers_install
> +endef
> +endif
>  
>  define LINUX_INSTALL_HOST_TOOLS
>  	# Installing dtc (device tree compiler) as host tool, if selected
> -- 
> 2.3.4
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'