[PATCH 1/1] kconfig: add CPU endian selection beconfig and leconfig
Florian Fainelli
f.fainelli at gmail.com
Fri Nov 27 10:39:36 PST 2015
Le 26/11/2015 11:59, Scott Branden a écrit :
> Add support for switching defconfig between big and little endian CPU.
> Various CPU types have ability to select big and little endian
> CPU in the kernel configuration.
>
> "make beconfig" will set CONFIG_CPU_BIG_ENDIAN
> "make leconfig" will unset CONFIG_CPU_BIG_ENDIAN
I believe I understand what you are trying to achieve here, which is to
have an identical defconfig file that you can share between a big-endian
and little-endian kernel?
Is not this something better left to a build system which understands
what config fragments are in general?
Since we seem to have support for fragments now with kvm and friends,
having this does not seem to be a big stretch though.
>
> Signed-off-by: Scott Branden <sbranden at broadcom.com>
> ---
> kernel/configs/be.config | 1 +
> kernel/configs/le.config | 1 +
> scripts/kconfig/Makefile | 10 ++++++++++
> 3 files changed, 12 insertions(+)
> create mode 100644 kernel/configs/be.config
> create mode 100644 kernel/configs/le.config
>
> diff --git a/kernel/configs/be.config b/kernel/configs/be.config
> new file mode 100644
> index 0000000..c5cdc99
> --- /dev/null
> +++ b/kernel/configs/be.config
> @@ -0,0 +1 @@
> +CONFIG_CPU_BIG_ENDIAN=y
> diff --git a/kernel/configs/le.config b/kernel/configs/le.config
> new file mode 100644
> index 0000000..be479cf
> --- /dev/null
> +++ b/kernel/configs/le.config
> @@ -0,0 +1 @@
> +# CONFIG_CPU_BIG_ENDIAN is not set
> diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
> index d79cba4..2e8007e 100644
> --- a/scripts/kconfig/Makefile
> +++ b/scripts/kconfig/Makefile
> @@ -126,6 +126,14 @@ PHONY += tinyconfig
> tinyconfig:
> $(Q)$(MAKE) -f $(srctree)/Makefile allnoconfig tiny.config
>
> +PHONY += beconfig
> +beconfig: be.config
> + @:
> +
> +PHONY += leconfig
> +leconfig: le.config
> + @:
> +
> # Help text used by make help
> help:
> @echo ' config - Update current config utilising a line-oriented program'
> @@ -151,6 +159,8 @@ help:
> @echo ' kvmconfig - Enable additional options for kvm guest kernel support'
> @echo ' xenconfig - Enable additional options for xen dom0 and guest kernel support'
> @echo ' tinyconfig - Configure the tiniest possible kernel'
> + @echo ' beconfig - Update current config to use big endian CPU'
> + @echo ' leconfig - Update current config to use little endian CPU'
>
> # lxdialog stuff
> check-lxdialog := $(srctree)/$(src)/lxdialog/check-lxdialog.sh
>
--
Florian
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