[PATCH v2 01/14] arch: introduce symbol HAVE_INITJMP

[Heinrich Schuchardt]

On 25.02.25 17:34, Jerome Forissier wrote:
> HAVE_INIJMP will be set by architectures that support initjmp(), a
> non-standard extension to setjmp()/longjmp() allowing to initialize a
> jump buffer with a function pointer and a stack pointer. This will be
> useful to later introduce threads. With this new function it becomes
> possible to longjmp() to a particular function pointer (rather than
> to a point previously reached during program execution as is the case
> with setjmp()), and with a custom stack. Both things are needed to
> spin off a new thread. Then the usual setjmp()/ longjmp() pair is
> enough to save and restore a context, i.e., switch thread.
>
> Signed-off-by: Jerome Forissier <jerome.forissier at linaro.org>
> ---
>   arch/Kconfig | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 35b19f9bfdc..8d5b54031b3 100644
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -13,6 +13,12 @@ config HAVE_SETJMP
>   	help
>   	 The architecture supports setjmp() and longjmp().
>
> +config HAVE_INITJMP
> +	bool

HAVE_SETJMP controls if /arch/<arch>/lib/setjmp.S is compiled.

Please, add the missing dependency.

	depends HAVE_SETJMP

Best regards

Heinrich

> +	help
> +	 The architecture supports initjmp(), a non-standard companion to
> +	 setjmp() and longjmp().
> +
>   config SUPPORT_BIG_ENDIAN
>   	bool
>