Re: [PATCH] Makefile: Fix config-devices.mak not regenerated when Kconfig updated

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On Mon, Nov 4, 2019 at 10:55 AM Philippe Mathieu-Daudé
<philmd@redhat.com> wrote:
>
> When hw/$DIR/Kconfig is changed, the corresponding generated
> hw/$DIR/config-devices.mak is not being updated.
> Fix this by including all the hw/*/Kconfig files to the prerequisite
> names of the rule generating the config-devices.mak files.

You can see this tread where Peter reported the failure:
https://lists.gnu.org/archive/html/qemu-devel/2019-11/msg00125.html

How to reproduce:

  $  git checkout next_branch
  $  make i386-softmmu/all
  $  git checkout prev_branch
  $ make clean
  $ make i386-softmmu/all
    # error
  $  make print-MINIKCONF_INPUTS

> Fixes: e0e312f3525a (build: switch to Kconfig)
> Reported-by: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
> If OK, I plan to include this fix in the "hw/i386/pc: Split PIIX3
> southbridge from i440FX northbridge" pull request.
> ---
>  Makefile | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/Makefile b/Makefile
> index 0e994a275d..c1461b21e8 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -384,7 +384,10 @@ MINIKCONF_ARGS = \
>      CONFIG_LINUX=$(CONFIG_LINUX) \
>      CONFIG_PVRDMA=$(CONFIG_PVRDMA)
>
> -MINIKCONF_INPUTS = $(SRC_PATH)/Kconfig.host $(SRC_PATH)/hw/Kconfig
> +MINIKCONF_INPUTS = $(SRC_PATH)/Kconfig.host $(SRC_PATH)/hw/Kconfig \
> +                   $(patsubst %,$(SRC_PATH)/hw/%,$(shell sed -ne \
> +                                                    's/source \(.*\)/\1/p' \
> +                                                    < $(SRC_PATH)/hw/Kconfig))
>  MINIKCONF = $(PYTHON) $(SRC_PATH)/scripts/minikconf.py \
>
>  $(SUBDIR_DEVICES_MAK): %/config-devices.mak: default-configs/%.mak $(MINIKCONF_INPUTS) $(BUILD_DIR)/config-host.mak
> --
> 2.21.0
>