[Buildroot] [PATCH 1/1] package/python3: add optional support for lib2to3

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

Bernd, All,

On 2021-01-03 16:03 +0100, Bernd Kuhls spake thusly:
> Kodi is in transition to support python3 instead of python2:
> https://kodi.wiki/view/General_information_about_migration_to_Python_3
> 
> "For Kodi 18 (Leia), only addons that are compatible with both Python 2
>  and 3 will be accepted to the official addon repository."
> 
> Some of these addons depend on the Kodi addon script.module.future to
> provide support for both python versions.
> 
> The script.module.future addon contains python-future:
> https://kodi.wiki/view/General_information_about_migration_to_Python_3#Future
> which in turn needs lib2to3 to be included in the target build of
> python3: http://python-future.org/automatic_conversion.html
> 
> Kodi addons depending on the script.module.future addon are crashing on
> buildroot due to lib2to3 missing in the build.
> 
> LibreELEC added lib2to3 to python3 to fix the problem:
> https://forum.libreelec.tv/thread/21239-lib2to3-pgen2-parse-missing/
> https://github.com/LibreELEC/LibreELEC.tv/pull/4146
> 
> This patch provides the Config.in option to be used by Kodi 19.
> 
> Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>

Applied to master, thanks.

However, I had to do a few fixes;

  - fix conflicts due to local changes in author's tree
  - fix typ in variabl name (PYTHON_CONF_OPTS -> PYTHON3_CONF_OPTS)

Please be carefull when you send patches: rebase them on master before
sending (see below).

Also, run: make check-package, that will hint at the variable typo I had
to fix too.

> ---
>  package/python3/Config.in  | 5 +++++
>  package/python3/python3.mk | 7 ++++++-
>  2 files changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/package/python3/Config.in b/package/python3/Config.in
> index 7e19f84843..efc4dbb3d4 100644
> --- a/package/python3/Config.in
> +++ b/package/python3/Config.in
> @@ -41,6 +41,11 @@ menu "core python3 modules"
>  
>  comment "The following modules are unusual or require extra libraries"
>  
> +config BR2_PACKAGE_PYTHON3_2TO3
> +	bool "2to3 module"
> +	help
> +	  code translation from python 2 to 3
> +
>  config BR2_PACKAGE_PYTHON3_BERKELEYDB

We do not have that in master, so the patch did not apply cleanly...

Will you send support for the bdb module?

Regards,
Yann E. MORIN.

>  	bool "berkeleydb"
>  	select BR2_PACKAGE_BERKELEYDB
> diff --git a/package/python3/python3.mk b/package/python3/python3.mk
> index d200eecf76..de90b4a267 100644
> --- a/package/python3/python3.mk
> +++ b/package/python3/python3.mk
> @@ -55,6 +55,12 @@ else
>  PYTHON3_CONF_OPTS += --disable-berkeleydb
>  endif
>  
> +ifeq ($(BR2_PACKAGE_PYTHON3_2TO3),y)
> +PYTHON_CONF_OPTS += --enable-lib2to3
> +else
> +PYTHON_CONF_OPTS += --disable-lib2to3
> +endif
> +
>  ifeq ($(BR2_PACKAGE_PYTHON3_READLINE),y)
>  PYTHON3_DEPENDENCIES += readline
>  else
> @@ -162,7 +168,6 @@ PYTHON3_CONF_OPTS += \
>  	--with-system-ffi \
>  	--disable-pydoc \
>  	--disable-test-modules \
> -	--disable-lib2to3 \
>  	--disable-tk \
>  	--disable-nis \
>  	--disable-idle3 \
> -- 
> 2.29.2
> 
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