Re: [Buildroot] [PATCH/next v2 02/16] package/python3: berkeleydb support needs the dbm interface

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

Hello Bernd,

On Wed,  9 Aug 2023 19:33:20 +0200
Bernd Kuhls <bernd@kuhls.net> wrote:

> Berkeley DB support in python depends on dbm, when missing python fails
> to detect libdb:
> https://github.com/python/cpython/blob/d2340ef25721b6a72d45d4508c672c4be38c67d3/configure.ac#L4002
> 
> quoting configure log:
> checking for libdb... no
> 
> quoting python config.log:
> conftest.c:(.text.startup+0x8): undefined reference to `__db_ndbm_open'
> 
> With this patch berkeleydb produces a working module:
> 
> output/build/python3-3.11.4$ find -iname *dbm*.so
> ./build/lib.linux-x86_64-3.11/_dbm.cpython-311-x86_64-linux-gnu.so
> 
> Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
> ---
>  package/python3/Config.in | 1 +
>  1 file changed, 1 insertion(+)

So I have finally looked into, and it is not a Python 3.11 issue. The
issue already exists in Python 3.10, we just didn't realize. See my
commit log at
https://gitlab.com/buildroot.org/buildroot/-/commit/b84ffd85e2900741bb97325b53d09e170e941e6c.

So, as can be seen, this investigation is important: it shows that it's
not a problem introduced since the bump of Python 3.11, but it's a
problem that existed before, and therefore those fixes need to be
backported to our stable branches that have Python < 3.11.

So I've applied the patch to the master branch.

Thanks a lot!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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