linux-kernel - Re: [PATCH 1/2] net: Remove net/ipx.h and uapi/linux/ipx.h header files

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Message-Id: <AZHUZQ.4E5G2GAEGJ0U@crapouillou.net>
Date:   Wed, 22 Sep 2021 18:01:58 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Eugene Syromiatnikov <esyr@...hat.com>
Cc:     Cai Huoqing <caihuoqing@...du.com>,
        Steve Grubb <sgrubb@...hat.com>, linux-audit@...hat.com,
        strace development discussions <strace-devel@...ts.strace.io>,
        linux-api@...r.kernel.org, davem@...emloft.net,
        yoshfuji@...ux-ipv6.org, dsahern@...nel.org, kuba@...nel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org, ldv@...ace.io
Subject: Re: [PATCH 1/2] net: Remove net/ipx.h and uapi/linux/ipx.h header
 files

Hi,

>>  IPX is marked obsolete for serveral years. so remove it and the
>>  dependency in linux tree.
>>  I'm sorry to not thinking about linux-audit and strace.
>>  Might you remove the dependency or make the part of the code.
>>  Many thanks.
> 
> Unfortunately, that is not how UAPI works.  That change breaks 
> building
> of the existing code;  one cannot change already released versions
> of either audit, strace, or any other userspace program that happens
> to unconditionally include <linux/ipx.h> without any fallback (like
> <netipx/ipx.h> provided by glibc).

Also, the <netipx/ipx.h> fallback is only provided by glibc (and maybe 
uclibc?). With this patch, it is now impossible to compile even the 
very latest version of "strace" with a musl toolchain.

Cheers,
-Paul