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Date:   Fri, 10 Nov 2023 18:57:48 +0100 (CET)
From:   Jan Engelhardt <jengelh@inai.de>
To:     =?UTF-8?Q?Michal_Such=C3=A1nek?= <msuchanek@suse.de>
cc:     Masahiro Yamada <masahiroy@kernel.org>,
        linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
        Nicolas Schier <nicolas@fjasle.eu>,
        linux-modules@vger.kernel.org, Takashi Iwai <tiwai@suse.com>,
        Lucas De Marchi <lucas.de.marchi@gmail.com>,
        =?UTF-8?Q?Michal_Koutn=C3=BD?= <mkoutny@suse.com>,
        Jiri Slaby <jslaby@suse.com>,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>
Subject: Re: [PATCH rebased] kbuild: rpm-pkg: Fix build with non-default
 MODLIB
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On Friday 2023-11-10 18:44, Michal Suchánek wrote:
>> It's a complicated mumble-jumble. Prior art exists as in:
>> 
>>  /opt/vendorThing/bin/...
>>  /usr/X11R6/lib/libXi.so.6 [host binary]
>>  /usr/x86_64-w64-mingw32/bin/as [host binary]
>>  /usr/x86_64-w64-mingw32/sys-root/mingw/bin/as.exe [foreign binary]
>>  /usr/platform/SUNW,Ultra-2/lib/libprtdiag_psr.so.1 [looks foreign]
>> 
>> The use of suffix-based naming must have been established sometime
>> near the end of the 90s or the start of 2000s as the first biarch
>> Linux distros emerged. Probably in gcc or glibc sources one will find
>> the root of where the use of suffix identifiers like /usr/lib64
>> started. Leaves the question open "why".
>
>That's pretty clear: to be able to install libraries for multiple
>architectures at the same time.

Well, what I tried to express or imply was something like:

“ we could (should?) have used /usr/<triplet>/lib rather than
  /usr/lib<suffixortriplet> all along, because at some point, there *will* be
  someone who wants to provide not only arch-different libraries, but *also*
  arch-different binaries (for whatever reason).