linux-kernel - Re: [PATCH] kbuild: Fix running modpost with musl libc

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Message-ID: <b56a03b8-2a2a-f833-a5d2-cdc50a7ca2bb@cschramm.eu>
Date:   Wed, 4 Jan 2023 09:12:35 +0100
From:   Christopher Schramm <debian@...hramm.eu>
To:     masahiroy@...nel.org, samuel@...lland.org, nathan@...nel.org
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        ndesaulniers@...gle.com, nicolas@...sle.eu
Subject: Re: [PATCH] kbuild: Fix running modpost with musl libc

This change seems to break expected symbol warnings when building an 
external module against a kernel prepared with modules_prepare.

The build used to show

     WARNING: Module.symvers is missing.
              Modules may not have dependencies or modversions.
              You may get many unresolved symbol warnings.

followed by those many unresolved symbol warnings.

6.2-rc2 still shows that warning but the unresolved symbol messages are 
now errors and the build fails (at scripts/Makefile.modpost:137). This 
seems to happen due to -T getting added.