Commit a0db7281373 for nodejs

commit a0db72813730ee1235067d094d588481476cb179
Author: Issac <163278029+theSnackOverflow@users.noreply.github.com>
Date:   Wed Oct 7 15:41:15 2026 +0900

    doc: document linux-x64-musl build toolchain

    Add the build platform and compiler for official musl binaries.

    Signed-off-by: Ji Hoon Kang <ivory.ma9ic@gmail.com>
    Assisted-by: Codex
    PR-URL: https://github.com/nodejs/node/pull/66523
    Fixes: https://github.com/nodejs/node/issues/66506
    Reviewed-By: Richard Lau <richard.lau@ibm.com>
    Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
    Reviewed-By: James M Snell <jasnell@gmail.com>

diff --git a/BUILDING.md b/BUILDING.md
index 6fc93ca2ad0..e3786552887 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -179,6 +179,7 @@ Binaries at <https://nodejs.org/download/release/> are produced on:
 | linux-ppc64le           | RHEL 9 with Clang 20.1 and gcc-toolset-14-libatomic-devel[^6] |
 | linux-s390x             | RHEL 9 with Clang 20.1 and gcc-toolset-14-libatomic-devel[^6] |
 | linux-x64               | RHEL 9 with Clang 20.1 and gcc-toolset-14-libatomic-devel[^6] |
+| linux-x64-musl          | Alpine 3.23 with Clang 21                                     |
 | win-arm64               | Windows Server 2022 (x64) with Visual Studio 2022             |
 | win-x64                 | Windows Server 2022 (x64) with Visual Studio 2022             |