[Bug 2109333] Re: glibc package metadata in all binaries

[Benjamin Drung]

The environment variable ELF_PACKAGE_METADATA needs to be unset for
that. We should probably do that for all startup object files (crt0.o,
crt1.o, crti.o, crtn.o, Scrt1.o, gcrt1.o, Mcrt1.o).

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https://bugs.launchpad.net/bugs/2109333

Title:
  glibc package metadata in all binaries

Status in glibc package in Ubuntu:
  New

Bug description:
  glibc appears in the ELF package metadata of (all?) binary packages.
  Examples:

  ```
  $ readelf --notes /usr/bin/hd | tail -n6
  Displaying notes found in: .note.package
    Besitzer             Datengröße	Description
    FDO                  0x00000060	FDO_PACKAGING_METADATA
      Packaging Metadata: {"type":"deb","os":"ubuntu","name":"glibc","version":"2.40-4ubuntu1","architecture":"amd64"}
    FDO                  0x00000068	FDO_PACKAGING_METADATA
      Packaging Metadata: {"type":"deb","os":"ubuntu","name":"util-linux","version":"2.40.2-14ubuntu1","architecture":"amd64"}
  ```

  or

  ```
  $ readelf --notes /usr/bin/sleep | tail -n6
  Displaying notes found in: .note.package
    Besitzer             Datengröße	Description
    FDO                  0x00000060	FDO_PACKAGING_METADATA
      Packaging Metadata: {"type":"deb","os":"ubuntu","name":"glibc","version":"2.40-4ubuntu1","architecture":"amd64"}
    FDO                  0x00000060	FDO_PACKAGING_METADATA
      Packaging Metadata: {"type":"deb","os":"ubuntu","name":"coreutils","version":"9.5-1ubuntu1","architecture":"amd64"}
  ```

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