https://lists.ibiblio.org/sympa/arc/sm-grimoire-bugs/2010-02/msg00088.html
sm-grimoire-bugs - [SM-Grimoire-Bugs] [Bug 15565] glibc UP_TRIGGERS fails to trigger libdrm - arc
grimoirebugsglibctriggersfails
https://dawn.googlesource.com/dawn/+/refs/heads/chromium/6930/third_party/libdrm/README.chromium
third_party/libdrm/README.chromium - dawn - Git at Google
third partylibdrmreadmechromiumdawn
https://cos.googlesource.com/third_party/overlays/chromiumos-overlay/+/74a4484ad95a2e8bf208432605ac659b212f3e65/x11-libs/arc-libdrm?autodive=0%2F%2F%2F%2F
x11-libs/arc-libdrm - third_party/overlays/chromiumos-overlay - Git at Google
third partylibsarclibdrmoverlays