https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101473
--- Comment #21 from tonyb at cybernetics dot com --- I tried adding -f*-prefix-map to LDFLAGS in Yocto, and that makes everything I tested binary reproducible, except for some shared libraries in /lib and /usr/lib because libtool filters out the -f*-prefix-map flags when linking *.so libraries, but that is not a gcc issue. Since that seems like a viable solution, I will continue the discussion with the Yocto people. Thanks for your help!