Hi everyone, we updated https://github.com/ilbers/isar in our setup from From 0.9 213b8f62fa74e87321f927fb6b4ed9db93e5cb37 to 0.10 dev 51f5b0dbecb4a7271540793e13c54fac69b42da0 With this update edk2 standalonemm rpmb build started to faile because of /usr/lib/gcc-cross/aarch64-linux-gnu/10/../../../../aarch64-linux- gnu/bin/ld: cannot find -llto-aarch64 the same error, if we deactivate cross build if we go back to 0.9 the error does not apear It doesn't matter if we are using edk2 202302 oder 202311 version of edk2. we normaly build with GCC5 toolchain flag (GCC for 202311 an newer) If we switch to edk2 toolchain GCC49 (GCCNOLTO for 202311 and newer) it compiles without any further errors. So something in that update to 0.10 seems to prevent LTO to be not available anymore. Did someone see similar already, or already knows the reason? br Sven