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The PGO (Profile-guided Optimization) collect data about the typical execution of a program and then use this data to inform optimizations such as inlining, machine-code layout, register allocation, etc. This optimization is by default disabled in rust sources but enabled in Yocto and causing the reproducibility issue in rustdoc binary. To fix the issue this optimization is set to it's default 'false'. More about the optimization: https://doc.rust-lang.org/rustc/profile-guided-optimization.html With the reproducibility issue fixed, we can enable the reproducibility tests again. (From OE-Core rev: 189c266378c8c4a918cb205b3888577c7ce76856) Signed-off-by: Sundeep KOKKONDA <sundeep.kokkonda@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>