Change Details

Redo our build flags, specifically: - Only set `-fdata-sections` and `-ffunction-sections` in relation to LTO setting (and size/speed optimisation) - Drop `-fexceptions` (code bloat) - Drop `-fno-omit-frame-pointer` (code bloat, performance, lost a register) - Swap `-fstack-protector --param ssp-buffer-size=32` for `-fstack-protector-strong` (covers the usual cases and isn't too aggressive) - Fix ypkg to support optional LTO on clang builds - Consider dropping `-copy-dt-needed-entries` due to gold borkage - Consider defaulting to ld.gold when using `lto` optimisation - Consider `-Wl,-Bsymbolic-functions` (`-Bsymbolic` by itself seems to have the potential for function pointer issues) to improve .so performance **Kernel:** - Backport libata power management fix ([patch](https://patchwork.kernel.org/patch/9952739/)) - Update kernels - drag in some new turbo (3.0) patches **Misc:** - Convert mesa to ypkg (pull from `runtime-snaps`) - for now move the LDM trigger into `kernel-glue` (absorb later into `usysconf`) (LTO, speed optimisations) - Add more items after next sleep.

~~Redo our build flags, specifically:~~ **DONE** - Only set `-fdata-sections` and `-ffunction-sections` in relation to LTO setting (and size/speed optimisation) - Drop `-fexceptions` (code bloat) - Drop `-fno-omit-frame-pointer` (code bloat, performance, lost a register) - Swap `-fstack-protector --param ssp-buffer-size=32` for `-fstack-protector-strong` (covers the usual cases and isn't too aggressive) - Fix ypkg to support optional LTO on clang builds - Consider dropping `-copy-dt-needed-entries` due to gold borkage - Consider defaulting to ld.gold when using `lto` optimisation - Consider `-Wl,-Bsymbolic-functions` (`-Bsymbolic` by itself seems to have the potential for function pointer issues) to improve .so performance **Kernel:** - Backport libata power management fix ([patch](https://patchwork.kernel.org/patch/9952739/)) - Update kernels - drag in some new turbo (3.0) patches **Misc:** - Convert mesa to ypkg (pull from `runtime-snaps`) - for now move the LDM trigger into `kernel-glue` (absorb later into `usysconf`) (LTO, speed optimisations) - Add more items after next sleep.

~~Redo our build flags, specifically:~~ **DONE** - Only set `-fdata-sections` and `-ffunction-sections` in relation to LTO setting (and size/speed optimisation) - Drop `-fexceptions` (code bloat) - Drop `-fno-omit-frame-pointer` (code bloat, performance, lost a register) - Swap `-fstack-protector --param ssp-buffer-size=32` for `-fstack-protector-strong` (covers the usual cases and isn't too aggressive) - Fix ypkg to support optional LTO on clang builds - Consider dropping `-copy-dt-needed-entries` due to gold borkage - Consider defaulting to ld.gold when using `lto` optimisation - Consider `-Wl,-Bsymbolic-functions` (`-Bsymbolic` by itself seems to have the potential for function pointer issues) to improve .so performance **Kernel:** - Backport libata power management fix ([patch](https://patchwork.kernel.org/patch/9952739/)) - Update kernels - drag in some new turbo (3.0) patches **Misc:** - Convert mesa to ypkg (pull from `runtime-snaps`) - for now move the LDM trigger into `kernel-glue` (absorb later into `usysconf`) (LTO, speed optimisations) - Add more items after next sleep.