Add link time optimization

devkitPro / wut

Let's try to make a Wii U Toolchain / SDK for creating rpx/rpl.

zlib License

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Closed V10lator closed 2 years ago

V10lator commented 4 years ago

As WUT is a library we build as fat-lto-objects. That way both, non-LTO and LTO homebrew are able to link with ease.

fincs commented 4 years ago

A few things:

Our toolchains support LTO natively and are able to link LTO and non-LTO objects together. It is not necessary to build fat binaries; specifying just -flto is enough.
wut, much like the other system libraries we provide, extensively use weak functions/override mechanisms as well as function aliasing. LTO is known to be problematic when these features are used.