[techmememe]

Might be possible to slap these patches on top UXP and get it building. http://thereisonlyxul.org

[classichasclass]

Author here. Sadly, not without a current toolchain, plus all the custom changes for Mac OS 9 on top of NSPR and other pieces. CodeWarrior is a solid compiler but the classic Mac OS versions definitely show their age compared to modern gcc and clang.

[duskwuff]

I wonder how much work would be needed to generate PEF from a modern PowerPC toolchain...