Godot-devkit

Godot-devkit is a project to build LLVM sharpened for speed building Godot. Main aim is to make a drop-in clang distribution for building Godot. Which means if devkit distribution fails compiling godot with certain configuration, system distribution should fail with the same configuration too, otherwise it should be considered a bug.

Status

Builds with (Full LTO + PGO) currently it gives 30% speed boost. "production ready" but in "testing phase"

Building

Run build.sh. The produced devkit will be named godot-devkit.tar.xz

Usage

1. Install all dependencies necessary for building godot

2. Unpack devkit to any place

3. Export path to devkit

export PATH=/path/to/devkit/bin:$PATH
scons -j16 use_llvm="yes" lld="yes" use_static_cpp="no"

Some systems doens't provide static versions of libc, libstdc++ and libatomic so use_static_cpp should be used on those systems. It should also make linkage a bit faster

4. For other build-time options please see Compiling for Linux

TODO:

• Add BOLT
• Try to do CSIR instrumentation instead of usual IR
• Check if CSIR instrumentation was used correctly (IR+CSIR)
• Change string printed by clang --version to godot-devkit or something similar
  • CLANG_VENDOR, CLANG_REPOSITORY_STRING allow to change string only partially :/
• Add clean target which preserves stage1 or something which allows to do quick developing without lots of rebuilds