The LLVM compiler runtime (compiler-rt) is essential in clang-based builds. However, it should be noted that the compiler-rt is exclusively accessible in the form of source code for RISC-V targets. Consequently, within this project, we possess the capability to construct it entirely from scratch.
To build it, run make, the static library will be generated at build/libcompiler-rt.a.
Then use following Makefile configuration:
LDFLAGS += -L./build -lcompiler-rt
This project is completely from the llvm project:
- Repo:
https://github.com/llvm/llvm-project - Branch:
release/18.x - Commit:
3b5b5c1
See more: https://github.com/llvm/llvm-project/blob/release/18.x/compiler-rt/lib/builtins/README.txt