What does HackerNews think of cyclone?
:cyclone: A brand-new compiler that allows practical application development using R7RS Scheme. We provide modern features and a stable system capable of generating fast native binaries.
Language:
Scheme
If you aren't nailed down on lisp but scheme would be an option for you, there's cyclone [1] which also has FFI and C ABI support iirc.
Same here, one of my long ongoing projects is a scheme compiler following the same ideas as chicken (https://www.call-cc.org/) and cyclone (https://github.com/justinethier/cyclone).
The compiler is written in rust which generates C (that's currently dependent on being compiled by GCC or Clang). https://github.com/nitros12/some-scheme-compiler
Many Lisp and Scheme compilers have C output.
Embeddable Common Lisp https://common-lisp.net/project/ecl/
GNU Common Lisp http://www.gnu.org/software/gcl/
ManKai Common Lisp https://common-lisp.net/project/mkcl/
Clasp (C++ interop )https://github.com/drmeister/clasp
ThinLisp https://sourceforge.net/projects/thinlisp/
https://github.com/aoh/owl-lisp
Bigloo Scheme CHICKEN Scheme Gambit Scheme https://github.com/justinethier/cyclone RScheme SCM Stalin
Not necessarily, it can be extended to support multithreading: