OpenLibm is an effort to have a high quality, portable, standalone C mathematical library (libm). It can be used standalone in applications and programming language implementations.

The project was born out of a need to have a good libm for the Julia programming langage that worked consistently across compilers and operating systems, and in 32-bit and 64-bit environments.

This fork of OpenLibm is designed to be a drop-in replacement for libsystem_m.dylib for PureDarwin. The main difference between this version and the original is that the fenv_t structure and accompanying functions have been replaced with those from the most recent Apple Libm (v2026). This allows binary compatibility with existing code.

For the original repo, see here.

• Replace the #if 1s with a proper PUREDARWIN macro
• Check ARM support works