The project was born out of a need to have a good
libm for the
Julia programming language that worked
consistently across compilers and operating systems, and in 32-bit and
OpenLibm builds on Linux, macOS, Windows, FreeBSD, OpenBSD, NetBSD, and DragonFly BSD. It builds with both GCC and clang. Although largely tested and widely used on the x86 and x86-64 architectures, OpenLibm also supports arm, aarch64, ppc64le, mips, wasm32, riscv, and s390(x).
- Use GNU Make to build OpenLibm. This is
makeon most systems, but
make USEGCC=1to build with GCC. This is the default on Linux and Windows.
make USECLANG=1to build with clang. This is the default on OS X, FreeBSD, and OpenBSD.
make ARCH=wasm32to build the wasm32 library with clang. Requires clang-8.
- Architectures are auto-detected. Use
make ARCH=i386to force a build for i386. Other supported architectures are i486, i586, and i686. GCC 4.8 is the minimum requirement for correct codegen on older 32-bit architectures.
PowerPC support for openlibm was graciously sponsored by IBM.