1# OpenLibm 2 3[](https://travis-ci.org/JuliaLang/openlibm) 4 5[OpenLibm](http://www.openlibm.org) is an effort to have a high quality, portable, standalone 6C mathematical library ([`libm`](http://en.wikipedia.org/wiki/libm)). 7It can be used standalone in applications and programming language 8implementations. 9 10The project was born out of a need to have a good `libm` for the 11[Julia programming langage](http://www.julialang.org) that worked 12consistently across compilers and operating systems, and in 32-bit and 1364-bit environments. 14 15## Platform support 16 17OpenLibm builds on Linux, Mac OS X, Windows, FreeBSD, and OpenBSD. It 18builds with both GCC and clang. Although largely tested and widely 19used on x86 architectures, openlibm also supports ARM and 20powerPC. 21 22## Build instructions 23 241. Use `make` to build OpenLibm. 252. Use `make USEGCC=1` to build with GCC. This is the default on 26 Linux and Windows. 273. Use `make USECLANG=1` to build with clang. This is the default on OS X 28 and FreeBSD. 294. Architectures are auto-detected. Use `make ARCH=i386` to force a 30 build for i386. Other supported architectures are i486, i586, and 31 i686. GCC 4.8 is the minimum requirement for correct codegen on 32 older 32-bit architectures. 335. On OpenBSD, you need to install GNU Make (port name: `gmake`) and a recent 34 version of `gcc` (tested: 4.9.2), as the default version provided by OpenBSD 35 is too old (4.2.1). If you use OpenBSD's port system for this (port name: 36 `gcc`), run `make CC=egcc` to force Make to use the newer `gcc`. 37 38## Acknowledgements 39 40PowerPC support for openlibm was graciously sponsored by IBM. 41
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