Ed Schouten
d07820351b
I guess the idea would be to eventually also install all of the openlibm*.h headers, instead of just openlibm.h. Make openlibm_fenv.h suitable for this purpose by moving all of the $ARCH/fenv.h headers next to it. We actually need this change to make OPENLIBM_USE_HOST_FENV_H work. Right now it's still broken, because the "#include <fenv.h>" performed by openlibm_fenv.h still pulls in $ARCH/fenv.h as $ARCH/ is added to the compiler include path.
OpenLibm
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.
History
The OpenLibm code derives from the FreeBSD
msun and OpenBSD
libm
implementations, which in turn derives from FDLIBM
5.3. As a result, it includes a number
of fixes and updates to FDLIBM that have accumulated over the years in
msun, and optimized versions of many functions.
Platform support
OpenLibm builds on Linux, Mac OS X, and Windows, and with little
effort, should build on FreeBSD as well. It builds with both GCC and
clang. Although largely tested on x86, it also includes experimental
support for ARM. The original msun also includes support for mips,
sparc64, powerpc, ia64, and alpha. These are present in the OpenLibm
source tree, but no attempt has been made to build any of these.
Build instructions
makeormake 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.