Appendix A The C Math Library

Table of Contents

C Math Library Tables

The HP-UX C math library, libm, supports all mathematical functions specified by the ANSI C standard, ANS X3.159-1989, as well as functions specified by the XPG4.2, SVID, and COSE Common API (Spec 1170) specifications.

In addition, the library supports the following value-added functions specific to HP-UX:

float versions of many mathematical functions
Degree-valued trigonometric functions
A group of functions and macros recommended by the IEEE standard (see Table 2-12 “HP-UX Support for IEEE Recommended Functions”), including fpclassify, copysign, and isfinite
An additional group of floating-point functions and macros that the ISO/ANSI C committee has included in the C9X draft standard
The fenv(5) suite, a collection of functions (included in the C9X draft standard) that allow an application to manipulate the floating-point status register (see Chapter 5 “Manipulating the Floating-Point Status Register” for more information)

If your program calls libm math functions, you must link in the appropriate library explicitly. See “Locations of the Math Libraries at Release 11.0” for a list of the different versions of libm and their directory locations.

For more information about math libraries, including C math library error handling, see Chapter 4 “HP-UX Math Libraries on HP 9000 Systems”. For details about these functions, see the online man pages.

Appendix A The C Math Library

Technical documentation

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