If the compiler has the double math functions _class, trunc, itrunc, nearest, rsqrt, uitrunc, copysign, drem, finite, and unordered, define HAVE_SYSTEM_V_MATH.
Download the latest version of ax_cxx_have_system_v_math.m4 or browse the macro’s revision history.
Copyright © 2008 Todd Veldhuizen
Copyright © 2008 Luc Maisonobe firstname.lastname@example.org
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. This file is offered as-is, without any warranty.