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AC_CXX_HAVE_SYSTEM_V_MATH
If the compiler has the double math functions _class, trunc, itrunc, nearest, rsqrt, uitrunc, copysign, drem, finite, and unordered, define HAVE_SYSTEM_V_MATH.
http://autoconf-archive.cryp.to/ac_cxx_have_system_v_math.m4
Copyright © 2008 Todd Veldhuizen
Copyright © 2008 Luc Maisonobe <luc@spaceroots.org>
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