![](http://www.gnu-darwin.org/hexley-gd-sm.png)
|
- Synopsis
AC_CXX_HAVE_IEEE_MATH
- Version
1.1.1.1 (2001/07/26) C++_Support @ ac-archive-0.5.39
- Author
Luc Maisonobe
- Description
If the compiler has the double math functions acosh,
asinh, atanh, expm1, erf, erfc, isnan, j0, j1, lgamma, logb,
log1p, rint, y0 and y1, define HAVE_IEEE_MATH.
- M4 Source Code
AC_DEFUN([AC_CXX_HAVE_IEEE_MATH],
[AC_CACHE_CHECK(whether the compiler supports IEEE math library,
ac_cv_cxx_have_ieee_math,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
ac_save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
#ifndef _ALL_SOURCE
#define _ALL_SOURCE
#endif
#ifndef _XOPEN_SOURCE
#define _XOPEN_SOURCE
#endif
#ifndef _XOPEN_SOURCE_EXTENDED
#define _XOPEN_SOURCE_EXTENDED 1
#endif
#include <math.h>],[double x = 1.0; double y = 1.0;
acosh(x); asinh(x); atanh(x); expm1(x); erf(x); erfc(x); isnan(x);
j0(x); j1(x); lgamma(x); logb(x); log1p(x); rint(x); y0(x); y1(x);
return 0;],
ac_cv_cxx_have_ieee_math=yes, ac_cv_cxx_have_ieee_math=no)
LIBS="$ac_save_LIBS"
AC_LANG_RESTORE
])
if test "$ac_cv_cxx_have_ieee_math" = yes; then
AC_DEFINE(HAVE_IEEE_MATH,,[define if the compiler supports IEEE math library])
fi
])
|