2 dnl Copyright (C) 2011-2018 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_RINT],
9 AC_REQUIRE([gl_MATH_H_DEFAULTS])
11 dnl Determine RINT_LIBM.
12 dnl The reason for the extra code is:
13 dnl In AIX 7.1 with gcc 4.2, when optimization is turned on, calls to
14 dnl rint() with simple arguments are turned into rintf() calls by the
15 dnl compiler. But while rint() is resides in libc, rintf() is in libm.
16 gl_MATHFUNC([rint], [double], [(double)], [], [y += rint (2.0);])
17 if test $gl_cv_func_rint_no_libm = no \
18 && test $gl_cv_func_rint_in_libm = no; then