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# rintf.m4 serial 4
dnl Copyright (C) 2011-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_RINTF],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
dnl Persuade glibc <math.h> to declare rintf().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
dnl Determine RINTF_LIBM.
gl_MATHFUNC([rintf], [float], [(float)],
[extern
#ifdef __cplusplus
"C"
#endif
float rintf (float);
])
if test $gl_cv_func_rintf_no_libm = yes \
|| test $gl_cv_func_rintf_in_libm = yes; then
HAVE_RINTF=1
dnl Also check whether it's declared.
dnl IRIX 6.5 has rintf() in libm but doesn't declare it in <math.h>.
AC_CHECK_DECLS([rintf], , [HAVE_DECL_RINTF=0], [[#include <math.h>]])
else
HAVE_RINTF=0
HAVE_DECL_RINTF=0
RINTF_LIBM=
fi
AC_SUBST([RINTF_LIBM])
])
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