| # rintf.m4 serial 4 |
| dnl Copyright (C) 2011-2020 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]) |
| ]) |
