| # rint.m4 | |
| # serial 4 | |
| dnl Copyright (C) 2011-2026 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. | |
| dnl This file is offered as-is, without any warranty. | |
| AC_DEFUN([gl_FUNC_RINT], | |
| [ | |
| AC_REQUIRE([gl_MATH_H_DEFAULTS]) | |
| dnl Determine RINT_LIBM. | |
| dnl The reason for the extra code is: | |
| dnl In AIX 7.1 with gcc 4.2, when optimization is turned on, calls to | |
| dnl rint() with simple arguments are turned into rintf() calls by the | |
| dnl compiler. But while rint() is resides in libc, rintf() is in libm. | |
| gl_MATHFUNC([rint], [double], [(double)], [], [y += rint (2.0);]) | |
| if test $gl_cv_func_rint_no_libm = no \ | |
| && test $gl_cv_func_rint_in_libm = no; then | |
| HAVE_RINT=0 | |
| RINT_LIBM= | |
| fi | |
| AC_SUBST([RINT_LIBM]) | |
| ]) |