| # fabsf.m4 | |
| # serial 3 | |
| 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_FABSF], | |
| [ | |
| AC_REQUIRE([gl_MATH_H_DEFAULTS]) | |
| AC_REQUIRE([gl_FUNC_FABS]) | |
| dnl Persuade glibc <math.h> to declare fabsf(). | |
| AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) | |
| dnl Test whether fabsf() exists. We cannot assume that fabsf(), if it | |
| dnl exists, is defined in the same library as fabs(). This is not the case | |
| dnl on FreeBSD, NetBSD, OpenBSD. | |
| gl_MATHFUNC([fabsf], [float], [(float)]) | |
| if test $gl_cv_func_fabsf_no_libm = no \ | |
| && test $gl_cv_func_fabsf_in_libm = no; then | |
| HAVE_FABSF=0 | |
| FABSF_LIBM="$FABS_LIBM" | |
| fi | |
| AC_SUBST([FABSF_LIBM]) | |
| ]) |