2 dnl Copyright (C) 2010-2011 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_COSL],
9 AC_REQUIRE([gl_MATH_H_DEFAULTS])
10 dnl Persuade glibc <math.h> to declare cosl().
11 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
14 AC_CACHE_CHECK([whether cosl() can be used without linking with libm],
15 [gl_cv_func_cosl_no_libm],
19 [[#ifndef __NO_MATH_INLINES
20 # define __NO_MATH_INLINES 1 /* for glibc */
24 [[return cosl (x) > 0.4;]])],
25 [gl_cv_func_cosl_no_libm=yes],
26 [gl_cv_func_cosl_no_libm=no])
28 if test $gl_cv_func_cosl_no_libm = no; then
29 AC_CACHE_CHECK([whether cosl() can be used with libm],
30 [gl_cv_func_cosl_in_libm],
36 [[#ifndef __NO_MATH_INLINES
37 # define __NO_MATH_INLINES 1 /* for glibc */
41 [[return cosl (x) > 0.4;]])],
42 [gl_cv_func_cosl_in_libm=yes],
43 [gl_cv_func_cosl_in_libm=no])
46 if test $gl_cv_func_cosl_in_libm = yes; then
50 if test $gl_cv_func_cosl_no_libm = yes \
51 || test $gl_cv_func_cosl_in_libm = yes; then
52 dnl Also check whether it's declared.
53 dnl MacOS X 10.3 has cosl() in libc but doesn't declare it in <math.h>.
54 AC_CHECK_DECL([cosl], , [HAVE_DECL_COSL=0], [#include <math.h>])
58 dnl Find libraries needed to link lib/cosl.c, lib/sincosl.c, lib/trigl.c.
59 AC_REQUIRE([gl_FUNC_ISNANL])
60 AC_REQUIRE([gl_FUNC_FLOOR])
61 AC_REQUIRE([gl_FUNC_FLOORL])
62 dnl Append $ISNANL_LIBM to COSL_LIBM, avoiding gratuitous duplicates.
63 case " $COSL_LIBM " in
64 *" $ISNANL_LIBM "*) ;;
65 *) COSL_LIBM="$COSL_LIBM $ISNANL_LIBM" ;;
67 dnl Append $FLOOR_LIBM to COSL_LIBM, avoiding gratuitous duplicates.
68 case " $COSL_LIBM " in
70 *) COSL_LIBM="$COSL_LIBM $FLOOR_LIBM" ;;
72 dnl Append $FLOORL_LIBM to COSL_LIBM, avoiding gratuitous duplicates.
73 case " $COSL_LIBM " in
74 *" $FLOORL_LIBM "*) ;;
75 *) COSL_LIBM="$COSL_LIBM $FLOORL_LIBM" ;;