2 dnl Copyright (C) 2010 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 # gl_MATHFUNC(FUNC, RETTYPE, PARAMTYPES)
8 # --------------------------------------------------
9 # tests whether the function FUNC is available in libc or libm.
10 # RETTYPE is the return type. PARAMTYPES is a parameter list, with parentheses.
11 # It sets FUNC_LIBM to empty or "-lm" accordingly.
13 AC_DEFUN([gl_MATHFUNC],
15 dnl We need the RETTYPE and PARAMTYPES in order to force linking with the
16 dnl function. With gcc >= 4.3 on glibc/x86_64, calls to the 'fabs' function
17 dnl are inlined by the compiler, therefore linking of these calls does not
18 dnl require -lm, but taking the function pointer of 'fabs' does.
19 m4_pushdef([func], [$1])
20 m4_pushdef([FUNC], [m4_translit([$1],[abcdefghijklmnopqrstuvwxyz],
21 [ABCDEFGHIJKLMNOPQRSTUVWXYZ])])
23 AC_CACHE_CHECK([whether func() can be used without linking with libm],
24 [gl_cv_func_]func[_no_libm],
28 [[#ifndef __NO_MATH_INLINES
29 # define __NO_MATH_INLINES 1 /* for glibc */
32 $2 (*funcptr) $3 = ]func[;]],
33 [[$2 y = funcptr ]m4_bpatsubst([m4_bpatsubst([$3], [int], [2])], [double], [1.6180339887])[;
34 return y < 0.3 || y > 1.7;
36 [gl_cv_func_]func[_no_libm=yes],
37 [gl_cv_func_]func[_no_libm=no])
39 if test $gl_cv_func_[]func[]_no_libm = no; then
40 AC_CACHE_CHECK([whether func() can be used with libm],
41 [gl_cv_func_]func[_in_libm],
47 [[#ifndef __NO_MATH_INLINES
48 # define __NO_MATH_INLINES 1 /* for glibc */
51 $2 (*funcptr) $3 = ]func[;]],
52 [[$2 y = funcptr ]m4_bpatsubst([m4_bpatsubst([$3], [int], [2])], [double], [1.6180339887])[;
53 return y < 0.3 || y > 1.7;
55 [gl_cv_func_]func[_in_libm=yes],
56 [gl_cv_func_]func[_in_libm=no])
59 if test $gl_cv_func_[]func[]_in_libm = yes; then
68 # gl_COMMON_DOUBLE_MATHFUNC(FUNC)
69 # -------------------------------
70 # tests whether the function FUNC is available in libc or libm.
71 # It sets FUNC_LIBM to empty or "-lm" accordingly.
72 # FUNC must be one of the following functions, that are present on all systems
73 # and provided by libm on all systems except MacOS X, BeOS, Haiku:
74 # acos asin atan atan2 cbrt cos cosh erf erfc exp fmod hypot j0 j1 jn lgamma
75 # log log10 log1p pow remainder sin sinh sqrt tan tanh y0 y1 yn
77 AC_DEFUN([gl_COMMON_DOUBLE_MATHFUNC],
79 AC_REQUIRE([gl_COMMON_DOUBLE_MATHFUNC_TEST])
80 m4_pushdef([FUNC], [m4_translit([$1],[abcdefghijklmnopqrstuvwxyz],
81 [ABCDEFGHIJKLMNOPQRSTUVWXYZ])])
82 FUNC[]_LIBM="$POW_LIBM"
87 AC_DEFUN([gl_COMMON_DOUBLE_MATHFUNC_TEST],
89 dnl We could use any of the following:
90 dnl gl_MATHFUNC([acos], [double], [(double)])
91 dnl gl_MATHFUNC([asin], [double], [(double)])
92 dnl gl_MATHFUNC([atan], [double], [(double)])
93 dnl gl_MATHFUNC([atan2], [double], [(double, double)])
94 dnl gl_MATHFUNC([cbrt], [double], [(double)])
95 dnl gl_MATHFUNC([cos], [double], [(double)])
96 dnl gl_MATHFUNC([cosh], [double], [(double)])
97 dnl gl_MATHFUNC([erf], [double], [(double)])
98 dnl gl_MATHFUNC([erfc], [double], [(double)])
99 dnl gl_MATHFUNC([exp], [double], [(double)])
100 dnl gl_MATHFUNC([fmod], [double], [(double, double)])
101 dnl gl_MATHFUNC([hypot], [double], [(double, double)])
102 dnl gl_MATHFUNC([j0], [double], [(double)])
103 dnl gl_MATHFUNC([j1], [double], [(double)])
104 dnl gl_MATHFUNC([jn], [double], [(int, double)])
105 dnl gl_MATHFUNC([lgamma], [double], [(double)])
106 dnl gl_MATHFUNC([log], [double], [(double)])
107 dnl gl_MATHFUNC([log10], [double], [(double)])
108 dnl gl_MATHFUNC([log1p], [double], [(double)])
109 dnl gl_MATHFUNC([pow], [double], [(double, double)])
110 dnl gl_MATHFUNC([remainder], [double], [(double, double)])
111 dnl gl_MATHFUNC([sin], [double], [(double)])
112 dnl gl_MATHFUNC([sinh], [double], [(double)])
113 dnl gl_MATHFUNC([sqrt], [double], [(double)])
114 dnl gl_MATHFUNC([tan], [double], [(double)])
115 dnl gl_MATHFUNC([tanh], [double], [(double)])
116 dnl gl_MATHFUNC([y0], [double], [(double)])
117 dnl gl_MATHFUNC([y1], [double], [(double)])
118 dnl gl_MATHFUNC([yn], [double], [(int, double)])
119 gl_MATHFUNC([pow], [double], [(double, double)])