2 dnl Copyright (C) 2007-2011 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.
9 AC_REQUIRE([gl_MATH_H_DEFAULTS])
10 gl_CHECK_NEXT_HEADERS([math.h])
11 AC_REQUIRE([AC_C_INLINE])
13 AC_CACHE_CHECK([whether NAN macro works], [gl_cv_header_math_nan_works],
14 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <math.h>]],
15 [[/* Solaris 10 has a broken definition of NAN. Other platforms
16 fail to provide NAN, or provide it only in C99 mode; this
17 test only needs to fail when NAN is provided but wrong. */
23 [gl_cv_header_math_nan_works=yes],
24 [gl_cv_header_math_nan_works=no])])
25 if test $gl_cv_header_math_nan_works = no; then
28 AC_CACHE_CHECK([whether HUGE_VAL works], [gl_cv_header_math_huge_val_works],
29 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <math.h>]],
30 [[/* Solaris 10 has a broken definition of HUGE_VAL. */
33 [gl_cv_header_math_huge_val_works=yes],
34 [gl_cv_header_math_huge_val_works=no])])
35 if test $gl_cv_header_math_huge_val_works = no; then
39 dnl Check for declarations of anything we want to poison if the
40 dnl corresponding gnulib module is not in use.
41 gl_WARN_ON_USE_PREPARE([[#include <math.h>]],
42 [acosf acosl asinf asinl atanf atanl
43 ceilf ceill copysign copysignf copysignl cosf cosl coshf
44 expf expl fabsf floorf floorl fmodf frexpf frexpl
45 ldexpf ldexpl logb logf logl log10f modff powf
46 round roundf roundl sinf sinl sinhf sqrtf sqrtl
47 tanf tanl tanhf trunc truncf truncl])
50 AC_DEFUN([gl_MATH_MODULE_INDICATOR],
52 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
53 AC_REQUIRE([gl_MATH_H_DEFAULTS])
54 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
55 dnl Define it also as a C macro, for the benefit of the unit tests.
56 gl_MODULE_INDICATOR_FOR_TESTS([$1])
59 AC_DEFUN([gl_MATH_H_DEFAULTS],
61 GNULIB_ACOSF=0; AC_SUBST([GNULIB_ACOSF])
62 GNULIB_ACOSL=0; AC_SUBST([GNULIB_ACOSL])
63 GNULIB_ASINF=0; AC_SUBST([GNULIB_ASINF])
64 GNULIB_ASINL=0; AC_SUBST([GNULIB_ASINL])
65 GNULIB_ATANF=0; AC_SUBST([GNULIB_ATANF])
66 GNULIB_ATANL=0; AC_SUBST([GNULIB_ATANL])
67 GNULIB_ATAN2F=0; AC_SUBST([GNULIB_ATAN2F])
68 GNULIB_CEIL=0; AC_SUBST([GNULIB_CEIL])
69 GNULIB_CEILF=0; AC_SUBST([GNULIB_CEILF])
70 GNULIB_CEILL=0; AC_SUBST([GNULIB_CEILL])
71 GNULIB_COPYSIGN=0; AC_SUBST([GNULIB_COPYSIGN])
72 GNULIB_COPYSIGNF=0; AC_SUBST([GNULIB_COPYSIGNF])
73 GNULIB_COPYSIGNL=0; AC_SUBST([GNULIB_COPYSIGNL])
74 GNULIB_COSF=0; AC_SUBST([GNULIB_COSF])
75 GNULIB_COSL=0; AC_SUBST([GNULIB_COSL])
76 GNULIB_COSHF=0; AC_SUBST([GNULIB_COSHF])
77 GNULIB_EXPF=0; AC_SUBST([GNULIB_EXPF])
78 GNULIB_EXPL=0; AC_SUBST([GNULIB_EXPL])
79 GNULIB_FABSF=0; AC_SUBST([GNULIB_FABSF])
80 GNULIB_FLOOR=0; AC_SUBST([GNULIB_FLOOR])
81 GNULIB_FLOORF=0; AC_SUBST([GNULIB_FLOORF])
82 GNULIB_FLOORL=0; AC_SUBST([GNULIB_FLOORL])
83 GNULIB_FMODF=0; AC_SUBST([GNULIB_FMODF])
84 GNULIB_FREXPF=0; AC_SUBST([GNULIB_FREXPF])
85 GNULIB_FREXP=0; AC_SUBST([GNULIB_FREXP])
86 GNULIB_FREXPL=0; AC_SUBST([GNULIB_FREXPL])
87 GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
88 GNULIB_ISINF=0; AC_SUBST([GNULIB_ISINF])
89 GNULIB_ISNAN=0; AC_SUBST([GNULIB_ISNAN])
90 GNULIB_ISNANF=0; AC_SUBST([GNULIB_ISNANF])
91 GNULIB_ISNAND=0; AC_SUBST([GNULIB_ISNAND])
92 GNULIB_ISNANL=0; AC_SUBST([GNULIB_ISNANL])
93 GNULIB_LDEXPF=0; AC_SUBST([GNULIB_LDEXPF])
94 GNULIB_LDEXPL=0; AC_SUBST([GNULIB_LDEXPL])
95 GNULIB_LOGB=0; AC_SUBST([GNULIB_LOGB])
96 GNULIB_LOGF=0; AC_SUBST([GNULIB_LOGF])
97 GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL])
98 GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F])
99 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
100 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
101 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
102 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
103 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
104 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
105 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
106 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
107 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
108 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
109 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
110 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
111 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
112 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
113 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
114 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
115 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
116 dnl Assume proper GNU behavior unless another module says otherwise.
117 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
118 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
119 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
120 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
121 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
122 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
123 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
124 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
125 HAVE_COPYSIGNF=1; AC_SUBST([HAVE_COPYSIGNF])
126 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
127 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
128 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
129 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
130 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
131 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
132 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
133 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
134 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
135 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
136 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
137 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
138 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
139 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
140 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
141 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
142 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
143 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
144 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
145 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
146 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
147 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
148 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
149 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
150 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
151 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
152 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
153 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
154 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
155 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
156 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
157 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
158 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
159 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
160 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
161 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
162 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
163 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
164 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
165 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
166 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
167 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
168 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
169 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
170 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
171 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
172 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
173 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
174 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
175 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
176 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
177 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
178 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
179 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
180 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
181 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
182 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
183 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
184 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
185 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
186 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
187 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
188 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
189 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
190 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
191 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
192 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
193 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
194 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
195 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
196 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
199 # gl_LONG_DOUBLE_VS_DOUBLE
200 # determines whether 'long double' and 'double' have the same representation.
201 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
202 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
203 # The currently known platforms where this is the case are:
204 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
205 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
207 AC_CACHE_CHECK([whether long double and double are the same],
208 [gl_cv_long_double_equals_double],
210 [AC_LANG_PROGRAM([[#include <float.h>]],
211 [[typedef int check[sizeof (long double) == sizeof (double)
212 && LDBL_MANT_DIG == DBL_MANT_DIG
213 && LDBL_MAX_EXP == DBL_MAX_EXP
214 && LDBL_MIN_EXP == DBL_MIN_EXP
217 [gl_cv_long_double_equals_double=yes],
218 [gl_cv_long_double_equals_double=no])
220 if test $gl_cv_long_double_equals_double = yes; then
221 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
222 [Define to 1 if 'long double' and 'double' have the same representation.])
223 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
225 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
227 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])