2 dnl Copyright (C) 2007-2012 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 cbrt cbrtf cbrtl ceilf ceill copysign copysignf copysignl cosf cosl coshf
44 expf expl exp2 expm1 expm1f expm1l fabsf fabsl floorf floorl fma fmaf fmal
45 fmod fmodf fmodl frexpf frexpl hypotf hypotl
46 ldexpf ldexpl logb logf logl log10f log10l modf modff modfl powf
47 remainder remainderf remainderl
48 rint rintf rintl round roundf roundl sinf sinl sinhf sqrtf sqrtl
49 tanf tanl tanhf trunc truncf truncl])
52 AC_DEFUN([gl_MATH_MODULE_INDICATOR],
54 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
55 AC_REQUIRE([gl_MATH_H_DEFAULTS])
56 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
57 dnl Define it also as a C macro, for the benefit of the unit tests.
58 gl_MODULE_INDICATOR_FOR_TESTS([$1])
61 AC_DEFUN([gl_MATH_H_DEFAULTS],
63 GNULIB_ACOSF=0; AC_SUBST([GNULIB_ACOSF])
64 GNULIB_ACOSL=0; AC_SUBST([GNULIB_ACOSL])
65 GNULIB_ASINF=0; AC_SUBST([GNULIB_ASINF])
66 GNULIB_ASINL=0; AC_SUBST([GNULIB_ASINL])
67 GNULIB_ATANF=0; AC_SUBST([GNULIB_ATANF])
68 GNULIB_ATANL=0; AC_SUBST([GNULIB_ATANL])
69 GNULIB_ATAN2F=0; AC_SUBST([GNULIB_ATAN2F])
70 GNULIB_CBRT=0; AC_SUBST([GNULIB_CBRT])
71 GNULIB_CBRTF=0; AC_SUBST([GNULIB_CBRTF])
72 GNULIB_CBRTL=0; AC_SUBST([GNULIB_CBRTL])
73 GNULIB_CEIL=0; AC_SUBST([GNULIB_CEIL])
74 GNULIB_CEILF=0; AC_SUBST([GNULIB_CEILF])
75 GNULIB_CEILL=0; AC_SUBST([GNULIB_CEILL])
76 GNULIB_COPYSIGN=0; AC_SUBST([GNULIB_COPYSIGN])
77 GNULIB_COPYSIGNF=0; AC_SUBST([GNULIB_COPYSIGNF])
78 GNULIB_COPYSIGNL=0; AC_SUBST([GNULIB_COPYSIGNL])
79 GNULIB_COSF=0; AC_SUBST([GNULIB_COSF])
80 GNULIB_COSL=0; AC_SUBST([GNULIB_COSL])
81 GNULIB_COSHF=0; AC_SUBST([GNULIB_COSHF])
82 GNULIB_EXPF=0; AC_SUBST([GNULIB_EXPF])
83 GNULIB_EXPL=0; AC_SUBST([GNULIB_EXPL])
84 GNULIB_EXP2=0; AC_SUBST([GNULIB_EXP2])
85 GNULIB_EXPM1=0; AC_SUBST([GNULIB_EXPM1])
86 GNULIB_EXPM1F=0; AC_SUBST([GNULIB_EXPM1F])
87 GNULIB_EXPM1L=0; AC_SUBST([GNULIB_EXPM1L])
88 GNULIB_FABSF=0; AC_SUBST([GNULIB_FABSF])
89 GNULIB_FABSL=0; AC_SUBST([GNULIB_FABSL])
90 GNULIB_FLOOR=0; AC_SUBST([GNULIB_FLOOR])
91 GNULIB_FLOORF=0; AC_SUBST([GNULIB_FLOORF])
92 GNULIB_FLOORL=0; AC_SUBST([GNULIB_FLOORL])
93 GNULIB_FMA=0; AC_SUBST([GNULIB_FMA])
94 GNULIB_FMAF=0; AC_SUBST([GNULIB_FMAF])
95 GNULIB_FMAL=0; AC_SUBST([GNULIB_FMAL])
96 GNULIB_FMOD=0; AC_SUBST([GNULIB_FMOD])
97 GNULIB_FMODF=0; AC_SUBST([GNULIB_FMODF])
98 GNULIB_FMODL=0; AC_SUBST([GNULIB_FMODL])
99 GNULIB_FREXPF=0; AC_SUBST([GNULIB_FREXPF])
100 GNULIB_FREXP=0; AC_SUBST([GNULIB_FREXP])
101 GNULIB_FREXPL=0; AC_SUBST([GNULIB_FREXPL])
102 GNULIB_HYPOT=0; AC_SUBST([GNULIB_HYPOT])
103 GNULIB_HYPOTF=0; AC_SUBST([GNULIB_HYPOTF])
104 GNULIB_HYPOTL=0; AC_SUBST([GNULIB_HYPOTL])
105 GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
106 GNULIB_ISINF=0; AC_SUBST([GNULIB_ISINF])
107 GNULIB_ISNAN=0; AC_SUBST([GNULIB_ISNAN])
108 GNULIB_ISNANF=0; AC_SUBST([GNULIB_ISNANF])
109 GNULIB_ISNAND=0; AC_SUBST([GNULIB_ISNAND])
110 GNULIB_ISNANL=0; AC_SUBST([GNULIB_ISNANL])
111 GNULIB_LDEXPF=0; AC_SUBST([GNULIB_LDEXPF])
112 GNULIB_LDEXPL=0; AC_SUBST([GNULIB_LDEXPL])
113 GNULIB_LOGB=0; AC_SUBST([GNULIB_LOGB])
114 GNULIB_LOGF=0; AC_SUBST([GNULIB_LOGF])
115 GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL])
116 GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F])
117 GNULIB_LOG10L=0; AC_SUBST([GNULIB_LOG10L])
118 GNULIB_MODF=0; AC_SUBST([GNULIB_MODF])
119 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
120 GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL])
121 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
122 GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER])
123 GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF])
124 GNULIB_REMAINDERL=0; AC_SUBST([GNULIB_REMAINDERL])
125 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
126 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
127 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
128 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
129 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
130 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
131 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
132 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
133 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
134 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
135 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
136 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
137 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
138 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
139 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
140 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
141 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
142 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
143 dnl Assume proper GNU behavior unless another module says otherwise.
144 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
145 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
146 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
147 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
148 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
149 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
150 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
151 HAVE_CBRT=1; AC_SUBST([HAVE_CBRT])
152 HAVE_CBRTF=1; AC_SUBST([HAVE_CBRTF])
153 HAVE_CBRTL=1; AC_SUBST([HAVE_CBRTL])
154 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
155 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
156 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
157 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
158 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
159 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
160 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
161 HAVE_EXPM1=1; AC_SUBST([HAVE_EXPM1])
162 HAVE_EXPM1F=1; AC_SUBST([HAVE_EXPM1F])
163 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
164 HAVE_FABSL=1; AC_SUBST([HAVE_FABSL])
165 HAVE_FMA=1; AC_SUBST([HAVE_FMA])
166 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF])
167 HAVE_FMAL=1; AC_SUBST([HAVE_FMAL])
168 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
169 HAVE_FMODL=1; AC_SUBST([HAVE_FMODL])
170 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
171 HAVE_HYPOTF=1; AC_SUBST([HAVE_HYPOTF])
172 HAVE_HYPOTL=1; AC_SUBST([HAVE_HYPOTL])
173 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
174 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
175 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
176 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
177 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
178 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
179 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
180 HAVE_LOG10L=1; AC_SUBST([HAVE_LOG10L])
181 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
182 HAVE_MODFL=1; AC_SUBST([HAVE_MODFL])
183 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
184 HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER])
185 HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF])
186 HAVE_RINT=1; AC_SUBST([HAVE_RINT])
187 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
188 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
189 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
190 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
191 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
192 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
193 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
194 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
195 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
196 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
197 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
198 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
199 HAVE_DECL_CBRTF=1; AC_SUBST([HAVE_DECL_CBRTF])
200 HAVE_DECL_CBRTL=1; AC_SUBST([HAVE_DECL_CBRTL])
201 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
202 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
203 HAVE_DECL_COPYSIGNF=1; AC_SUBST([HAVE_DECL_COPYSIGNF])
204 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
205 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
206 HAVE_DECL_EXP2=1; AC_SUBST([HAVE_DECL_EXP2])
207 HAVE_DECL_EXPM1L=1; AC_SUBST([HAVE_DECL_EXPM1L])
208 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
209 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
210 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
211 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
212 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
213 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
214 HAVE_DECL_LOG10L=1; AC_SUBST([HAVE_DECL_LOG10L])
215 HAVE_DECL_REMAINDER=1; AC_SUBST([HAVE_DECL_REMAINDER])
216 HAVE_DECL_REMAINDERL=1; AC_SUBST([HAVE_DECL_REMAINDERL])
217 HAVE_DECL_RINTF=1; AC_SUBST([HAVE_DECL_RINTF])
218 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
219 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
220 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
221 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
222 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
223 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
224 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
225 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
226 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
227 REPLACE_CBRTF=0; AC_SUBST([REPLACE_CBRTF])
228 REPLACE_CBRTL=0; AC_SUBST([REPLACE_CBRTL])
229 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
230 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
231 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
232 REPLACE_EXPM1=0; AC_SUBST([REPLACE_EXPM1])
233 REPLACE_EXPM1F=0; AC_SUBST([REPLACE_EXPM1F])
234 REPLACE_EXP2=0; AC_SUBST([REPLACE_EXP2])
235 REPLACE_FABSL=0; AC_SUBST([REPLACE_FABSL])
236 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
237 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
238 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
239 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA])
240 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF])
241 REPLACE_FMAL=0; AC_SUBST([REPLACE_FMAL])
242 REPLACE_FMOD=0; AC_SUBST([REPLACE_FMOD])
243 REPLACE_FMODF=0; AC_SUBST([REPLACE_FMODF])
244 REPLACE_FMODL=0; AC_SUBST([REPLACE_FMODL])
245 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
246 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
247 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
248 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
249 REPLACE_HYPOT=0; AC_SUBST([REPLACE_HYPOT])
250 REPLACE_HYPOTF=0; AC_SUBST([REPLACE_HYPOTF])
251 REPLACE_HYPOTL=0; AC_SUBST([REPLACE_HYPOTL])
252 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
253 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
254 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
255 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
256 REPLACE_MODF=0; AC_SUBST([REPLACE_MODF])
257 REPLACE_MODFF=0; AC_SUBST([REPLACE_MODFF])
258 REPLACE_MODFL=0; AC_SUBST([REPLACE_MODFL])
259 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
260 REPLACE_REMAINDER=0; AC_SUBST([REPLACE_REMAINDER])
261 REPLACE_REMAINDERF=0; AC_SUBST([REPLACE_REMAINDERF])
262 REPLACE_REMAINDERL=0; AC_SUBST([REPLACE_REMAINDERL])
263 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
264 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
265 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
266 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
267 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
268 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
269 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
270 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
273 # gl_LONG_DOUBLE_VS_DOUBLE
274 # determines whether 'long double' and 'double' have the same representation.
275 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
276 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
277 # The currently known platforms where this is the case are:
278 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
279 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
281 AC_CACHE_CHECK([whether long double and double are the same],
282 [gl_cv_long_double_equals_double],
284 [AC_LANG_PROGRAM([[#include <float.h>]],
285 [[typedef int check[sizeof (long double) == sizeof (double)
286 && LDBL_MANT_DIG == DBL_MANT_DIG
287 && LDBL_MAX_EXP == DBL_MAX_EXP
288 && LDBL_MIN_EXP == DBL_MIN_EXP
291 [gl_cv_long_double_equals_double=yes],
292 [gl_cv_long_double_equals_double=no])
294 if test $gl_cv_long_double_equals_double = yes; then
295 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
296 [Define to 1 if 'long double' and 'double' have the same representation.])
297 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
299 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
301 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])