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 exp2f exp2l expm1 expm1f expm1l
45 fabsf fabsl floorf floorl fma fmaf fmal
46 fmod fmodf fmodl frexpf frexpl hypotf hypotl
47 ldexpf ldexpl logb log logf logl log10f log10l modf modff modfl powf
48 remainder remainderf remainderl
49 rint rintf rintl round roundf roundl sinf sinl sinhf sqrtf sqrtl
50 tanf tanl tanhf trunc truncf truncl])
53 AC_DEFUN([gl_MATH_MODULE_INDICATOR],
55 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
56 AC_REQUIRE([gl_MATH_H_DEFAULTS])
57 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
58 dnl Define it also as a C macro, for the benefit of the unit tests.
59 gl_MODULE_INDICATOR_FOR_TESTS([$1])
62 AC_DEFUN([gl_MATH_H_DEFAULTS],
64 GNULIB_ACOSF=0; AC_SUBST([GNULIB_ACOSF])
65 GNULIB_ACOSL=0; AC_SUBST([GNULIB_ACOSL])
66 GNULIB_ASINF=0; AC_SUBST([GNULIB_ASINF])
67 GNULIB_ASINL=0; AC_SUBST([GNULIB_ASINL])
68 GNULIB_ATANF=0; AC_SUBST([GNULIB_ATANF])
69 GNULIB_ATANL=0; AC_SUBST([GNULIB_ATANL])
70 GNULIB_ATAN2F=0; AC_SUBST([GNULIB_ATAN2F])
71 GNULIB_CBRT=0; AC_SUBST([GNULIB_CBRT])
72 GNULIB_CBRTF=0; AC_SUBST([GNULIB_CBRTF])
73 GNULIB_CBRTL=0; AC_SUBST([GNULIB_CBRTL])
74 GNULIB_CEIL=0; AC_SUBST([GNULIB_CEIL])
75 GNULIB_CEILF=0; AC_SUBST([GNULIB_CEILF])
76 GNULIB_CEILL=0; AC_SUBST([GNULIB_CEILL])
77 GNULIB_COPYSIGN=0; AC_SUBST([GNULIB_COPYSIGN])
78 GNULIB_COPYSIGNF=0; AC_SUBST([GNULIB_COPYSIGNF])
79 GNULIB_COPYSIGNL=0; AC_SUBST([GNULIB_COPYSIGNL])
80 GNULIB_COSF=0; AC_SUBST([GNULIB_COSF])
81 GNULIB_COSL=0; AC_SUBST([GNULIB_COSL])
82 GNULIB_COSHF=0; AC_SUBST([GNULIB_COSHF])
83 GNULIB_EXPF=0; AC_SUBST([GNULIB_EXPF])
84 GNULIB_EXPL=0; AC_SUBST([GNULIB_EXPL])
85 GNULIB_EXP2=0; AC_SUBST([GNULIB_EXP2])
86 GNULIB_EXP2F=0; AC_SUBST([GNULIB_EXP2F])
87 GNULIB_EXP2L=0; AC_SUBST([GNULIB_EXP2L])
88 GNULIB_EXPM1=0; AC_SUBST([GNULIB_EXPM1])
89 GNULIB_EXPM1F=0; AC_SUBST([GNULIB_EXPM1F])
90 GNULIB_EXPM1L=0; AC_SUBST([GNULIB_EXPM1L])
91 GNULIB_FABSF=0; AC_SUBST([GNULIB_FABSF])
92 GNULIB_FABSL=0; AC_SUBST([GNULIB_FABSL])
93 GNULIB_FLOOR=0; AC_SUBST([GNULIB_FLOOR])
94 GNULIB_FLOORF=0; AC_SUBST([GNULIB_FLOORF])
95 GNULIB_FLOORL=0; AC_SUBST([GNULIB_FLOORL])
96 GNULIB_FMA=0; AC_SUBST([GNULIB_FMA])
97 GNULIB_FMAF=0; AC_SUBST([GNULIB_FMAF])
98 GNULIB_FMAL=0; AC_SUBST([GNULIB_FMAL])
99 GNULIB_FMOD=0; AC_SUBST([GNULIB_FMOD])
100 GNULIB_FMODF=0; AC_SUBST([GNULIB_FMODF])
101 GNULIB_FMODL=0; AC_SUBST([GNULIB_FMODL])
102 GNULIB_FREXPF=0; AC_SUBST([GNULIB_FREXPF])
103 GNULIB_FREXP=0; AC_SUBST([GNULIB_FREXP])
104 GNULIB_FREXPL=0; AC_SUBST([GNULIB_FREXPL])
105 GNULIB_HYPOT=0; AC_SUBST([GNULIB_HYPOT])
106 GNULIB_HYPOTF=0; AC_SUBST([GNULIB_HYPOTF])
107 GNULIB_HYPOTL=0; AC_SUBST([GNULIB_HYPOTL])
108 GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
109 GNULIB_ISINF=0; AC_SUBST([GNULIB_ISINF])
110 GNULIB_ISNAN=0; AC_SUBST([GNULIB_ISNAN])
111 GNULIB_ISNANF=0; AC_SUBST([GNULIB_ISNANF])
112 GNULIB_ISNAND=0; AC_SUBST([GNULIB_ISNAND])
113 GNULIB_ISNANL=0; AC_SUBST([GNULIB_ISNANL])
114 GNULIB_LDEXPF=0; AC_SUBST([GNULIB_LDEXPF])
115 GNULIB_LDEXPL=0; AC_SUBST([GNULIB_LDEXPL])
116 GNULIB_LOGB=0; AC_SUBST([GNULIB_LOGB])
117 GNULIB_LOG=0; AC_SUBST([GNULIB_LOG])
118 GNULIB_LOGF=0; AC_SUBST([GNULIB_LOGF])
119 GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL])
120 GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F])
121 GNULIB_LOG10L=0; AC_SUBST([GNULIB_LOG10L])
122 GNULIB_MODF=0; AC_SUBST([GNULIB_MODF])
123 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
124 GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL])
125 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
126 GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER])
127 GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF])
128 GNULIB_REMAINDERL=0; AC_SUBST([GNULIB_REMAINDERL])
129 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
130 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
131 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
132 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
133 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
134 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
135 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
136 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
137 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
138 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
139 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
140 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
141 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
142 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
143 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
144 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
145 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
146 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
147 dnl Assume proper GNU behavior unless another module says otherwise.
148 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
149 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
150 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
151 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
152 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
153 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
154 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
155 HAVE_CBRT=1; AC_SUBST([HAVE_CBRT])
156 HAVE_CBRTF=1; AC_SUBST([HAVE_CBRTF])
157 HAVE_CBRTL=1; AC_SUBST([HAVE_CBRTL])
158 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
159 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
160 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
161 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
162 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
163 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
164 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
165 HAVE_EXPM1=1; AC_SUBST([HAVE_EXPM1])
166 HAVE_EXPM1F=1; AC_SUBST([HAVE_EXPM1F])
167 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
168 HAVE_FABSL=1; AC_SUBST([HAVE_FABSL])
169 HAVE_FMA=1; AC_SUBST([HAVE_FMA])
170 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF])
171 HAVE_FMAL=1; AC_SUBST([HAVE_FMAL])
172 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
173 HAVE_FMODL=1; AC_SUBST([HAVE_FMODL])
174 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
175 HAVE_HYPOTF=1; AC_SUBST([HAVE_HYPOTF])
176 HAVE_HYPOTL=1; AC_SUBST([HAVE_HYPOTL])
177 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
178 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
179 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
180 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
181 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
182 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
183 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
184 HAVE_LOG10L=1; AC_SUBST([HAVE_LOG10L])
185 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
186 HAVE_MODFL=1; AC_SUBST([HAVE_MODFL])
187 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
188 HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER])
189 HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF])
190 HAVE_RINT=1; AC_SUBST([HAVE_RINT])
191 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
192 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
193 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
194 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
195 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
196 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
197 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
198 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
199 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
200 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
201 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
202 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
203 HAVE_DECL_CBRTF=1; AC_SUBST([HAVE_DECL_CBRTF])
204 HAVE_DECL_CBRTL=1; AC_SUBST([HAVE_DECL_CBRTL])
205 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
206 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
207 HAVE_DECL_COPYSIGNF=1; AC_SUBST([HAVE_DECL_COPYSIGNF])
208 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
209 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
210 HAVE_DECL_EXP2=1; AC_SUBST([HAVE_DECL_EXP2])
211 HAVE_DECL_EXP2F=1; AC_SUBST([HAVE_DECL_EXP2F])
212 HAVE_DECL_EXP2L=1; AC_SUBST([HAVE_DECL_EXP2L])
213 HAVE_DECL_EXPM1L=1; AC_SUBST([HAVE_DECL_EXPM1L])
214 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
215 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
216 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
217 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
218 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
219 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
220 HAVE_DECL_LOG10L=1; AC_SUBST([HAVE_DECL_LOG10L])
221 HAVE_DECL_REMAINDER=1; AC_SUBST([HAVE_DECL_REMAINDER])
222 HAVE_DECL_REMAINDERL=1; AC_SUBST([HAVE_DECL_REMAINDERL])
223 HAVE_DECL_RINTF=1; AC_SUBST([HAVE_DECL_RINTF])
224 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
225 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
226 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
227 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
228 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
229 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
230 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
231 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
232 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
233 REPLACE_CBRTF=0; AC_SUBST([REPLACE_CBRTF])
234 REPLACE_CBRTL=0; AC_SUBST([REPLACE_CBRTL])
235 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
236 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
237 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
238 REPLACE_EXPM1=0; AC_SUBST([REPLACE_EXPM1])
239 REPLACE_EXPM1F=0; AC_SUBST([REPLACE_EXPM1F])
240 REPLACE_EXP2=0; AC_SUBST([REPLACE_EXP2])
241 REPLACE_EXP2L=0; AC_SUBST([REPLACE_EXP2L])
242 REPLACE_FABSL=0; AC_SUBST([REPLACE_FABSL])
243 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
244 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
245 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
246 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA])
247 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF])
248 REPLACE_FMAL=0; AC_SUBST([REPLACE_FMAL])
249 REPLACE_FMOD=0; AC_SUBST([REPLACE_FMOD])
250 REPLACE_FMODF=0; AC_SUBST([REPLACE_FMODF])
251 REPLACE_FMODL=0; AC_SUBST([REPLACE_FMODL])
252 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
253 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
254 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
255 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
256 REPLACE_HYPOT=0; AC_SUBST([REPLACE_HYPOT])
257 REPLACE_HYPOTF=0; AC_SUBST([REPLACE_HYPOTF])
258 REPLACE_HYPOTL=0; AC_SUBST([REPLACE_HYPOTL])
259 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
260 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
261 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
262 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
263 REPLACE_LOG=0; AC_SUBST([REPLACE_LOG])
264 REPLACE_LOGF=0; AC_SUBST([REPLACE_LOGF])
265 REPLACE_MODF=0; AC_SUBST([REPLACE_MODF])
266 REPLACE_MODFF=0; AC_SUBST([REPLACE_MODFF])
267 REPLACE_MODFL=0; AC_SUBST([REPLACE_MODFL])
268 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
269 REPLACE_REMAINDER=0; AC_SUBST([REPLACE_REMAINDER])
270 REPLACE_REMAINDERF=0; AC_SUBST([REPLACE_REMAINDERF])
271 REPLACE_REMAINDERL=0; AC_SUBST([REPLACE_REMAINDERL])
272 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
273 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
274 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
275 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
276 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
277 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
278 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
279 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
282 # gl_LONG_DOUBLE_VS_DOUBLE
283 # determines whether 'long double' and 'double' have the same representation.
284 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
285 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
286 # The currently known platforms where this is the case are:
287 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
288 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
290 AC_CACHE_CHECK([whether long double and double are the same],
291 [gl_cv_long_double_equals_double],
293 [AC_LANG_PROGRAM([[#include <float.h>]],
294 [[typedef int check[sizeof (long double) == sizeof (double)
295 && LDBL_MANT_DIG == DBL_MANT_DIG
296 && LDBL_MAX_EXP == DBL_MAX_EXP
297 && LDBL_MIN_EXP == DBL_MIN_EXP
300 [gl_cv_long_double_equals_double=yes],
301 [gl_cv_long_double_equals_double=no])
303 if test $gl_cv_long_double_equals_double = yes; then
304 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
305 [Define to 1 if 'long double' and 'double' have the same representation.])
306 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
308 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
310 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])