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 log1p log1pf log1pl
49 remainder remainderf remainderl
50 rint rintf rintl round roundf roundl sinf sinl sinhf sqrtf sqrtl
51 tanf tanl tanhf trunc truncf truncl])
54 AC_DEFUN([gl_MATH_MODULE_INDICATOR],
56 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
57 AC_REQUIRE([gl_MATH_H_DEFAULTS])
58 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
59 dnl Define it also as a C macro, for the benefit of the unit tests.
60 gl_MODULE_INDICATOR_FOR_TESTS([$1])
63 AC_DEFUN([gl_MATH_H_DEFAULTS],
65 GNULIB_ACOSF=0; AC_SUBST([GNULIB_ACOSF])
66 GNULIB_ACOSL=0; AC_SUBST([GNULIB_ACOSL])
67 GNULIB_ASINF=0; AC_SUBST([GNULIB_ASINF])
68 GNULIB_ASINL=0; AC_SUBST([GNULIB_ASINL])
69 GNULIB_ATANF=0; AC_SUBST([GNULIB_ATANF])
70 GNULIB_ATANL=0; AC_SUBST([GNULIB_ATANL])
71 GNULIB_ATAN2F=0; AC_SUBST([GNULIB_ATAN2F])
72 GNULIB_CBRT=0; AC_SUBST([GNULIB_CBRT])
73 GNULIB_CBRTF=0; AC_SUBST([GNULIB_CBRTF])
74 GNULIB_CBRTL=0; AC_SUBST([GNULIB_CBRTL])
75 GNULIB_CEIL=0; AC_SUBST([GNULIB_CEIL])
76 GNULIB_CEILF=0; AC_SUBST([GNULIB_CEILF])
77 GNULIB_CEILL=0; AC_SUBST([GNULIB_CEILL])
78 GNULIB_COPYSIGN=0; AC_SUBST([GNULIB_COPYSIGN])
79 GNULIB_COPYSIGNF=0; AC_SUBST([GNULIB_COPYSIGNF])
80 GNULIB_COPYSIGNL=0; AC_SUBST([GNULIB_COPYSIGNL])
81 GNULIB_COSF=0; AC_SUBST([GNULIB_COSF])
82 GNULIB_COSL=0; AC_SUBST([GNULIB_COSL])
83 GNULIB_COSHF=0; AC_SUBST([GNULIB_COSHF])
84 GNULIB_EXPF=0; AC_SUBST([GNULIB_EXPF])
85 GNULIB_EXPL=0; AC_SUBST([GNULIB_EXPL])
86 GNULIB_EXP2=0; AC_SUBST([GNULIB_EXP2])
87 GNULIB_EXP2F=0; AC_SUBST([GNULIB_EXP2F])
88 GNULIB_EXP2L=0; AC_SUBST([GNULIB_EXP2L])
89 GNULIB_EXPM1=0; AC_SUBST([GNULIB_EXPM1])
90 GNULIB_EXPM1F=0; AC_SUBST([GNULIB_EXPM1F])
91 GNULIB_EXPM1L=0; AC_SUBST([GNULIB_EXPM1L])
92 GNULIB_FABSF=0; AC_SUBST([GNULIB_FABSF])
93 GNULIB_FABSL=0; AC_SUBST([GNULIB_FABSL])
94 GNULIB_FLOOR=0; AC_SUBST([GNULIB_FLOOR])
95 GNULIB_FLOORF=0; AC_SUBST([GNULIB_FLOORF])
96 GNULIB_FLOORL=0; AC_SUBST([GNULIB_FLOORL])
97 GNULIB_FMA=0; AC_SUBST([GNULIB_FMA])
98 GNULIB_FMAF=0; AC_SUBST([GNULIB_FMAF])
99 GNULIB_FMAL=0; AC_SUBST([GNULIB_FMAL])
100 GNULIB_FMOD=0; AC_SUBST([GNULIB_FMOD])
101 GNULIB_FMODF=0; AC_SUBST([GNULIB_FMODF])
102 GNULIB_FMODL=0; AC_SUBST([GNULIB_FMODL])
103 GNULIB_FREXPF=0; AC_SUBST([GNULIB_FREXPF])
104 GNULIB_FREXP=0; AC_SUBST([GNULIB_FREXP])
105 GNULIB_FREXPL=0; AC_SUBST([GNULIB_FREXPL])
106 GNULIB_HYPOT=0; AC_SUBST([GNULIB_HYPOT])
107 GNULIB_HYPOTF=0; AC_SUBST([GNULIB_HYPOTF])
108 GNULIB_HYPOTL=0; AC_SUBST([GNULIB_HYPOTL])
109 GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
110 GNULIB_ISINF=0; AC_SUBST([GNULIB_ISINF])
111 GNULIB_ISNAN=0; AC_SUBST([GNULIB_ISNAN])
112 GNULIB_ISNANF=0; AC_SUBST([GNULIB_ISNANF])
113 GNULIB_ISNAND=0; AC_SUBST([GNULIB_ISNAND])
114 GNULIB_ISNANL=0; AC_SUBST([GNULIB_ISNANL])
115 GNULIB_LDEXPF=0; AC_SUBST([GNULIB_LDEXPF])
116 GNULIB_LDEXPL=0; AC_SUBST([GNULIB_LDEXPL])
117 GNULIB_LOGB=0; AC_SUBST([GNULIB_LOGB])
118 GNULIB_LOG=0; AC_SUBST([GNULIB_LOG])
119 GNULIB_LOGF=0; AC_SUBST([GNULIB_LOGF])
120 GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL])
121 GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F])
122 GNULIB_LOG10L=0; AC_SUBST([GNULIB_LOG10L])
123 GNULIB_LOG1P=0; AC_SUBST([GNULIB_LOG1P])
124 GNULIB_LOG1PF=0; AC_SUBST([GNULIB_LOG1PF])
125 GNULIB_LOG1PL=0; AC_SUBST([GNULIB_LOG1PL])
126 GNULIB_MODF=0; AC_SUBST([GNULIB_MODF])
127 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
128 GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL])
129 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
130 GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER])
131 GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF])
132 GNULIB_REMAINDERL=0; AC_SUBST([GNULIB_REMAINDERL])
133 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
134 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
135 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
136 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
137 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
138 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
139 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
140 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
141 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
142 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
143 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
144 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
145 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
146 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
147 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
148 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
149 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
150 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
151 dnl Assume proper GNU behavior unless another module says otherwise.
152 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
153 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
154 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
155 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
156 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
157 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
158 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
159 HAVE_CBRT=1; AC_SUBST([HAVE_CBRT])
160 HAVE_CBRTF=1; AC_SUBST([HAVE_CBRTF])
161 HAVE_CBRTL=1; AC_SUBST([HAVE_CBRTL])
162 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
163 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
164 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
165 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
166 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
167 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
168 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
169 HAVE_EXPM1=1; AC_SUBST([HAVE_EXPM1])
170 HAVE_EXPM1F=1; AC_SUBST([HAVE_EXPM1F])
171 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
172 HAVE_FABSL=1; AC_SUBST([HAVE_FABSL])
173 HAVE_FMA=1; AC_SUBST([HAVE_FMA])
174 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF])
175 HAVE_FMAL=1; AC_SUBST([HAVE_FMAL])
176 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
177 HAVE_FMODL=1; AC_SUBST([HAVE_FMODL])
178 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
179 HAVE_HYPOTF=1; AC_SUBST([HAVE_HYPOTF])
180 HAVE_HYPOTL=1; AC_SUBST([HAVE_HYPOTL])
181 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
182 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
183 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
184 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
185 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
186 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
187 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
188 HAVE_LOG10L=1; AC_SUBST([HAVE_LOG10L])
189 HAVE_LOG1P=1; AC_SUBST([HAVE_LOG1P])
190 HAVE_LOG1PF=1; AC_SUBST([HAVE_LOG1PF])
191 HAVE_LOG1PL=1; AC_SUBST([HAVE_LOG1PL])
192 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
193 HAVE_MODFL=1; AC_SUBST([HAVE_MODFL])
194 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
195 HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER])
196 HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF])
197 HAVE_RINT=1; AC_SUBST([HAVE_RINT])
198 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
199 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
200 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
201 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
202 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
203 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
204 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
205 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
206 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
207 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
208 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
209 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
210 HAVE_DECL_CBRTF=1; AC_SUBST([HAVE_DECL_CBRTF])
211 HAVE_DECL_CBRTL=1; AC_SUBST([HAVE_DECL_CBRTL])
212 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
213 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
214 HAVE_DECL_COPYSIGNF=1; AC_SUBST([HAVE_DECL_COPYSIGNF])
215 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
216 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
217 HAVE_DECL_EXP2=1; AC_SUBST([HAVE_DECL_EXP2])
218 HAVE_DECL_EXP2F=1; AC_SUBST([HAVE_DECL_EXP2F])
219 HAVE_DECL_EXP2L=1; AC_SUBST([HAVE_DECL_EXP2L])
220 HAVE_DECL_EXPM1L=1; AC_SUBST([HAVE_DECL_EXPM1L])
221 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
222 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
223 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
224 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
225 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
226 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
227 HAVE_DECL_LOG10L=1; AC_SUBST([HAVE_DECL_LOG10L])
228 HAVE_DECL_REMAINDER=1; AC_SUBST([HAVE_DECL_REMAINDER])
229 HAVE_DECL_REMAINDERL=1; AC_SUBST([HAVE_DECL_REMAINDERL])
230 HAVE_DECL_RINTF=1; AC_SUBST([HAVE_DECL_RINTF])
231 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
232 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
233 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
234 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
235 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
236 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
237 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
238 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
239 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
240 REPLACE_CBRTF=0; AC_SUBST([REPLACE_CBRTF])
241 REPLACE_CBRTL=0; AC_SUBST([REPLACE_CBRTL])
242 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
243 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
244 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
245 REPLACE_EXPM1=0; AC_SUBST([REPLACE_EXPM1])
246 REPLACE_EXPM1F=0; AC_SUBST([REPLACE_EXPM1F])
247 REPLACE_EXP2=0; AC_SUBST([REPLACE_EXP2])
248 REPLACE_EXP2L=0; AC_SUBST([REPLACE_EXP2L])
249 REPLACE_FABSL=0; AC_SUBST([REPLACE_FABSL])
250 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
251 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
252 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
253 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA])
254 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF])
255 REPLACE_FMAL=0; AC_SUBST([REPLACE_FMAL])
256 REPLACE_FMOD=0; AC_SUBST([REPLACE_FMOD])
257 REPLACE_FMODF=0; AC_SUBST([REPLACE_FMODF])
258 REPLACE_FMODL=0; AC_SUBST([REPLACE_FMODL])
259 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
260 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
261 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
262 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
263 REPLACE_HYPOT=0; AC_SUBST([REPLACE_HYPOT])
264 REPLACE_HYPOTF=0; AC_SUBST([REPLACE_HYPOTF])
265 REPLACE_HYPOTL=0; AC_SUBST([REPLACE_HYPOTL])
266 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
267 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
268 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
269 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
270 REPLACE_LOG=0; AC_SUBST([REPLACE_LOG])
271 REPLACE_LOGF=0; AC_SUBST([REPLACE_LOGF])
272 REPLACE_LOGL=0; AC_SUBST([REPLACE_LOGL])
273 REPLACE_LOG1P=0; AC_SUBST([REPLACE_LOG1P])
274 REPLACE_LOG1PF=0; AC_SUBST([REPLACE_LOG1PF])
275 REPLACE_LOG1PL=0; AC_SUBST([REPLACE_LOG1PL])
276 REPLACE_MODF=0; AC_SUBST([REPLACE_MODF])
277 REPLACE_MODFF=0; AC_SUBST([REPLACE_MODFF])
278 REPLACE_MODFL=0; AC_SUBST([REPLACE_MODFL])
279 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
280 REPLACE_REMAINDER=0; AC_SUBST([REPLACE_REMAINDER])
281 REPLACE_REMAINDERF=0; AC_SUBST([REPLACE_REMAINDERF])
282 REPLACE_REMAINDERL=0; AC_SUBST([REPLACE_REMAINDERL])
283 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
284 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
285 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
286 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
287 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
288 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
289 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
290 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
293 # gl_LONG_DOUBLE_VS_DOUBLE
294 # determines whether 'long double' and 'double' have the same representation.
295 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
296 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
297 # The currently known platforms where this is the case are:
298 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
299 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
301 AC_CACHE_CHECK([whether long double and double are the same],
302 [gl_cv_long_double_equals_double],
304 [AC_LANG_PROGRAM([[#include <float.h>]],
305 [[typedef int check[sizeof (long double) == sizeof (double)
306 && LDBL_MANT_DIG == DBL_MANT_DIG
307 && LDBL_MAX_EXP == DBL_MAX_EXP
308 && LDBL_MIN_EXP == DBL_MIN_EXP
311 [gl_cv_long_double_equals_double=yes],
312 [gl_cv_long_double_equals_double=no])
314 if test $gl_cv_long_double_equals_double = yes; then
315 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
316 [Define to 1 if 'long double' and 'double' have the same representation.])
317 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
319 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
321 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])