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 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_LOGF=0; AC_SUBST([GNULIB_LOGF])
118 GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL])
119 GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F])
120 GNULIB_LOG10L=0; AC_SUBST([GNULIB_LOG10L])
121 GNULIB_MODF=0; AC_SUBST([GNULIB_MODF])
122 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
123 GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL])
124 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
125 GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER])
126 GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF])
127 GNULIB_REMAINDERL=0; AC_SUBST([GNULIB_REMAINDERL])
128 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
129 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
130 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
131 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
132 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
133 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
134 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
135 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
136 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
137 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
138 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
139 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
140 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
141 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
142 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
143 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
144 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
145 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
146 dnl Assume proper GNU behavior unless another module says otherwise.
147 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
148 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
149 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
150 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
151 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
152 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
153 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
154 HAVE_CBRT=1; AC_SUBST([HAVE_CBRT])
155 HAVE_CBRTF=1; AC_SUBST([HAVE_CBRTF])
156 HAVE_CBRTL=1; AC_SUBST([HAVE_CBRTL])
157 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
158 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
159 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
160 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
161 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
162 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
163 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
164 HAVE_EXPM1=1; AC_SUBST([HAVE_EXPM1])
165 HAVE_EXPM1F=1; AC_SUBST([HAVE_EXPM1F])
166 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
167 HAVE_FABSL=1; AC_SUBST([HAVE_FABSL])
168 HAVE_FMA=1; AC_SUBST([HAVE_FMA])
169 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF])
170 HAVE_FMAL=1; AC_SUBST([HAVE_FMAL])
171 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
172 HAVE_FMODL=1; AC_SUBST([HAVE_FMODL])
173 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
174 HAVE_HYPOTF=1; AC_SUBST([HAVE_HYPOTF])
175 HAVE_HYPOTL=1; AC_SUBST([HAVE_HYPOTL])
176 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
177 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
178 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
179 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
180 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
181 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
182 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
183 HAVE_LOG10L=1; AC_SUBST([HAVE_LOG10L])
184 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
185 HAVE_MODFL=1; AC_SUBST([HAVE_MODFL])
186 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
187 HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER])
188 HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF])
189 HAVE_RINT=1; AC_SUBST([HAVE_RINT])
190 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
191 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
192 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
193 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
194 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
195 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
196 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
197 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
198 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
199 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
200 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
201 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
202 HAVE_DECL_CBRTF=1; AC_SUBST([HAVE_DECL_CBRTF])
203 HAVE_DECL_CBRTL=1; AC_SUBST([HAVE_DECL_CBRTL])
204 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
205 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
206 HAVE_DECL_COPYSIGNF=1; AC_SUBST([HAVE_DECL_COPYSIGNF])
207 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
208 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
209 HAVE_DECL_EXP2=1; AC_SUBST([HAVE_DECL_EXP2])
210 HAVE_DECL_EXP2F=1; AC_SUBST([HAVE_DECL_EXP2F])
211 HAVE_DECL_EXP2L=1; AC_SUBST([HAVE_DECL_EXP2L])
212 HAVE_DECL_EXPM1L=1; AC_SUBST([HAVE_DECL_EXPM1L])
213 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
214 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
215 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
216 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
217 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
218 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
219 HAVE_DECL_LOG10L=1; AC_SUBST([HAVE_DECL_LOG10L])
220 HAVE_DECL_REMAINDER=1; AC_SUBST([HAVE_DECL_REMAINDER])
221 HAVE_DECL_REMAINDERL=1; AC_SUBST([HAVE_DECL_REMAINDERL])
222 HAVE_DECL_RINTF=1; AC_SUBST([HAVE_DECL_RINTF])
223 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
224 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
225 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
226 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
227 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
228 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
229 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
230 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
231 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
232 REPLACE_CBRTF=0; AC_SUBST([REPLACE_CBRTF])
233 REPLACE_CBRTL=0; AC_SUBST([REPLACE_CBRTL])
234 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
235 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
236 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
237 REPLACE_EXPM1=0; AC_SUBST([REPLACE_EXPM1])
238 REPLACE_EXPM1F=0; AC_SUBST([REPLACE_EXPM1F])
239 REPLACE_EXP2=0; AC_SUBST([REPLACE_EXP2])
240 REPLACE_EXP2L=0; AC_SUBST([REPLACE_EXP2L])
241 REPLACE_FABSL=0; AC_SUBST([REPLACE_FABSL])
242 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
243 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
244 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
245 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA])
246 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF])
247 REPLACE_FMAL=0; AC_SUBST([REPLACE_FMAL])
248 REPLACE_FMOD=0; AC_SUBST([REPLACE_FMOD])
249 REPLACE_FMODF=0; AC_SUBST([REPLACE_FMODF])
250 REPLACE_FMODL=0; AC_SUBST([REPLACE_FMODL])
251 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
252 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
253 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
254 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
255 REPLACE_HYPOT=0; AC_SUBST([REPLACE_HYPOT])
256 REPLACE_HYPOTF=0; AC_SUBST([REPLACE_HYPOTF])
257 REPLACE_HYPOTL=0; AC_SUBST([REPLACE_HYPOTL])
258 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
259 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
260 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
261 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
262 REPLACE_MODF=0; AC_SUBST([REPLACE_MODF])
263 REPLACE_MODFF=0; AC_SUBST([REPLACE_MODFF])
264 REPLACE_MODFL=0; AC_SUBST([REPLACE_MODFL])
265 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
266 REPLACE_REMAINDER=0; AC_SUBST([REPLACE_REMAINDER])
267 REPLACE_REMAINDERF=0; AC_SUBST([REPLACE_REMAINDERF])
268 REPLACE_REMAINDERL=0; AC_SUBST([REPLACE_REMAINDERL])
269 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
270 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
271 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
272 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
273 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
274 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
275 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
276 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
279 # gl_LONG_DOUBLE_VS_DOUBLE
280 # determines whether 'long double' and 'double' have the same representation.
281 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
282 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
283 # The currently known platforms where this is the case are:
284 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
285 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
287 AC_CACHE_CHECK([whether long double and double are the same],
288 [gl_cv_long_double_equals_double],
290 [AC_LANG_PROGRAM([[#include <float.h>]],
291 [[typedef int check[sizeof (long double) == sizeof (double)
292 && LDBL_MANT_DIG == DBL_MANT_DIG
293 && LDBL_MAX_EXP == DBL_MAX_EXP
294 && LDBL_MIN_EXP == DBL_MIN_EXP
297 [gl_cv_long_double_equals_double=yes],
298 [gl_cv_long_double_equals_double=no])
300 if test $gl_cv_long_double_equals_double = yes; then
301 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
302 [Define to 1 if 'long double' and 'double' have the same representation.])
303 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
305 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
307 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])