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 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_LOG1P=0; AC_SUBST([GNULIB_LOG1P])
123 GNULIB_MODF=0; AC_SUBST([GNULIB_MODF])
124 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
125 GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL])
126 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
127 GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER])
128 GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF])
129 GNULIB_REMAINDERL=0; AC_SUBST([GNULIB_REMAINDERL])
130 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
131 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
132 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
133 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
134 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
135 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
136 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
137 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
138 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
139 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
140 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
141 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
142 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
143 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
144 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
145 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
146 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
147 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
148 dnl Assume proper GNU behavior unless another module says otherwise.
149 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
150 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
151 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
152 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
153 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
154 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
155 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
156 HAVE_CBRT=1; AC_SUBST([HAVE_CBRT])
157 HAVE_CBRTF=1; AC_SUBST([HAVE_CBRTF])
158 HAVE_CBRTL=1; AC_SUBST([HAVE_CBRTL])
159 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
160 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
161 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
162 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
163 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
164 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
165 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
166 HAVE_EXPM1=1; AC_SUBST([HAVE_EXPM1])
167 HAVE_EXPM1F=1; AC_SUBST([HAVE_EXPM1F])
168 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
169 HAVE_FABSL=1; AC_SUBST([HAVE_FABSL])
170 HAVE_FMA=1; AC_SUBST([HAVE_FMA])
171 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF])
172 HAVE_FMAL=1; AC_SUBST([HAVE_FMAL])
173 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
174 HAVE_FMODL=1; AC_SUBST([HAVE_FMODL])
175 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
176 HAVE_HYPOTF=1; AC_SUBST([HAVE_HYPOTF])
177 HAVE_HYPOTL=1; AC_SUBST([HAVE_HYPOTL])
178 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
179 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
180 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
181 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
182 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
183 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
184 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
185 HAVE_LOG10L=1; AC_SUBST([HAVE_LOG10L])
186 HAVE_LOG1P=1; AC_SUBST([HAVE_LOG1P])
187 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
188 HAVE_MODFL=1; AC_SUBST([HAVE_MODFL])
189 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
190 HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER])
191 HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF])
192 HAVE_RINT=1; AC_SUBST([HAVE_RINT])
193 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
194 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
195 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
196 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
197 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
198 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
199 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
200 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
201 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
202 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
203 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
204 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
205 HAVE_DECL_CBRTF=1; AC_SUBST([HAVE_DECL_CBRTF])
206 HAVE_DECL_CBRTL=1; AC_SUBST([HAVE_DECL_CBRTL])
207 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
208 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
209 HAVE_DECL_COPYSIGNF=1; AC_SUBST([HAVE_DECL_COPYSIGNF])
210 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
211 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
212 HAVE_DECL_EXP2=1; AC_SUBST([HAVE_DECL_EXP2])
213 HAVE_DECL_EXP2F=1; AC_SUBST([HAVE_DECL_EXP2F])
214 HAVE_DECL_EXP2L=1; AC_SUBST([HAVE_DECL_EXP2L])
215 HAVE_DECL_EXPM1L=1; AC_SUBST([HAVE_DECL_EXPM1L])
216 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
217 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
218 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
219 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
220 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
221 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
222 HAVE_DECL_LOG10L=1; AC_SUBST([HAVE_DECL_LOG10L])
223 HAVE_DECL_REMAINDER=1; AC_SUBST([HAVE_DECL_REMAINDER])
224 HAVE_DECL_REMAINDERL=1; AC_SUBST([HAVE_DECL_REMAINDERL])
225 HAVE_DECL_RINTF=1; AC_SUBST([HAVE_DECL_RINTF])
226 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
227 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
228 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
229 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
230 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
231 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
232 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
233 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
234 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
235 REPLACE_CBRTF=0; AC_SUBST([REPLACE_CBRTF])
236 REPLACE_CBRTL=0; AC_SUBST([REPLACE_CBRTL])
237 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
238 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
239 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
240 REPLACE_EXPM1=0; AC_SUBST([REPLACE_EXPM1])
241 REPLACE_EXPM1F=0; AC_SUBST([REPLACE_EXPM1F])
242 REPLACE_EXP2=0; AC_SUBST([REPLACE_EXP2])
243 REPLACE_EXP2L=0; AC_SUBST([REPLACE_EXP2L])
244 REPLACE_FABSL=0; AC_SUBST([REPLACE_FABSL])
245 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
246 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
247 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
248 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA])
249 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF])
250 REPLACE_FMAL=0; AC_SUBST([REPLACE_FMAL])
251 REPLACE_FMOD=0; AC_SUBST([REPLACE_FMOD])
252 REPLACE_FMODF=0; AC_SUBST([REPLACE_FMODF])
253 REPLACE_FMODL=0; AC_SUBST([REPLACE_FMODL])
254 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
255 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
256 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
257 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
258 REPLACE_HYPOT=0; AC_SUBST([REPLACE_HYPOT])
259 REPLACE_HYPOTF=0; AC_SUBST([REPLACE_HYPOTF])
260 REPLACE_HYPOTL=0; AC_SUBST([REPLACE_HYPOTL])
261 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
262 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
263 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
264 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
265 REPLACE_LOG=0; AC_SUBST([REPLACE_LOG])
266 REPLACE_LOGF=0; AC_SUBST([REPLACE_LOGF])
267 REPLACE_LOGL=0; AC_SUBST([REPLACE_LOGL])
268 REPLACE_MODF=0; AC_SUBST([REPLACE_MODF])
269 REPLACE_MODFF=0; AC_SUBST([REPLACE_MODFF])
270 REPLACE_MODFL=0; AC_SUBST([REPLACE_MODFL])
271 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
272 REPLACE_REMAINDER=0; AC_SUBST([REPLACE_REMAINDER])
273 REPLACE_REMAINDERF=0; AC_SUBST([REPLACE_REMAINDERF])
274 REPLACE_REMAINDERL=0; AC_SUBST([REPLACE_REMAINDERL])
275 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
276 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
277 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
278 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
279 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
280 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
281 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
282 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
285 # gl_LONG_DOUBLE_VS_DOUBLE
286 # determines whether 'long double' and 'double' have the same representation.
287 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
288 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
289 # The currently known platforms where this is the case are:
290 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
291 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
293 AC_CACHE_CHECK([whether long double and double are the same],
294 [gl_cv_long_double_equals_double],
296 [AC_LANG_PROGRAM([[#include <float.h>]],
297 [[typedef int check[sizeof (long double) == sizeof (double)
298 && LDBL_MANT_DIG == DBL_MANT_DIG
299 && LDBL_MAX_EXP == DBL_MAX_EXP
300 && LDBL_MIN_EXP == DBL_MIN_EXP
303 [gl_cv_long_double_equals_double=yes],
304 [gl_cv_long_double_equals_double=no])
306 if test $gl_cv_long_double_equals_double = yes; then
307 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
308 [Define to 1 if 'long double' and 'double' have the same representation.])
309 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
311 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
313 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])