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 ceilf ceill copysign copysignf copysignl cosf cosl coshf
44 expf expl 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_CEIL=0; AC_SUBST([GNULIB_CEIL])
71 GNULIB_CEILF=0; AC_SUBST([GNULIB_CEILF])
72 GNULIB_CEILL=0; AC_SUBST([GNULIB_CEILL])
73 GNULIB_COPYSIGN=0; AC_SUBST([GNULIB_COPYSIGN])
74 GNULIB_COPYSIGNF=0; AC_SUBST([GNULIB_COPYSIGNF])
75 GNULIB_COPYSIGNL=0; AC_SUBST([GNULIB_COPYSIGNL])
76 GNULIB_COSF=0; AC_SUBST([GNULIB_COSF])
77 GNULIB_COSL=0; AC_SUBST([GNULIB_COSL])
78 GNULIB_COSHF=0; AC_SUBST([GNULIB_COSHF])
79 GNULIB_EXPF=0; AC_SUBST([GNULIB_EXPF])
80 GNULIB_EXPL=0; AC_SUBST([GNULIB_EXPL])
81 GNULIB_FABSF=0; AC_SUBST([GNULIB_FABSF])
82 GNULIB_FABSL=0; AC_SUBST([GNULIB_FABSL])
83 GNULIB_FLOOR=0; AC_SUBST([GNULIB_FLOOR])
84 GNULIB_FLOORF=0; AC_SUBST([GNULIB_FLOORF])
85 GNULIB_FLOORL=0; AC_SUBST([GNULIB_FLOORL])
86 GNULIB_FMA=0; AC_SUBST([GNULIB_FMA])
87 GNULIB_FMAF=0; AC_SUBST([GNULIB_FMAF])
88 GNULIB_FMAL=0; AC_SUBST([GNULIB_FMAL])
89 GNULIB_FMOD=0; AC_SUBST([GNULIB_FMOD])
90 GNULIB_FMODF=0; AC_SUBST([GNULIB_FMODF])
91 GNULIB_FMODL=0; AC_SUBST([GNULIB_FMODL])
92 GNULIB_FREXPF=0; AC_SUBST([GNULIB_FREXPF])
93 GNULIB_FREXP=0; AC_SUBST([GNULIB_FREXP])
94 GNULIB_FREXPL=0; AC_SUBST([GNULIB_FREXPL])
95 GNULIB_HYPOT=0; AC_SUBST([GNULIB_HYPOT])
96 GNULIB_HYPOTF=0; AC_SUBST([GNULIB_HYPOTF])
97 GNULIB_HYPOTL=0; AC_SUBST([GNULIB_HYPOTL])
98 GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
99 GNULIB_ISINF=0; AC_SUBST([GNULIB_ISINF])
100 GNULIB_ISNAN=0; AC_SUBST([GNULIB_ISNAN])
101 GNULIB_ISNANF=0; AC_SUBST([GNULIB_ISNANF])
102 GNULIB_ISNAND=0; AC_SUBST([GNULIB_ISNAND])
103 GNULIB_ISNANL=0; AC_SUBST([GNULIB_ISNANL])
104 GNULIB_LDEXPF=0; AC_SUBST([GNULIB_LDEXPF])
105 GNULIB_LDEXPL=0; AC_SUBST([GNULIB_LDEXPL])
106 GNULIB_LOGB=0; AC_SUBST([GNULIB_LOGB])
107 GNULIB_LOGF=0; AC_SUBST([GNULIB_LOGF])
108 GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL])
109 GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F])
110 GNULIB_LOG10L=0; AC_SUBST([GNULIB_LOG10L])
111 GNULIB_MODF=0; AC_SUBST([GNULIB_MODF])
112 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
113 GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL])
114 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
115 GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER])
116 GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF])
117 GNULIB_REMAINDERL=0; AC_SUBST([GNULIB_REMAINDERL])
118 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
119 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
120 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
121 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
122 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
123 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
124 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
125 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
126 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
127 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
128 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
129 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
130 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
131 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
132 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
133 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
134 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
135 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
136 dnl Assume proper GNU behavior unless another module says otherwise.
137 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
138 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
139 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
140 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
141 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
142 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
143 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
144 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
145 HAVE_COPYSIGNF=1; AC_SUBST([HAVE_COPYSIGNF])
146 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
147 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
148 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
149 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
150 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
151 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
152 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
153 HAVE_FABSL=1; AC_SUBST([HAVE_FABSL])
154 HAVE_FMA=1; AC_SUBST([HAVE_FMA])
155 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF])
156 HAVE_FMAL=1; AC_SUBST([HAVE_FMAL])
157 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
158 HAVE_FMODL=1; AC_SUBST([HAVE_FMODL])
159 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
160 HAVE_HYPOTF=1; AC_SUBST([HAVE_HYPOTF])
161 HAVE_HYPOTL=1; AC_SUBST([HAVE_HYPOTL])
162 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
163 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
164 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
165 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
166 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
167 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
168 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
169 HAVE_LOG10L=1; AC_SUBST([HAVE_LOG10L])
170 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
171 HAVE_MODFL=1; AC_SUBST([HAVE_MODFL])
172 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
173 HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER])
174 HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF])
175 HAVE_REMAINDERL=1; AC_SUBST([HAVE_REMAINDERL])
176 HAVE_RINT=1; AC_SUBST([HAVE_RINT])
177 HAVE_RINTF=1; AC_SUBST([HAVE_RINTF])
178 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
179 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
180 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
181 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
182 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
183 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
184 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
185 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
186 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
187 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
188 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
189 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
190 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
191 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
192 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
193 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
194 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
195 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
196 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
197 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
198 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
199 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
200 HAVE_DECL_LOG10L=1; AC_SUBST([HAVE_DECL_LOG10L])
201 HAVE_DECL_REMAINDER=1; AC_SUBST([HAVE_DECL_REMAINDER])
202 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
203 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
204 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
205 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
206 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
207 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
208 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
209 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
210 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
211 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
212 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
213 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
214 REPLACE_FABSL=0; AC_SUBST([REPLACE_FABSL])
215 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
216 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
217 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
218 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA])
219 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF])
220 REPLACE_FMAL=0; AC_SUBST([REPLACE_FMAL])
221 REPLACE_FMOD=0; AC_SUBST([REPLACE_FMOD])
222 REPLACE_FMODF=0; AC_SUBST([REPLACE_FMODF])
223 REPLACE_FMODL=0; AC_SUBST([REPLACE_FMODL])
224 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
225 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
226 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
227 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
228 REPLACE_HYPOT=0; AC_SUBST([REPLACE_HYPOT])
229 REPLACE_HYPOTF=0; AC_SUBST([REPLACE_HYPOTF])
230 REPLACE_HYPOTL=0; AC_SUBST([REPLACE_HYPOTL])
231 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
232 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
233 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
234 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
235 REPLACE_MODF=0; AC_SUBST([REPLACE_MODF])
236 REPLACE_MODFF=0; AC_SUBST([REPLACE_MODFF])
237 REPLACE_MODFL=0; AC_SUBST([REPLACE_MODFL])
238 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
239 REPLACE_REMAINDER=0; AC_SUBST([REPLACE_REMAINDER])
240 REPLACE_REMAINDERF=0; AC_SUBST([REPLACE_REMAINDERF])
241 REPLACE_REMAINDERL=0; AC_SUBST([REPLACE_REMAINDERL])
242 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
243 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
244 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
245 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
246 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
247 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
248 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
249 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
252 # gl_LONG_DOUBLE_VS_DOUBLE
253 # determines whether 'long double' and 'double' have the same representation.
254 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
255 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
256 # The currently known platforms where this is the case are:
257 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
258 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
260 AC_CACHE_CHECK([whether long double and double are the same],
261 [gl_cv_long_double_equals_double],
263 [AC_LANG_PROGRAM([[#include <float.h>]],
264 [[typedef int check[sizeof (long double) == sizeof (double)
265 && LDBL_MANT_DIG == DBL_MANT_DIG
266 && LDBL_MAX_EXP == DBL_MAX_EXP
267 && LDBL_MIN_EXP == DBL_MIN_EXP
270 [gl_cv_long_double_equals_double=yes],
271 [gl_cv_long_double_equals_double=no])
273 if test $gl_cv_long_double_equals_double = yes; then
274 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
275 [Define to 1 if 'long double' and 'double' have the same representation.])
276 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
278 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
280 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])