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