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