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 fmodf fmodl frexpf frexpl
45 ldexpf ldexpl logb logf logl log10f modff modfl powf
47 rint rintf rintl round roundf roundl sinf sinl sinhf sqrtf sqrtl
48 tanf tanl tanhf trunc truncf truncl])
51 AC_DEFUN([gl_MATH_MODULE_INDICATOR],
53 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
54 AC_REQUIRE([gl_MATH_H_DEFAULTS])
55 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
56 dnl Define it also as a C macro, for the benefit of the unit tests.
57 gl_MODULE_INDICATOR_FOR_TESTS([$1])
60 AC_DEFUN([gl_MATH_H_DEFAULTS],
62 GNULIB_ACOSF=0; AC_SUBST([GNULIB_ACOSF])
63 GNULIB_ACOSL=0; AC_SUBST([GNULIB_ACOSL])
64 GNULIB_ASINF=0; AC_SUBST([GNULIB_ASINF])
65 GNULIB_ASINL=0; AC_SUBST([GNULIB_ASINL])
66 GNULIB_ATANF=0; AC_SUBST([GNULIB_ATANF])
67 GNULIB_ATANL=0; AC_SUBST([GNULIB_ATANL])
68 GNULIB_ATAN2F=0; AC_SUBST([GNULIB_ATAN2F])
69 GNULIB_CEIL=0; AC_SUBST([GNULIB_CEIL])
70 GNULIB_CEILF=0; AC_SUBST([GNULIB_CEILF])
71 GNULIB_CEILL=0; AC_SUBST([GNULIB_CEILL])
72 GNULIB_COPYSIGN=0; AC_SUBST([GNULIB_COPYSIGN])
73 GNULIB_COPYSIGNF=0; AC_SUBST([GNULIB_COPYSIGNF])
74 GNULIB_COPYSIGNL=0; AC_SUBST([GNULIB_COPYSIGNL])
75 GNULIB_COSF=0; AC_SUBST([GNULIB_COSF])
76 GNULIB_COSL=0; AC_SUBST([GNULIB_COSL])
77 GNULIB_COSHF=0; AC_SUBST([GNULIB_COSHF])
78 GNULIB_EXPF=0; AC_SUBST([GNULIB_EXPF])
79 GNULIB_EXPL=0; AC_SUBST([GNULIB_EXPL])
80 GNULIB_FABSF=0; AC_SUBST([GNULIB_FABSF])
81 GNULIB_FABSL=0; AC_SUBST([GNULIB_FABSL])
82 GNULIB_FLOOR=0; AC_SUBST([GNULIB_FLOOR])
83 GNULIB_FLOORF=0; AC_SUBST([GNULIB_FLOORF])
84 GNULIB_FLOORL=0; AC_SUBST([GNULIB_FLOORL])
85 GNULIB_FMA=0; AC_SUBST([GNULIB_FMA])
86 GNULIB_FMAF=0; AC_SUBST([GNULIB_FMAF])
87 GNULIB_FMAL=0; AC_SUBST([GNULIB_FMAL])
88 GNULIB_FMODF=0; AC_SUBST([GNULIB_FMODF])
89 GNULIB_FMODL=0; AC_SUBST([GNULIB_FMODL])
90 GNULIB_FREXPF=0; AC_SUBST([GNULIB_FREXPF])
91 GNULIB_FREXP=0; AC_SUBST([GNULIB_FREXP])
92 GNULIB_FREXPL=0; AC_SUBST([GNULIB_FREXPL])
93 GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
94 GNULIB_ISINF=0; AC_SUBST([GNULIB_ISINF])
95 GNULIB_ISNAN=0; AC_SUBST([GNULIB_ISNAN])
96 GNULIB_ISNANF=0; AC_SUBST([GNULIB_ISNANF])
97 GNULIB_ISNAND=0; AC_SUBST([GNULIB_ISNAND])
98 GNULIB_ISNANL=0; AC_SUBST([GNULIB_ISNANL])
99 GNULIB_LDEXPF=0; AC_SUBST([GNULIB_LDEXPF])
100 GNULIB_LDEXPL=0; AC_SUBST([GNULIB_LDEXPL])
101 GNULIB_LOGB=0; AC_SUBST([GNULIB_LOGB])
102 GNULIB_LOGF=0; AC_SUBST([GNULIB_LOGF])
103 GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL])
104 GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F])
105 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
106 GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL])
107 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
108 GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER])
109 GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF])
110 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
111 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
112 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
113 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
114 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
115 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
116 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
117 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
118 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
119 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
120 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
121 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
122 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
123 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
124 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
125 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
126 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
127 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
128 dnl Assume proper GNU behavior unless another module says otherwise.
129 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
130 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
131 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
132 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
133 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
134 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
135 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
136 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
137 HAVE_COPYSIGNF=1; AC_SUBST([HAVE_COPYSIGNF])
138 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
139 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
140 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
141 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
142 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
143 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
144 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
145 HAVE_FABSL=1; AC_SUBST([HAVE_FABSL])
146 HAVE_FMA=1; AC_SUBST([HAVE_FMA])
147 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF])
148 HAVE_FMAL=1; AC_SUBST([HAVE_FMAL])
149 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
150 HAVE_FMODL=1; AC_SUBST([HAVE_FMODL])
151 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
152 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
153 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
154 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
155 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
156 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
157 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
158 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
159 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
160 HAVE_MODFL=1; AC_SUBST([HAVE_MODFL])
161 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
162 HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER])
163 HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF])
164 HAVE_RINT=1; AC_SUBST([HAVE_RINT])
165 HAVE_RINTF=1; AC_SUBST([HAVE_RINTF])
166 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
167 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
168 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
169 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
170 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
171 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
172 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
173 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
174 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
175 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
176 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
177 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
178 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
179 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
180 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
181 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
182 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
183 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
184 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
185 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
186 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
187 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
188 HAVE_DECL_REMAINDER=1; AC_SUBST([HAVE_DECL_REMAINDER])
189 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
190 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
191 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
192 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
193 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
194 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
195 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
196 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
197 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
198 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
199 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
200 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
201 REPLACE_FABSL=0; AC_SUBST([REPLACE_FABSL])
202 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
203 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
204 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
205 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA])
206 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF])
207 REPLACE_FMAL=0; AC_SUBST([REPLACE_FMAL])
208 REPLACE_FMODL=0; AC_SUBST([REPLACE_FMODL])
209 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
210 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
211 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
212 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
213 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
214 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
215 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
216 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
217 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
218 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
219 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
220 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
221 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
222 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
223 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
224 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
225 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
228 # gl_LONG_DOUBLE_VS_DOUBLE
229 # determines whether 'long double' and 'double' have the same representation.
230 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
231 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
232 # The currently known platforms where this is the case are:
233 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
234 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
236 AC_CACHE_CHECK([whether long double and double are the same],
237 [gl_cv_long_double_equals_double],
239 [AC_LANG_PROGRAM([[#include <float.h>]],
240 [[typedef int check[sizeof (long double) == sizeof (double)
241 && LDBL_MANT_DIG == DBL_MANT_DIG
242 && LDBL_MAX_EXP == DBL_MAX_EXP
243 && LDBL_MIN_EXP == DBL_MIN_EXP
246 [gl_cv_long_double_equals_double=yes],
247 [gl_cv_long_double_equals_double=no])
249 if test $gl_cv_long_double_equals_double = yes; then
250 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
251 [Define to 1 if 'long double' and 'double' have the same representation.])
252 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
254 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
256 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])