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