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