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 log10l modff modfl powf
46 remainder remainderf remainderl
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_LOG10L=0; AC_SUBST([GNULIB_LOG10L])
106 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
107 GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL])
108 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
109 GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER])
110 GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF])
111 GNULIB_REMAINDERL=0; AC_SUBST([GNULIB_REMAINDERL])
112 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
113 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
114 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
115 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
116 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
117 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
118 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
119 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
120 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
121 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
122 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
123 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
124 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
125 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
126 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
127 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
128 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
129 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
130 dnl Assume proper GNU behavior unless another module says otherwise.
131 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
132 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
133 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
134 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
135 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
136 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
137 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
138 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
139 HAVE_COPYSIGNF=1; AC_SUBST([HAVE_COPYSIGNF])
140 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
141 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
142 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
143 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
144 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
145 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
146 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
147 HAVE_FABSL=1; AC_SUBST([HAVE_FABSL])
148 HAVE_FMA=1; AC_SUBST([HAVE_FMA])
149 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF])
150 HAVE_FMAL=1; AC_SUBST([HAVE_FMAL])
151 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
152 HAVE_FMODL=1; AC_SUBST([HAVE_FMODL])
153 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
154 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
155 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
156 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
157 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
158 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
159 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
160 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
161 HAVE_LOG10L=1; AC_SUBST([HAVE_LOG10L])
162 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
163 HAVE_MODFL=1; AC_SUBST([HAVE_MODFL])
164 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
165 HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER])
166 HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF])
167 HAVE_REMAINDERL=1; AC_SUBST([HAVE_REMAINDERL])
168 HAVE_RINT=1; AC_SUBST([HAVE_RINT])
169 HAVE_RINTF=1; AC_SUBST([HAVE_RINTF])
170 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
171 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
172 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
173 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
174 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
175 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
176 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
177 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
178 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
179 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
180 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
181 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
182 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
183 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
184 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
185 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
186 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
187 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
188 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
189 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
190 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
191 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
192 HAVE_DECL_LOG10L=1; AC_SUBST([HAVE_DECL_LOG10L])
193 HAVE_DECL_REMAINDER=1; AC_SUBST([HAVE_DECL_REMAINDER])
194 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
195 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
196 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
197 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
198 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
199 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
200 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
201 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
202 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
203 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
204 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
205 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
206 REPLACE_FABSL=0; AC_SUBST([REPLACE_FABSL])
207 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
208 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
209 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
210 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA])
211 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF])
212 REPLACE_FMAL=0; AC_SUBST([REPLACE_FMAL])
213 REPLACE_FMODL=0; AC_SUBST([REPLACE_FMODL])
214 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
215 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
216 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
217 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
218 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
219 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
220 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
221 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
222 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
223 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
224 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
225 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
226 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
227 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
228 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
229 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
230 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
233 # gl_LONG_DOUBLE_VS_DOUBLE
234 # determines whether 'long double' and 'double' have the same representation.
235 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
236 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
237 # The currently known platforms where this is the case are:
238 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
239 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
241 AC_CACHE_CHECK([whether long double and double are the same],
242 [gl_cv_long_double_equals_double],
244 [AC_LANG_PROGRAM([[#include <float.h>]],
245 [[typedef int check[sizeof (long double) == sizeof (double)
246 && LDBL_MANT_DIG == DBL_MANT_DIG
247 && LDBL_MAX_EXP == DBL_MAX_EXP
248 && LDBL_MIN_EXP == DBL_MIN_EXP
251 [gl_cv_long_double_equals_double=yes],
252 [gl_cv_long_double_equals_double=no])
254 if test $gl_cv_long_double_equals_double = yes; then
255 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
256 [Define to 1 if 'long double' and 'double' have the same representation.])
257 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
259 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
261 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])