2 dnl Copyright (C) 2007-2011 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 floorf floorl fma fmaf fmodf frexpf frexpl
45 ldexpf ldexpl logb logf logl log10f modff 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_FLOOR=0; AC_SUBST([GNULIB_FLOOR])
81 GNULIB_FLOORF=0; AC_SUBST([GNULIB_FLOORF])
82 GNULIB_FLOORL=0; AC_SUBST([GNULIB_FLOORL])
83 GNULIB_FMA=0; AC_SUBST([GNULIB_FMA])
84 GNULIB_FMAF=0; AC_SUBST([GNULIB_FMAF])
85 GNULIB_FMODF=0; AC_SUBST([GNULIB_FMODF])
86 GNULIB_FREXPF=0; AC_SUBST([GNULIB_FREXPF])
87 GNULIB_FREXP=0; AC_SUBST([GNULIB_FREXP])
88 GNULIB_FREXPL=0; AC_SUBST([GNULIB_FREXPL])
89 GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
90 GNULIB_ISINF=0; AC_SUBST([GNULIB_ISINF])
91 GNULIB_ISNAN=0; AC_SUBST([GNULIB_ISNAN])
92 GNULIB_ISNANF=0; AC_SUBST([GNULIB_ISNANF])
93 GNULIB_ISNAND=0; AC_SUBST([GNULIB_ISNAND])
94 GNULIB_ISNANL=0; AC_SUBST([GNULIB_ISNANL])
95 GNULIB_LDEXPF=0; AC_SUBST([GNULIB_LDEXPF])
96 GNULIB_LDEXPL=0; AC_SUBST([GNULIB_LDEXPL])
97 GNULIB_LOGB=0; AC_SUBST([GNULIB_LOGB])
98 GNULIB_LOGF=0; AC_SUBST([GNULIB_LOGF])
99 GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL])
100 GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F])
101 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
102 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
103 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
104 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
105 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
106 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND])
107 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF])
108 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL])
109 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT])
110 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF])
111 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL])
112 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF])
113 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF])
114 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL])
115 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF])
116 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL])
117 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF])
118 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC])
119 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF])
120 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL])
121 dnl Assume proper GNU behavior unless another module says otherwise.
122 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF])
123 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL])
124 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF])
125 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL])
126 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF])
127 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL])
128 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F])
129 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN])
130 HAVE_COPYSIGNF=1; AC_SUBST([HAVE_COPYSIGNF])
131 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL])
132 HAVE_COSF=1; AC_SUBST([HAVE_COSF])
133 HAVE_COSL=1; AC_SUBST([HAVE_COSL])
134 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF])
135 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF])
136 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL])
137 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF])
138 HAVE_FMA=1; AC_SUBST([HAVE_FMA])
139 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF])
140 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF])
141 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
142 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
143 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
144 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
145 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF])
146 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF])
147 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
148 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
149 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
150 HAVE_POWF=1; AC_SUBST([HAVE_POWF])
151 HAVE_RINT=1; AC_SUBST([HAVE_RINT])
152 HAVE_RINTF=1; AC_SUBST([HAVE_RINTF])
153 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
154 HAVE_SINF=1; AC_SUBST([HAVE_SINF])
155 HAVE_SINL=1; AC_SUBST([HAVE_SINL])
156 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF])
157 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF])
158 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL])
159 HAVE_TANF=1; AC_SUBST([HAVE_TANF])
160 HAVE_TANL=1; AC_SUBST([HAVE_TANL])
161 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF])
162 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
163 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
164 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
165 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF])
166 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL])
167 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL])
168 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL])
169 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF])
170 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL])
171 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL])
172 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL])
173 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB])
174 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL])
175 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND])
176 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF])
177 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL])
178 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL])
179 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL])
180 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL])
181 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
182 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
183 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
184 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
185 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
186 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
187 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR])
188 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF])
189 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL])
190 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA])
191 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF])
192 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF])
193 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP])
194 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
195 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
196 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
197 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
198 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
199 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL])
200 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
201 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
202 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
203 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
204 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT])
205 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
206 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
207 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
208 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
211 # gl_LONG_DOUBLE_VS_DOUBLE
212 # determines whether 'long double' and 'double' have the same representation.
213 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
214 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
215 # The currently known platforms where this is the case are:
216 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
217 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
219 AC_CACHE_CHECK([whether long double and double are the same],
220 [gl_cv_long_double_equals_double],
222 [AC_LANG_PROGRAM([[#include <float.h>]],
223 [[typedef int check[sizeof (long double) == sizeof (double)
224 && LDBL_MANT_DIG == DBL_MANT_DIG
225 && LDBL_MAX_EXP == DBL_MAX_EXP
226 && LDBL_MIN_EXP == DBL_MIN_EXP
229 [gl_cv_long_double_equals_double=yes],
230 [gl_cv_long_double_equals_double=no])
232 if test $gl_cv_long_double_equals_double = yes; then
233 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
234 [Define to 1 if 'long double' and 'double' have the same representation.])
235 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
237 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
239 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])