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