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