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