1 # math_h.m4 serial 114 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. 6 7 AC_DEFUN([gl_MATH_H], 8 [ 9 AC_REQUIRE([gl_MATH_H_DEFAULTS]) 10 gl_CHECK_NEXT_HEADERS([math.h]) 11 12 AC_CACHE_CHECK([whether NAN macro works], [gl_cv_header_math_nan_works], 13 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <math.h>]], 14 [[/* Solaris 10 has a broken definition of NAN. Other platforms 15 fail to provide NAN, or provide it only in C99 mode; this 16 test only needs to fail when NAN is provided but wrong. */ 17 float f = 1.0f; 18 #ifdef NAN 19 f = NAN; 20 #endif 21 return f == 0;]])], 22 [gl_cv_header_math_nan_works=yes], 23 [gl_cv_header_math_nan_works=no])]) 24 if test $gl_cv_header_math_nan_works = no; then 25 REPLACE_NAN=1 26 fi 27 AC_CACHE_CHECK([whether HUGE_VAL works], [gl_cv_header_math_huge_val_works], 28 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <math.h>]], 29 [[/* Solaris 10 has a broken definition of HUGE_VAL. */ 30 double d = HUGE_VAL; 31 return d == 0;]])], 32 [gl_cv_header_math_huge_val_works=yes], 33 [gl_cv_header_math_huge_val_works=no])]) 34 if test $gl_cv_header_math_huge_val_works = no; then 35 REPLACE_HUGE_VAL=1 36 fi 37 38 dnl Check for declarations of anything we want to poison if the 39 dnl corresponding gnulib module is not in use. 40 gl_WARN_ON_USE_PREPARE([[#include <math.h>]], 41 [acosf acosl asinf asinl atanf atanl 42 cbrt cbrtf cbrtl ceilf ceill copysign copysignf copysignl cosf cosl coshf 43 expf expl exp2 exp2f exp2l expm1 expm1f expm1l 44 fabsf fabsl floorf floorl fma fmaf fmal 45 fmod fmodf fmodl frexpf frexpl hypotf hypotl 46 ilogb ilogbf ilogbl 47 ldexpf ldexpl 48 log logf logl log10 log10f log10l log1p log1pf log1pl log2 log2f log2l 49 logb logbf logbl 50 modf modff modfl powf 51 remainder remainderf remainderl 52 rint rintf rintl round roundf roundl sinf sinl sinhf sqrtf sqrtl 53 tanf tanl tanhf trunc truncf truncl]) 54 ]) 55 56 AC_DEFUN([gl_MATH_MODULE_INDICATOR], 57 [ 58 dnl Use AC_REQUIRE here, so that the default settings are expanded once only. 59 AC_REQUIRE([gl_MATH_H_DEFAULTS]) 60 gl_MODULE_INDICATOR_SET_VARIABLE([$1]) 61 dnl Define it also as a C macro, for the benefit of the unit tests. 62 gl_MODULE_INDICATOR_FOR_TESTS([$1]) 63 ]) 64 65 AC_DEFUN([gl_MATH_H_DEFAULTS], 66 [ 67 GNULIB_ACOSF=0; AC_SUBST([GNULIB_ACOSF]) 68 GNULIB_ACOSL=0; AC_SUBST([GNULIB_ACOSL]) 69 GNULIB_ASINF=0; AC_SUBST([GNULIB_ASINF]) 70 GNULIB_ASINL=0; AC_SUBST([GNULIB_ASINL]) 71 GNULIB_ATANF=0; AC_SUBST([GNULIB_ATANF]) 72 GNULIB_ATANL=0; AC_SUBST([GNULIB_ATANL]) 73 GNULIB_ATAN2F=0; AC_SUBST([GNULIB_ATAN2F]) 74 GNULIB_CBRT=0; AC_SUBST([GNULIB_CBRT]) 75 GNULIB_CBRTF=0; AC_SUBST([GNULIB_CBRTF]) 76 GNULIB_CBRTL=0; AC_SUBST([GNULIB_CBRTL]) 77 GNULIB_CEIL=0; AC_SUBST([GNULIB_CEIL]) 78 GNULIB_CEILF=0; AC_SUBST([GNULIB_CEILF]) 79 GNULIB_CEILL=0; AC_SUBST([GNULIB_CEILL]) 80 GNULIB_COPYSIGN=0; AC_SUBST([GNULIB_COPYSIGN]) 81 GNULIB_COPYSIGNF=0; AC_SUBST([GNULIB_COPYSIGNF]) 82 GNULIB_COPYSIGNL=0; AC_SUBST([GNULIB_COPYSIGNL]) 83 GNULIB_COSF=0; AC_SUBST([GNULIB_COSF]) 84 GNULIB_COSL=0; AC_SUBST([GNULIB_COSL]) 85 GNULIB_COSHF=0; AC_SUBST([GNULIB_COSHF]) 86 GNULIB_EXPF=0; AC_SUBST([GNULIB_EXPF]) 87 GNULIB_EXPL=0; AC_SUBST([GNULIB_EXPL]) 88 GNULIB_EXP2=0; AC_SUBST([GNULIB_EXP2]) 89 GNULIB_EXP2F=0; AC_SUBST([GNULIB_EXP2F]) 90 GNULIB_EXP2L=0; AC_SUBST([GNULIB_EXP2L]) 91 GNULIB_EXPM1=0; AC_SUBST([GNULIB_EXPM1]) 92 GNULIB_EXPM1F=0; AC_SUBST([GNULIB_EXPM1F]) 93 GNULIB_EXPM1L=0; AC_SUBST([GNULIB_EXPM1L]) 94 GNULIB_FABSF=0; AC_SUBST([GNULIB_FABSF]) 95 GNULIB_FABSL=0; AC_SUBST([GNULIB_FABSL]) 96 GNULIB_FLOOR=0; AC_SUBST([GNULIB_FLOOR]) 97 GNULIB_FLOORF=0; AC_SUBST([GNULIB_FLOORF]) 98 GNULIB_FLOORL=0; AC_SUBST([GNULIB_FLOORL]) 99 GNULIB_FMA=0; AC_SUBST([GNULIB_FMA]) 100 GNULIB_FMAF=0; AC_SUBST([GNULIB_FMAF]) 101 GNULIB_FMAL=0; AC_SUBST([GNULIB_FMAL]) 102 GNULIB_FMOD=0; AC_SUBST([GNULIB_FMOD]) 103 GNULIB_FMODF=0; AC_SUBST([GNULIB_FMODF]) 104 GNULIB_FMODL=0; AC_SUBST([GNULIB_FMODL]) 105 GNULIB_FREXPF=0; AC_SUBST([GNULIB_FREXPF]) 106 GNULIB_FREXP=0; AC_SUBST([GNULIB_FREXP]) 107 GNULIB_FREXPL=0; AC_SUBST([GNULIB_FREXPL]) 108 GNULIB_HYPOT=0; AC_SUBST([GNULIB_HYPOT]) 109 GNULIB_HYPOTF=0; AC_SUBST([GNULIB_HYPOTF]) 110 GNULIB_HYPOTL=0; AC_SUBST([GNULIB_HYPOTL]) 111 GNULIB_ILOGB=0; AC_SUBST([GNULIB_ILOGB]) 112 GNULIB_ILOGBF=0; AC_SUBST([GNULIB_ILOGBF]) 113 GNULIB_ILOGBL=0; AC_SUBST([GNULIB_ILOGBL]) 114 GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE]) 115 GNULIB_ISINF=0; AC_SUBST([GNULIB_ISINF]) 116 GNULIB_ISNAN=0; AC_SUBST([GNULIB_ISNAN]) 117 GNULIB_ISNANF=0; AC_SUBST([GNULIB_ISNANF]) 118 GNULIB_ISNAND=0; AC_SUBST([GNULIB_ISNAND]) 119 GNULIB_ISNANL=0; AC_SUBST([GNULIB_ISNANL]) 120 GNULIB_LDEXPF=0; AC_SUBST([GNULIB_LDEXPF]) 121 GNULIB_LDEXPL=0; AC_SUBST([GNULIB_LDEXPL]) 122 GNULIB_LOG=0; AC_SUBST([GNULIB_LOG]) 123 GNULIB_LOGF=0; AC_SUBST([GNULIB_LOGF]) 124 GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL]) 125 GNULIB_LOG10=0; AC_SUBST([GNULIB_LOG10]) 126 GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F]) 127 GNULIB_LOG10L=0; AC_SUBST([GNULIB_LOG10L]) 128 GNULIB_LOG1P=0; AC_SUBST([GNULIB_LOG1P]) 129 GNULIB_LOG1PF=0; AC_SUBST([GNULIB_LOG1PF]) 130 GNULIB_LOG1PL=0; AC_SUBST([GNULIB_LOG1PL]) 131 GNULIB_LOG2=0; AC_SUBST([GNULIB_LOG2]) 132 GNULIB_LOG2F=0; AC_SUBST([GNULIB_LOG2F]) 133 GNULIB_LOG2L=0; AC_SUBST([GNULIB_LOG2L]) 134 GNULIB_LOGB=0; AC_SUBST([GNULIB_LOGB]) 135 GNULIB_LOGBF=0; AC_SUBST([GNULIB_LOGBF]) 136 GNULIB_LOGBL=0; AC_SUBST([GNULIB_LOGBL]) 137 GNULIB_MODF=0; AC_SUBST([GNULIB_MODF]) 138 GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF]) 139 GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL]) 140 GNULIB_POWF=0; AC_SUBST([GNULIB_POWF]) 141 GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER]) 142 GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF]) 143 GNULIB_REMAINDERL=0; AC_SUBST([GNULIB_REMAINDERL]) 144 GNULIB_RINT=0; AC_SUBST([GNULIB_RINT]) 145 GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF]) 146 GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL]) 147 GNULIB_ROUND=0; AC_SUBST([GNULIB_ROUND]) 148 GNULIB_ROUNDF=0; AC_SUBST([GNULIB_ROUNDF]) 149 GNULIB_ROUNDL=0; AC_SUBST([GNULIB_ROUNDL]) 150 GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT]) 151 GNULIB_SINF=0; AC_SUBST([GNULIB_SINF]) 152 GNULIB_SINL=0; AC_SUBST([GNULIB_SINL]) 153 GNULIB_SINHF=0; AC_SUBST([GNULIB_SINHF]) 154 GNULIB_SQRTF=0; AC_SUBST([GNULIB_SQRTF]) 155 GNULIB_SQRTL=0; AC_SUBST([GNULIB_SQRTL]) 156 GNULIB_TANF=0; AC_SUBST([GNULIB_TANF]) 157 GNULIB_TANL=0; AC_SUBST([GNULIB_TANL]) 158 GNULIB_TANHF=0; AC_SUBST([GNULIB_TANHF]) 159 GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC]) 160 GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF]) 161 GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL]) 162 dnl Assume proper GNU behavior unless another module says otherwise. 163 HAVE_ACOSF=1; AC_SUBST([HAVE_ACOSF]) 164 HAVE_ACOSL=1; AC_SUBST([HAVE_ACOSL]) 165 HAVE_ASINF=1; AC_SUBST([HAVE_ASINF]) 166 HAVE_ASINL=1; AC_SUBST([HAVE_ASINL]) 167 HAVE_ATANF=1; AC_SUBST([HAVE_ATANF]) 168 HAVE_ATANL=1; AC_SUBST([HAVE_ATANL]) 169 HAVE_ATAN2F=1; AC_SUBST([HAVE_ATAN2F]) 170 HAVE_CBRT=1; AC_SUBST([HAVE_CBRT]) 171 HAVE_CBRTF=1; AC_SUBST([HAVE_CBRTF]) 172 HAVE_CBRTL=1; AC_SUBST([HAVE_CBRTL]) 173 HAVE_COPYSIGN=1; AC_SUBST([HAVE_COPYSIGN]) 174 HAVE_COPYSIGNL=1; AC_SUBST([HAVE_COPYSIGNL]) 175 HAVE_COSF=1; AC_SUBST([HAVE_COSF]) 176 HAVE_COSL=1; AC_SUBST([HAVE_COSL]) 177 HAVE_COSHF=1; AC_SUBST([HAVE_COSHF]) 178 HAVE_EXPF=1; AC_SUBST([HAVE_EXPF]) 179 HAVE_EXPL=1; AC_SUBST([HAVE_EXPL]) 180 HAVE_EXPM1=1; AC_SUBST([HAVE_EXPM1]) 181 HAVE_EXPM1F=1; AC_SUBST([HAVE_EXPM1F]) 182 HAVE_FABSF=1; AC_SUBST([HAVE_FABSF]) 183 HAVE_FABSL=1; AC_SUBST([HAVE_FABSL]) 184 HAVE_FMA=1; AC_SUBST([HAVE_FMA]) 185 HAVE_FMAF=1; AC_SUBST([HAVE_FMAF]) 186 HAVE_FMAL=1; AC_SUBST([HAVE_FMAL]) 187 HAVE_FMODF=1; AC_SUBST([HAVE_FMODF]) 188 HAVE_FMODL=1; AC_SUBST([HAVE_FMODL]) 189 HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF]) 190 HAVE_HYPOTF=1; AC_SUBST([HAVE_HYPOTF]) 191 HAVE_HYPOTL=1; AC_SUBST([HAVE_HYPOTL]) 192 HAVE_ILOGB=1; AC_SUBST([HAVE_ILOGB]) 193 HAVE_ILOGBF=1; AC_SUBST([HAVE_ILOGBF]) 194 HAVE_ILOGBL=1; AC_SUBST([HAVE_ILOGBL]) 195 HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF]) 196 HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND]) 197 HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL]) 198 HAVE_LDEXPF=1; AC_SUBST([HAVE_LDEXPF]) 199 HAVE_LOGF=1; AC_SUBST([HAVE_LOGF]) 200 HAVE_LOGL=1; AC_SUBST([HAVE_LOGL]) 201 HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F]) 202 HAVE_LOG10L=1; AC_SUBST([HAVE_LOG10L]) 203 HAVE_LOG1P=1; AC_SUBST([HAVE_LOG1P]) 204 HAVE_LOG1PF=1; AC_SUBST([HAVE_LOG1PF]) 205 HAVE_LOG1PL=1; AC_SUBST([HAVE_LOG1PL]) 206 HAVE_LOGBF=1; AC_SUBST([HAVE_LOGBF]) 207 HAVE_LOGBL=1; AC_SUBST([HAVE_LOGBL]) 208 HAVE_MODFF=1; AC_SUBST([HAVE_MODFF]) 209 HAVE_MODFL=1; AC_SUBST([HAVE_MODFL]) 210 HAVE_POWF=1; AC_SUBST([HAVE_POWF]) 211 HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER]) 212 HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF]) 213 HAVE_RINT=1; AC_SUBST([HAVE_RINT]) 214 HAVE_RINTL=1; AC_SUBST([HAVE_RINTL]) 215 HAVE_SINF=1; AC_SUBST([HAVE_SINF]) 216 HAVE_SINL=1; AC_SUBST([HAVE_SINL]) 217 HAVE_SINHF=1; AC_SUBST([HAVE_SINHF]) 218 HAVE_SQRTF=1; AC_SUBST([HAVE_SQRTF]) 219 HAVE_SQRTL=1; AC_SUBST([HAVE_SQRTL]) 220 HAVE_TANF=1; AC_SUBST([HAVE_TANF]) 221 HAVE_TANL=1; AC_SUBST([HAVE_TANL]) 222 HAVE_TANHF=1; AC_SUBST([HAVE_TANHF]) 223 HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL]) 224 HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL]) 225 HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL]) 226 HAVE_DECL_CBRTF=1; AC_SUBST([HAVE_DECL_CBRTF]) 227 HAVE_DECL_CBRTL=1; AC_SUBST([HAVE_DECL_CBRTL]) 228 HAVE_DECL_CEILF=1; AC_SUBST([HAVE_DECL_CEILF]) 229 HAVE_DECL_CEILL=1; AC_SUBST([HAVE_DECL_CEILL]) 230 HAVE_DECL_COPYSIGNF=1; AC_SUBST([HAVE_DECL_COPYSIGNF]) 231 HAVE_DECL_COSL=1; AC_SUBST([HAVE_DECL_COSL]) 232 HAVE_DECL_EXPL=1; AC_SUBST([HAVE_DECL_EXPL]) 233 HAVE_DECL_EXP2=1; AC_SUBST([HAVE_DECL_EXP2]) 234 HAVE_DECL_EXP2F=1; AC_SUBST([HAVE_DECL_EXP2F]) 235 HAVE_DECL_EXP2L=1; AC_SUBST([HAVE_DECL_EXP2L]) 236 HAVE_DECL_EXPM1L=1; AC_SUBST([HAVE_DECL_EXPM1L]) 237 HAVE_DECL_FLOORF=1; AC_SUBST([HAVE_DECL_FLOORF]) 238 HAVE_DECL_FLOORL=1; AC_SUBST([HAVE_DECL_FLOORL]) 239 HAVE_DECL_FREXPL=1; AC_SUBST([HAVE_DECL_FREXPL]) 240 HAVE_DECL_LDEXPL=1; AC_SUBST([HAVE_DECL_LDEXPL]) 241 HAVE_DECL_LOGL=1; AC_SUBST([HAVE_DECL_LOGL]) 242 HAVE_DECL_LOG10L=1; AC_SUBST([HAVE_DECL_LOG10L]) 243 HAVE_DECL_LOG2=1; AC_SUBST([HAVE_DECL_LOG2]) 244 HAVE_DECL_LOG2F=1; AC_SUBST([HAVE_DECL_LOG2F]) 245 HAVE_DECL_LOG2L=1; AC_SUBST([HAVE_DECL_LOG2L]) 246 HAVE_DECL_LOGB=1; AC_SUBST([HAVE_DECL_LOGB]) 247 HAVE_DECL_REMAINDER=1; AC_SUBST([HAVE_DECL_REMAINDER]) 248 HAVE_DECL_REMAINDERL=1; AC_SUBST([HAVE_DECL_REMAINDERL]) 249 HAVE_DECL_RINTF=1; AC_SUBST([HAVE_DECL_RINTF]) 250 HAVE_DECL_ROUND=1; AC_SUBST([HAVE_DECL_ROUND]) 251 HAVE_DECL_ROUNDF=1; AC_SUBST([HAVE_DECL_ROUNDF]) 252 HAVE_DECL_ROUNDL=1; AC_SUBST([HAVE_DECL_ROUNDL]) 253 HAVE_DECL_SINL=1; AC_SUBST([HAVE_DECL_SINL]) 254 HAVE_DECL_SQRTL=1; AC_SUBST([HAVE_DECL_SQRTL]) 255 HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL]) 256 HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC]) 257 HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF]) 258 HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL]) 259 REPLACE_CBRTF=0; AC_SUBST([REPLACE_CBRTF]) 260 REPLACE_CBRTL=0; AC_SUBST([REPLACE_CBRTL]) 261 REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL]) 262 REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF]) 263 REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL]) 264 REPLACE_EXPM1=0; AC_SUBST([REPLACE_EXPM1]) 265 REPLACE_EXPM1F=0; AC_SUBST([REPLACE_EXPM1F]) 266 REPLACE_EXP2=0; AC_SUBST([REPLACE_EXP2]) 267 REPLACE_EXP2L=0; AC_SUBST([REPLACE_EXP2L]) 268 REPLACE_FABSL=0; AC_SUBST([REPLACE_FABSL]) 269 REPLACE_FLOOR=0; AC_SUBST([REPLACE_FLOOR]) 270 REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF]) 271 REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL]) 272 REPLACE_FMA=0; AC_SUBST([REPLACE_FMA]) 273 REPLACE_FMAF=0; AC_SUBST([REPLACE_FMAF]) 274 REPLACE_FMAL=0; AC_SUBST([REPLACE_FMAL]) 275 REPLACE_FMOD=0; AC_SUBST([REPLACE_FMOD]) 276 REPLACE_FMODF=0; AC_SUBST([REPLACE_FMODF]) 277 REPLACE_FMODL=0; AC_SUBST([REPLACE_FMODL]) 278 REPLACE_FREXPF=0; AC_SUBST([REPLACE_FREXPF]) 279 REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP]) 280 REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL]) 281 REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL]) 282 REPLACE_HYPOT=0; AC_SUBST([REPLACE_HYPOT]) 283 REPLACE_HYPOTF=0; AC_SUBST([REPLACE_HYPOTF]) 284 REPLACE_HYPOTL=0; AC_SUBST([REPLACE_HYPOTL]) 285 REPLACE_ILOGB=0; AC_SUBST([REPLACE_ILOGB]) 286 REPLACE_ILOGBF=0; AC_SUBST([REPLACE_ILOGBF]) 287 REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE]) 288 REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF]) 289 REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN]) 290 REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL]) 291 REPLACE_LOG=0; AC_SUBST([REPLACE_LOG]) 292 REPLACE_LOGF=0; AC_SUBST([REPLACE_LOGF]) 293 REPLACE_LOGL=0; AC_SUBST([REPLACE_LOGL]) 294 REPLACE_LOG10=0; AC_SUBST([REPLACE_LOG10]) 295 REPLACE_LOG10F=0; AC_SUBST([REPLACE_LOG10F]) 296 REPLACE_LOG10L=0; AC_SUBST([REPLACE_LOG10L]) 297 REPLACE_LOG1P=0; AC_SUBST([REPLACE_LOG1P]) 298 REPLACE_LOG1PF=0; AC_SUBST([REPLACE_LOG1PF]) 299 REPLACE_LOG1PL=0; AC_SUBST([REPLACE_LOG1PL]) 300 REPLACE_LOG2=0; AC_SUBST([REPLACE_LOG2]) 301 REPLACE_LOG2F=0; AC_SUBST([REPLACE_LOG2F]) 302 REPLACE_LOG2L=0; AC_SUBST([REPLACE_LOG2L]) 303 REPLACE_LOGB=0; AC_SUBST([REPLACE_LOGB]) 304 REPLACE_LOGBF=0; AC_SUBST([REPLACE_LOGBF]) 305 REPLACE_LOGBL=0; AC_SUBST([REPLACE_LOGBL]) 306 REPLACE_MODF=0; AC_SUBST([REPLACE_MODF]) 307 REPLACE_MODFF=0; AC_SUBST([REPLACE_MODFF]) 308 REPLACE_MODFL=0; AC_SUBST([REPLACE_MODFL]) 309 REPLACE_NAN=0; AC_SUBST([REPLACE_NAN]) 310 REPLACE_REMAINDER=0; AC_SUBST([REPLACE_REMAINDER]) 311 REPLACE_REMAINDERF=0; AC_SUBST([REPLACE_REMAINDERF]) 312 REPLACE_REMAINDERL=0; AC_SUBST([REPLACE_REMAINDERL]) 313 REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND]) 314 REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF]) 315 REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL]) 316 REPLACE_SIGNBIT=0; AC_SUBST([REPLACE_SIGNBIT]) 317 REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC]) 318 REPLACE_SQRTL=0; AC_SUBST([REPLACE_SQRTL]) 319 REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC]) 320 REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF]) 321 REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL]) 322 ]) 323 324 # gl_LONG_DOUBLE_VS_DOUBLE 325 # determines whether 'long double' and 'double' have the same representation. 326 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines 327 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly. 328 # The currently known platforms where this is the case are: 329 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9. 330 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE], 331 [ 332 AC_CACHE_CHECK([whether long double and double are the same], 333 [gl_cv_long_double_equals_double], 334 [AC_COMPILE_IFELSE( 335 [AC_LANG_PROGRAM([[#include <float.h>]], 336 [[typedef int check[sizeof (long double) == sizeof (double) 337 && LDBL_MANT_DIG == DBL_MANT_DIG 338 && LDBL_MAX_EXP == DBL_MAX_EXP 339 && LDBL_MIN_EXP == DBL_MIN_EXP 340 ? 1 : -1]; 341 ]])], 342 [gl_cv_long_double_equals_double=yes], 343 [gl_cv_long_double_equals_double=no]) 344 ]) 345 if test $gl_cv_long_double_equals_double = yes; then 346 AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1], 347 [Define to 1 if 'long double' and 'double' have the same representation.]) 348 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1 349 else 350 HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0 351 fi 352 AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE]) 353 ]) 354
