gnulib/import/m4/math_h.m4

   1 # math_h.m4 serial 119
   2 dnl Copyright (C) 2007-2019 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_ACOSF=0;             AC_SUBST([REPLACE_ACOSF])
 260   REPLACE_ASINF=0;             AC_SUBST([REPLACE_ASINF])
 261   REPLACE_ATANF=0;             AC_SUBST([REPLACE_ATANF])
 262   REPLACE_ATAN2F=0;            AC_SUBST([REPLACE_ATAN2F])
 263   REPLACE_CBRTF=0;             AC_SUBST([REPLACE_CBRTF])
 264   REPLACE_CBRTL=0;             AC_SUBST([REPLACE_CBRTL])
 265   REPLACE_CEIL=0;              AC_SUBST([REPLACE_CEIL])
 266   REPLACE_CEILF=0;             AC_SUBST([REPLACE_CEILF])
 267   REPLACE_CEILL=0;             AC_SUBST([REPLACE_CEILL])
 268   REPLACE_COSF=0;              AC_SUBST([REPLACE_COSF])
 269   REPLACE_COSHF=0;             AC_SUBST([REPLACE_COSHF])
 270   REPLACE_EXPF=0;              AC_SUBST([REPLACE_EXPF])
 271   REPLACE_EXPL=0;              AC_SUBST([REPLACE_EXPL])
 272   REPLACE_EXPM1=0;             AC_SUBST([REPLACE_EXPM1])
 273   REPLACE_EXPM1F=0;            AC_SUBST([REPLACE_EXPM1F])
 274   REPLACE_EXPM1L=0;            AC_SUBST([REPLACE_EXPM1L])
 275   REPLACE_EXP2=0;              AC_SUBST([REPLACE_EXP2])
 276   REPLACE_EXP2L=0;             AC_SUBST([REPLACE_EXP2L])
 277   REPLACE_FABSL=0;             AC_SUBST([REPLACE_FABSL])
 278   REPLACE_FLOOR=0;             AC_SUBST([REPLACE_FLOOR])
 279   REPLACE_FLOORF=0;            AC_SUBST([REPLACE_FLOORF])
 280   REPLACE_FLOORL=0;            AC_SUBST([REPLACE_FLOORL])
 281   REPLACE_FMA=0;               AC_SUBST([REPLACE_FMA])
 282   REPLACE_FMAF=0;              AC_SUBST([REPLACE_FMAF])
 283   REPLACE_FMAL=0;              AC_SUBST([REPLACE_FMAL])
 284   REPLACE_FMOD=0;              AC_SUBST([REPLACE_FMOD])
 285   REPLACE_FMODF=0;             AC_SUBST([REPLACE_FMODF])
 286   REPLACE_FMODL=0;             AC_SUBST([REPLACE_FMODL])
 287   REPLACE_FREXPF=0;            AC_SUBST([REPLACE_FREXPF])
 288   REPLACE_FREXP=0;             AC_SUBST([REPLACE_FREXP])
 289   REPLACE_FREXPL=0;            AC_SUBST([REPLACE_FREXPL])
 290   REPLACE_HUGE_VAL=0;          AC_SUBST([REPLACE_HUGE_VAL])
 291   REPLACE_HYPOT=0;             AC_SUBST([REPLACE_HYPOT])
 292   REPLACE_HYPOTF=0;            AC_SUBST([REPLACE_HYPOTF])
 293   REPLACE_HYPOTL=0;            AC_SUBST([REPLACE_HYPOTL])
 294   REPLACE_ILOGB=0;             AC_SUBST([REPLACE_ILOGB])
 295   REPLACE_ILOGBF=0;            AC_SUBST([REPLACE_ILOGBF])
 296   REPLACE_ILOGBL=0;            AC_SUBST([REPLACE_ILOGBL])
 297   REPLACE_ISFINITE=0;          AC_SUBST([REPLACE_ISFINITE])
 298   REPLACE_ISINF=0;             AC_SUBST([REPLACE_ISINF])
 299   REPLACE_ISNAN=0;             AC_SUBST([REPLACE_ISNAN])
 300   REPLACE_LDEXPL=0;            AC_SUBST([REPLACE_LDEXPL])
 301   REPLACE_LOG=0;               AC_SUBST([REPLACE_LOG])
 302   REPLACE_LOGF=0;              AC_SUBST([REPLACE_LOGF])
 303   REPLACE_LOGL=0;              AC_SUBST([REPLACE_LOGL])
 304   REPLACE_LOG10=0;             AC_SUBST([REPLACE_LOG10])
 305   REPLACE_LOG10F=0;            AC_SUBST([REPLACE_LOG10F])
 306   REPLACE_LOG10L=0;            AC_SUBST([REPLACE_LOG10L])
 307   REPLACE_LOG1P=0;             AC_SUBST([REPLACE_LOG1P])
 308   REPLACE_LOG1PF=0;            AC_SUBST([REPLACE_LOG1PF])
 309   REPLACE_LOG1PL=0;            AC_SUBST([REPLACE_LOG1PL])
 310   REPLACE_LOG2=0;              AC_SUBST([REPLACE_LOG2])
 311   REPLACE_LOG2F=0;             AC_SUBST([REPLACE_LOG2F])
 312   REPLACE_LOG2L=0;             AC_SUBST([REPLACE_LOG2L])
 313   REPLACE_LOGB=0;              AC_SUBST([REPLACE_LOGB])
 314   REPLACE_LOGBF=0;             AC_SUBST([REPLACE_LOGBF])
 315   REPLACE_LOGBL=0;             AC_SUBST([REPLACE_LOGBL])
 316   REPLACE_MODF=0;              AC_SUBST([REPLACE_MODF])
 317   REPLACE_MODFF=0;             AC_SUBST([REPLACE_MODFF])
 318   REPLACE_MODFL=0;             AC_SUBST([REPLACE_MODFL])
 319   REPLACE_NAN=0;               AC_SUBST([REPLACE_NAN])
 320   REPLACE_REMAINDER=0;         AC_SUBST([REPLACE_REMAINDER])
 321   REPLACE_REMAINDERF=0;        AC_SUBST([REPLACE_REMAINDERF])
 322   REPLACE_REMAINDERL=0;        AC_SUBST([REPLACE_REMAINDERL])
 323   REPLACE_RINTL=0;             AC_SUBST([REPLACE_RINTL])
 324   REPLACE_ROUND=0;             AC_SUBST([REPLACE_ROUND])
 325   REPLACE_ROUNDF=0;            AC_SUBST([REPLACE_ROUNDF])
 326   REPLACE_ROUNDL=0;            AC_SUBST([REPLACE_ROUNDL])
 327   REPLACE_SIGNBIT=0;           AC_SUBST([REPLACE_SIGNBIT])
 328   REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
 329   REPLACE_SINF=0;              AC_SUBST([REPLACE_SINF])
 330   REPLACE_SINHF=0;             AC_SUBST([REPLACE_SINHF])
 331   REPLACE_SQRTF=0;             AC_SUBST([REPLACE_SQRTF])
 332   REPLACE_SQRTL=0;             AC_SUBST([REPLACE_SQRTL])
 333   REPLACE_TANF=0;              AC_SUBST([REPLACE_TANF])
 334   REPLACE_TANHF=0;             AC_SUBST([REPLACE_TANHF])
 335   REPLACE_TRUNC=0;             AC_SUBST([REPLACE_TRUNC])
 336   REPLACE_TRUNCF=0;            AC_SUBST([REPLACE_TRUNCF])
 337   REPLACE_TRUNCL=0;            AC_SUBST([REPLACE_TRUNCL])
 338 ])
 339
 340 # gl_LONG_DOUBLE_VS_DOUBLE
 341 # determines whether 'long double' and 'double' have the same representation.
 342 # Sets variable HAVE_SAME_LONG_DOUBLE_AS_DOUBLE to 0 or 1, and defines
 343 # HAVE_SAME_LONG_DOUBLE_AS_DOUBLE accordingly.
 344 # The currently known platforms where this is the case are:
 345 # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
 346 AC_DEFUN([gl_LONG_DOUBLE_VS_DOUBLE],
 347 [
 348   AC_CACHE_CHECK([whether long double and double are the same],
 349     [gl_cv_long_double_equals_double],
 350     [AC_COMPILE_IFELSE(
 351        [AC_LANG_PROGRAM([[#include <float.h>]],
 352           [[typedef int check[sizeof (long double) == sizeof (double)
 353                               && LDBL_MANT_DIG == DBL_MANT_DIG
 354                               && LDBL_MAX_EXP == DBL_MAX_EXP
 355                               && LDBL_MIN_EXP == DBL_MIN_EXP
 356                               ? 1 : -1];
 357           ]])],
 358        [gl_cv_long_double_equals_double=yes],
 359        [gl_cv_long_double_equals_double=no])
 360     ])
 361   if test $gl_cv_long_double_equals_double = yes; then
 362     AC_DEFINE([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE], [1],
 363       [Define to 1 if 'long double' and 'double' have the same representation.])
 364     HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=1
 365   else
 366     HAVE_SAME_LONG_DOUBLE_AS_DOUBLE=0
 367   fi
 368   AC_SUBST([HAVE_SAME_LONG_DOUBLE_AS_DOUBLE])
 369 ])