kc3-lang/gnulib/m4/minus-zero.m4

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• m4/minus-zero.m4

• # minus-zero.m4 serial 2
  dnl Copyright (C) 2010-2023 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
  dnl with or without modifications, as long as this notice is preserved.
  
  # Macros for floating-point negative zero.
  # Keep in sync with tests/minus-zero.h!
  
  # Expands to code that defines a variable or macro minus_zerof.
  AC_DEFUN([gl_FLOAT_MINUS_ZERO_CODE],
  [[
  #include <float.h>
  /* minus_zerof represents the value -0.0f.  */
  /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0f.
     ICC 10.0 has a bug when optimizing the expression -zero.
     The expression -FLT_MIN * FLT_MIN does not work when cross-compiling
     to PowerPC on Mac OS X 10.5.  */
  #if defined __hpux || defined __sgi || defined __ICC
  static float
  compute_minus_zerof (void)
  {
    return -FLT_MIN * FLT_MIN;
  }
  # define minus_zerof compute_minus_zerof ()
  #else
  float minus_zerof = -0.0f;
  #endif
  ]])
  
  # Expands to code that defines a variable or macro minus_zerod.
  AC_DEFUN([gl_DOUBLE_MINUS_ZERO_CODE],
  [[
  #include <float.h>
  /* minus_zerod represents the value -0.0.  */
  /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
     ICC 10.0 has a bug when optimizing the expression -zero.
     The expression -DBL_MIN * DBL_MIN does not work when cross-compiling
     to PowerPC on Mac OS X 10.5.  */
  #if defined __hpux || defined __sgi || defined __ICC
  static double
  compute_minus_zerod (void)
  {
    return -DBL_MIN * DBL_MIN;
  }
  # define minus_zerod compute_minus_zerod ()
  #else
  double minus_zerod = -0.0;
  #endif
  ]])
  
  # Expands to code that defines a variable or macro minus_zerol.
  AC_DEFUN([gl_LONG_DOUBLE_MINUS_ZERO_CODE],
  [[
  #include <float.h>
  #if defined __i386__ && (defined __BEOS__ || defined __OpenBSD__)
  # undef LDBL_MIN
  # define LDBL_MIN        3.3621031431120935063E-4932L
  #endif
  /* minus_zerol represents the value -0.0L.  */
  /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L.
     IRIX cc can't put -0.0L into .data, but can compute at runtime.
     ICC 10.0 has a bug when optimizing the expression -zero.
     The expression -LDBL_MIN * LDBL_MIN does not work when cross-compiling
     to PowerPC on Mac OS X 10.5.  */
  #if defined __hpux || defined __sgi || defined __ICC
  static long double
  compute_minus_zerol (void)
  {
    return -LDBL_MIN * LDBL_MIN;
  }
  # define minus_zerol compute_minus_zerol ()
  #else
  long double minus_zerol = -0.0L;
  #endif
  ]])
  

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