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thodg/libiconv/m4/longdouble.m4

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  • Author : Bruno Haible
    Date : 2005-12-29 13:06:22
    Hash : 1f290a21
    Message : Update from GNU gettext.

  • m4/longdouble.m4
  • # longdouble.m4 serial 1 (gettext-0.12)
    dnl Copyright (C) 2002-2003 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.
    
    dnl From Bruno Haible.
    dnl Test whether the compiler supports the 'long double' type.
    dnl Prerequisite: AC_PROG_CC
    
    AC_DEFUN([gt_TYPE_LONGDOUBLE],
    [
      AC_CACHE_CHECK([for long double], gt_cv_c_long_double,
        [if test "$GCC" = yes; then
           gt_cv_c_long_double=yes
         else
           AC_TRY_COMPILE([
             /* The Stardent Vistra knows sizeof(long double), but does not support it.  */
             long double foo = 0.0;
             /* On Ultrix 4.3 cc, long double is 4 and double is 8.  */
             int array [2*(sizeof(long double) >= sizeof(double)) - 1];
             ], ,
             gt_cv_c_long_double=yes, gt_cv_c_long_double=no)
         fi])
      if test $gt_cv_c_long_double = yes; then
        AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the 'long double' type.])
      fi
    ])