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Annotation of embedaddon/confuse/m4/longdouble.m4, revision 1.1

1.1     ! misho       1: # longdouble.m4 serial 2 (gettext-0.15)
        !             2: dnl Copyright (C) 2002-2003, 2006 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: dnl From Bruno Haible.
        !             8: dnl Test whether the compiler supports the 'long double' type.
        !             9: dnl Prerequisite: AC_PROG_CC
        !            10: 
        !            11: dnl This file is only needed in autoconf <= 2.59.  Newer versions of autoconf
        !            12: dnl have a macro AC_TYPE_LONG_DOUBLE with identical semantics.
        !            13: 
        !            14: AC_DEFUN([gt_TYPE_LONGDOUBLE],
        !            15: [
        !            16:   AC_CACHE_CHECK([for long double], gt_cv_c_long_double,
        !            17:     [if test "$GCC" = yes; then
        !            18:        gt_cv_c_long_double=yes
        !            19:      else
        !            20:        AC_TRY_COMPILE([
        !            21:          /* The Stardent Vistra knows sizeof(long double), but does not support it.  */
        !            22:          long double foo = 0.0;
        !            23:          /* On Ultrix 4.3 cc, long double is 4 and double is 8.  */
        !            24:          int array [2*(sizeof(long double) >= sizeof(double)) - 1];
        !            25:          ], ,
        !            26:          gt_cv_c_long_double=yes, gt_cv_c_long_double=no)
        !            27:      fi])
        !            28:   if test $gt_cv_c_long_double = yes; then
        !            29:     AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the 'long double' type.])
        !            30:   fi
        !            31: ])