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Annotation of embedaddon/confuse/m4/longdouble.m4, revision 1.1.1.1

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: ])