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authorNils Durner <durner@gnunet.org>2009-05-29 19:20:23 +0000
committerNils Durner <durner@gnunet.org>2009-05-29 19:20:23 +0000
commit179946965cc0f171e4af1bd053b42ec36314c86e (patch)
treedf49518ea91d8a644ecbd0e6a48c26c1e7fe93b3 /m4/longdouble.m4
parentc137702c332798fb68622739f61ae06bbf6286df (diff)
cp
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+# longdouble.m4 serial 2 (gettext-0.15)
+dnl Copyright (C) 2002-2003, 2006 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
+
+dnl This file is only needed in autoconf <= 2.59. Newer versions of autoconf
+dnl have a macro AC_TYPE_LONG_DOUBLE with identical semantics.
+
+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
+])