2007-10-23 10:48:09 +00:00
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# longdouble.m4 serial 2 (gettext-0.15)
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dnl Copyright (C) 2002-2003, 2006 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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2004-07-27 15:12:00 +00:00
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dnl From Bruno Haible.
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dnl Test whether the compiler supports the 'long double' type.
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dnl Prerequisite: AC_PROG_CC
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2007-10-23 10:48:09 +00:00
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dnl This file is only needed in autoconf <= 2.59. Newer versions of autoconf
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dnl have a macro AC_TYPE_LONG_DOUBLE with identical semantics.
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2004-07-27 15:12:00 +00:00
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AC_DEFUN([gt_TYPE_LONGDOUBLE],
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[
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AC_CACHE_CHECK([for long double], gt_cv_c_long_double,
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[if test "$GCC" = yes; then
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gt_cv_c_long_double=yes
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else
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AC_TRY_COMPILE([
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/* The Stardent Vistra knows sizeof(long double), but does not support it. */
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long double foo = 0.0;
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/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
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int array [2*(sizeof(long double) >= sizeof(double)) - 1];
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], ,
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gt_cv_c_long_double=yes, gt_cv_c_long_double=no)
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fi])
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if test $gt_cv_c_long_double = yes; then
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AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the 'long double' type.])
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fi
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])
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