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30 lines
1.2 KiB
30 lines
1.2 KiB
# longdouble.m4 serial 1 (gettext-0.12) |
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dnl Copyright (C) 2002-2003 Free Software Foundation, Inc. |
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dnl This file is free software, distributed under the terms of the GNU |
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dnl General Public License. As a special exception to the GNU General |
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dnl Public License, this file may be distributed as part of a program |
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dnl that contains a configuration script generated by Autoconf, under |
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dnl the same distribution terms as the rest of that program. |
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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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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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