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25 lines
931 B
25 lines
931 B
# longlong.m4 serial 4 |
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dnl Copyright (C) 1999-2003 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 Paul Eggert. |
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# Define HAVE_LONG_LONG if 'long long' works. |
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AC_DEFUN([jm_AC_TYPE_LONG_LONG], |
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[ |
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AC_CACHE_CHECK([for long long], ac_cv_type_long_long, |
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[AC_TRY_LINK([long long ll = 1LL; int i = 63;], |
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[long long llmax = (long long) -1; |
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return ll << i | ll >> i | llmax / ll | llmax % ll;], |
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ac_cv_type_long_long=yes, |
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ac_cv_type_long_long=no)]) |
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if test $ac_cv_type_long_long = yes; then |
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AC_DEFINE(HAVE_LONG_LONG, 1, |
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[Define if you have the 'long long' type.]) |
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fi |
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])
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