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25 lines
931 B
Text
25 lines
931 B
Text
# 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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