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40 lines
1.4 KiB
40 lines
1.4 KiB
dnl -*- Autoconf -*-
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dnl Copyright (C) 1993-2005 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, Marcus Daniels, Sam Steingold, Paul Eggert.
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AC_PREREQ(2.57)
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AC_DEFUN([CL_LONGLONG],
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[AC_CACHE_CHECK(for long long type, cl_cv_c_longlong, [
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AC_TRY_RUN([int main()
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{
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/* long longs don't work right with gcc-2.7.2 on m68k */
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/* long longs don't work right with gcc-2.7.2 on rs6000: avcall/tests.c gets
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miscompiled. */
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#if defined(__m68k__) || (defined(_IBMR2) || defined(__powerpc))
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#if defined(__GNUC__) && (__GNUC__ == 2) && (__GNUC_MINOR__ <= 7)
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exit(1);
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#endif
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#endif
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{ long x = 944938507; long y = 737962842; long z = 162359677;
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exit(!(((long long) x)*((long long) y)>>32 == z));
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}
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}],
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cl_cv_c_longlong=yes, cl_cv_c_longlong=no, [
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dnl When cross-compiling, use the test from gnulib.
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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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cl_cv_c_longlong=yes,
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cl_cv_c_longlong=no)])
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])
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if test $cl_cv_c_longlong = yes; then
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AC_DEFINE(HAVE_LONGLONG,,[compiler supports the `long long' type])
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fi
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])
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