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dnl Available from the GNU Autoconf Macro Archive at:
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dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_c_long_long.html
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AC_DEFUN([AC_C_LONG_LONG],
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[AC_CACHE_CHECK(for long long int, ac_cv_c_long_long,
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[if test "$GCC" = yes; then
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AC_TRY_COMPILE(,[long long int i;],
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ac_cv_c_long_long=yes,
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if test $ac_cv_c_long_long = yes; then
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AC_DEFINE(HAVE_LONG_LONG)