| 1 | #serial 2
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| 2 |
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| 3 | dnl From Paul Eggert.
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| 4 |
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| 5 | # Define HAVE_LONG_LONG if 'long long' works.
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| 6 |
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| 7 | AC_DEFUN([jm_AC_TYPE_LONG_LONG],
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| 8 | [
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| 9 | AC_CACHE_CHECK([for long long], ac_cv_type_long_long,
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| 10 | [AC_TRY_LINK([long long ll = 1; int i = 63;],
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| 11 | [long long llmax = (long long) -1;
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| 12 | return ll << i | ll >> i | llmax / ll | llmax % ll;],
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| 13 | ac_cv_type_long_long=yes,
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| 14 | ac_cv_type_long_long=no)])
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| 15 | if test $ac_cv_type_long_long = yes; then
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| 16 | AC_DEFINE(HAVE_LONG_LONG, 1,
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| 17 | [Define if you have the long long type.])
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| 18 | fi
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| 19 | ])
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| 20 |
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| 21 | # Define HAVE_UNSIGNED_LONG_LONG if 'unsigned long long' works.
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| 22 |
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| 23 | AC_DEFUN([jm_AC_TYPE_UNSIGNED_LONG_LONG],
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| 24 | [
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| 25 | AC_CACHE_CHECK([for unsigned long long], ac_cv_type_unsigned_long_long,
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| 26 | [AC_TRY_LINK([unsigned long long ull = 1; int i = 63;],
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| 27 | [unsigned long long ullmax = (unsigned long long) -1;
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| 28 | return ull << i | ull >> i | ullmax / ull | ullmax % ull;],
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| 29 | ac_cv_type_unsigned_long_long=yes,
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| 30 | ac_cv_type_unsigned_long_long=no)])
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| 31 | if test $ac_cv_type_unsigned_long_long = yes; then
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| 32 | AC_DEFINE(HAVE_UNSIGNED_LONG_LONG, 1,
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| 33 | [Define if you have the unsigned long long type.])
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| 34 | fi
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| 35 | ])
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