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49 lines
1.8 KiB
Plaintext
49 lines
1.8 KiB
Plaintext
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# ulonglong.m4 serial 6
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dnl Copyright (C) 1999-2006 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl From Paul Eggert.
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# Define HAVE_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works.
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# This fixes a bug in Autoconf 2.60, but can be removed once we
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# assume 2.61 everywhere.
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# Note: If the type 'unsigned long long int' exists but is only 32 bits
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# large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT
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# will not be defined. In this case you can treat 'unsigned long long int'
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# like 'unsigned long int'.
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AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT],
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[
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AC_CACHE_CHECK([for unsigned long long int],
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[ac_cv_type_unsigned_long_long_int],
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[AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[unsigned long long int ull = 18446744073709551615ULL;
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typedef int a[(18446744073709551615ULL <= (unsigned long long int) -1
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? 1 : -1)];
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int i = 63;]],
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[[unsigned long long int ullmax = 18446744073709551615ull;
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return (ull << 63 | ull >> 63 | ull << i | ull >> i
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| ullmax / ull | ullmax % ull);]])],
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[ac_cv_type_unsigned_long_long_int=yes],
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[ac_cv_type_unsigned_long_long_int=no])])
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if test $ac_cv_type_unsigned_long_long_int = yes; then
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AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1,
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[Define to 1 if the system has the type `unsigned long long int'.])
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fi
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])
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# This macro is obsolescent and should go away soon.
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AC_DEFUN([gl_AC_TYPE_UNSIGNED_LONG_LONG],
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[
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AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
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ac_cv_type_unsigned_long_long=$ac_cv_type_unsigned_long_long_int
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if test $ac_cv_type_unsigned_long_long = yes; then
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AC_DEFINE(HAVE_UNSIGNED_LONG_LONG, 1,
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[Define if you have the 'unsigned long long' type.])
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fi
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])
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