| 1 | # ulonglong.m4 serial 6 |
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| 2 | dnl Copyright (C) 1999-2006 Free Software Foundation, Inc. |
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| 3 | dnl This file is free software; the Free Software Foundation |
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| 4 | dnl gives unlimited permission to copy and/or distribute it, |
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| 5 | dnl with or without modifications, as long as this notice is preserved. |
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| 6 | |
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| 7 | dnl From Paul Eggert. |
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| 8 | |
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| 9 | # Define HAVE_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works. |
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| 10 | # This fixes a bug in Autoconf 2.60, but can be removed once we |
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| 11 | # assume 2.61 everywhere. |
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| 12 | |
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| 13 | # Note: If the type 'unsigned long long int' exists but is only 32 bits |
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| 14 | # large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT |
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| 15 | # will not be defined. In this case you can treat 'unsigned long long int' |
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| 16 | # like 'unsigned long int'. |
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| 17 | |
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| 18 | AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT], |
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| 19 | [ |
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| 20 | AC_CACHE_CHECK([for unsigned long long int], |
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| 21 | [ac_cv_type_unsigned_long_long_int], |
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| 22 | [AC_LINK_IFELSE( |
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| 23 | [AC_LANG_PROGRAM( |
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| 24 | [[unsigned long long int ull = 18446744073709551615ULL; |
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| 25 | typedef int a[(18446744073709551615ULL <= (unsigned long long int) -1 |
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| 26 | ? 1 : -1)]; |
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| 27 | int i = 63;]], |
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| 28 | [[unsigned long long int ullmax = 18446744073709551615ull; |
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| 29 | return (ull << 63 | ull >> 63 | ull << i | ull >> i |
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| 30 | | ullmax / ull | ullmax % ull);]])], |
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| 31 | [ac_cv_type_unsigned_long_long_int=yes], |
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| 32 | [ac_cv_type_unsigned_long_long_int=no])]) |
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| 33 | if test $ac_cv_type_unsigned_long_long_int = yes; then |
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| 34 | AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1, |
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| 35 | [Define to 1 if the system has the type `unsigned long long int'.]) |
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| 36 | fi |
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| 37 | ]) |
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| 38 | |
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| 39 | # This macro is obsolescent and should go away soon. |
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| 40 | AC_DEFUN([gl_AC_TYPE_UNSIGNED_LONG_LONG], |
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| 41 | [ |
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| 42 | AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT]) |
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| 43 | ac_cv_type_unsigned_long_long=$ac_cv_type_unsigned_long_long_int |
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| 44 | if test $ac_cv_type_unsigned_long_long = yes; then |
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| 45 | AC_DEFINE(HAVE_UNSIGNED_LONG_LONG, 1, |
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| 46 | [Define if you have the 'unsigned long long' type.]) |
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| 47 | fi |
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| 48 | ]) |
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