Annotation of embedaddon/confuse/m4/longlong.m4, revision 1.1.1.1
1.1 misho 1: # longlong.m4 serial 8
2: dnl Copyright (C) 1999-2006 Free Software Foundation, Inc.
3: dnl This file is free software; the Free Software Foundation
4: dnl gives unlimited permission to copy and/or distribute it,
5: dnl with or without modifications, as long as this notice is preserved.
6:
7: dnl From Paul Eggert.
8:
9: # Define HAVE_LONG_LONG_INT if 'long long int' works.
10: # This fixes a bug in Autoconf 2.60, but can be removed once we
11: # assume 2.61 everywhere.
12:
13: # Note: If the type 'long long int' exists but is only 32 bits large
14: # (as on some very old compilers), AC_TYPE_LONG_LONG_INT will not be
15: # defined. In this case you can treat 'long long int' like 'long int'.
16:
17: AC_DEFUN([AC_TYPE_LONG_LONG_INT],
18: [
19: AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int],
20: [AC_LINK_IFELSE(
21: [AC_LANG_PROGRAM(
22: [[long long int ll = 9223372036854775807ll;
23: long long int nll = -9223372036854775807LL;
24: typedef int a[((-9223372036854775807LL < 0
25: && 0 < 9223372036854775807ll)
26: ? 1 : -1)];
27: int i = 63;]],
28: [[long long int llmax = 9223372036854775807ll;
29: return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i)
30: | (llmax / ll) | (llmax % ll));]])],
31: [ac_cv_type_long_long_int=yes],
32: [ac_cv_type_long_long_int=no])])
33: if test $ac_cv_type_long_long_int = yes; then
34: AC_DEFINE([HAVE_LONG_LONG_INT], 1,
35: [Define to 1 if the system has the type `long long int'.])
36: fi
37: ])
38:
39: # This macro is obsolescent and should go away soon.
40: AC_DEFUN([gl_AC_TYPE_LONG_LONG],
41: [
42: AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
43: ac_cv_type_long_long=$ac_cv_type_long_long_int
44: if test $ac_cv_type_long_long = yes; then
45: AC_DEFINE(HAVE_LONG_LONG, 1,
46: [Define if you have the 'long long' type.])
47: fi
48: ])
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