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Diffstat (limited to 'm4/longlong.m4')
-rw-r--r-- | m4/longlong.m4 | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/m4/longlong.m4 b/m4/longlong.m4 new file mode 100644 index 000000000..3716c09f6 --- /dev/null +++ b/m4/longlong.m4 | |||
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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 | ]) | ||