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author | RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> | 2021-11-17 01:05:54 +0100 |
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committer | RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> | 2022-07-24 19:35:11 +0200 |
commit | a405fc138596f552581d2011fd6de02d5c8186c4 (patch) | |
tree | 4c084700b5cb5e9fcedf982a2d921bbc41d9935a /gl/m4/builtin-expect.m4 | |
parent | 9f2a9ca3d72023ff9b5707d1872c54d65edc9017 (diff) | |
download | monitoring-plugins-a405fc138596f552581d2011fd6de02d5c8186c4.tar.gz |
Sync with the latest Gnulib code (1a268176f)
Diffstat (limited to 'gl/m4/builtin-expect.m4')
-rw-r--r-- | gl/m4/builtin-expect.m4 | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/gl/m4/builtin-expect.m4 b/gl/m4/builtin-expect.m4 new file mode 100644 index 00000000..c5841164 --- /dev/null +++ b/gl/m4/builtin-expect.m4 | |||
@@ -0,0 +1,49 @@ | |||
1 | dnl Check for __builtin_expect. | ||
2 | |||
3 | dnl Copyright 2016-2021 Free Software Foundation, Inc. | ||
4 | dnl This file is free software; the Free Software Foundation | ||
5 | dnl gives unlimited permission to copy and/or distribute it, | ||
6 | dnl with or without modifications, as long as this notice is preserved. | ||
7 | |||
8 | dnl Written by Paul Eggert. | ||
9 | |||
10 | AC_DEFUN([gl___BUILTIN_EXPECT], | ||
11 | [ | ||
12 | AC_CACHE_CHECK([for __builtin_expect], | ||
13 | [gl_cv___builtin_expect], | ||
14 | [AC_LINK_IFELSE( | ||
15 | [AC_LANG_SOURCE([[ | ||
16 | int | ||
17 | main (int argc, char **argv) | ||
18 | { | ||
19 | argc = __builtin_expect (argc, 100); | ||
20 | return argv[argc != 100][0]; | ||
21 | }]])], | ||
22 | [gl_cv___builtin_expect=yes], | ||
23 | [AC_LINK_IFELSE( | ||
24 | [AC_LANG_SOURCE([[ | ||
25 | #include <builtins.h> | ||
26 | int | ||
27 | main (int argc, char **argv) | ||
28 | { | ||
29 | argc = __builtin_expect (argc, 100); | ||
30 | return argv[argc != 100][0]; | ||
31 | }]])], | ||
32 | [gl_cv___builtin_expect="in <builtins.h>"], | ||
33 | [gl_cv___builtin_expect=no])])]) | ||
34 | if test "$gl_cv___builtin_expect" = yes; then | ||
35 | AC_DEFINE([HAVE___BUILTIN_EXPECT], [1]) | ||
36 | elif test "$gl_cv___builtin_expect" = "in <builtins.h>"; then | ||
37 | AC_DEFINE([HAVE___BUILTIN_EXPECT], [2]) | ||
38 | fi | ||
39 | AH_VERBATIM([HAVE___BUILTIN_EXPECT], | ||
40 | [/* Define to 1 if the compiler supports __builtin_expect, | ||
41 | and to 2 if <builtins.h> does. */ | ||
42 | #undef HAVE___BUILTIN_EXPECT | ||
43 | #ifndef HAVE___BUILTIN_EXPECT | ||
44 | # define __builtin_expect(e, c) (e) | ||
45 | #elif HAVE___BUILTIN_EXPECT == 2 | ||
46 | # include <builtins.h> | ||
47 | #endif | ||
48 | ]) | ||
49 | ]) | ||