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authorLorenz <12514511+RincewindsHat@users.noreply.github.com>2023-03-11 10:34:47 (GMT)
committerGitHub <noreply@github.com>2023-03-11 10:34:47 (GMT)
commit75342b53853a898bdd93c7d3da9374115bab6b6d (patch)
tree0c0af2b796bcdd8ddd42187beb5badb420db8dea /gl/m4/assert_h.m4
parent6bbe0b7b0f609ecab831dec9be7690842bf0a0fc (diff)
parent357787868b5201ec3e874e7a225b1c944cbbdb4d (diff)
downloadmonitoring-plugins-75342b53853a898bdd93c7d3da9374115bab6b6d.tar.gz
Merge branch 'master' into patch-1refs/pull/1842/head
Diffstat (limited to 'gl/m4/assert_h.m4')
-rw-r--r--gl/m4/assert_h.m467
1 files changed, 67 insertions, 0 deletions
diff --git a/gl/m4/assert_h.m4 b/gl/m4/assert_h.m4
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1# assert-h.m4
2dnl Copyright (C) 2011-2023 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Paul Eggert.
8
9AC_DEFUN([gl_ASSERT_H],
10[
11 AC_CACHE_CHECK([for static_assert], [gl_cv_static_assert],
12 [gl_save_CFLAGS=$CFLAGS
13 for gl_working in "yes, a keyword" "yes, an <assert.h> macro"; do
14 AS_CASE([$gl_working],
15 [*assert.h*], [CFLAGS="$gl_save_CFLAGS -DINCLUDE_ASSERT_H"])
16
17 AC_COMPILE_IFELSE(
18 [AC_LANG_PROGRAM(
19 [[#if defined __clang__ && __STDC_VERSION__ < 202311
20 #pragma clang diagnostic error "-Wc2x-extensions"
21 #pragma clang diagnostic error "-Wc++17-extensions"
22 #endif
23 #ifdef INCLUDE_ASSERT_H
24 #include <assert.h>
25 #endif
26 static_assert (2 + 2 == 4, "arithmetic does not work");
27 static_assert (2 + 2 == 4);
28 ]],
29 [[
30 static_assert (sizeof (char) == 1, "sizeof does not work");
31 static_assert (sizeof (char) == 1);
32 ]])],
33 [gl_cv_static_assert=$gl_working],
34 [gl_cv_static_assert=no])
35 CFLAGS=$gl_save_CFLAGS
36 test "$gl_cv_static_assert" != no && break
37 done])
38
39 GL_GENERATE_ASSERT_H=false
40 AS_CASE([$gl_cv_static_assert],
41 [yes*keyword*],
42 [AC_DEFINE([HAVE_C_STATIC_ASSERT], [1],
43 [Define to 1 if the static_assert keyword works.])],
44 [no],
45 [GL_GENERATE_ASSERT_H=true
46 gl_NEXT_HEADERS([assert.h])])
47
48 dnl The "zz" puts this toward config.h's end, to avoid potential
49 dnl collisions with other definitions. #undef assert so that
50 dnl programs are not tempted to use it without specifically
51 dnl including assert.h. Break the #undef apart with a comment
52 dnl so that 'configure' does not comment it out.
53 AH_VERBATIM([zzstatic_assert],
54[#if (!defined HAVE_C_STATIC_ASSERT && !defined assert \
55 && (!defined __cplusplus \
56 || (__cpp_static_assert < 201411 \
57 && __GNUG__ < 6 && __clang_major__ < 6)))
58 #include <assert.h>
59 #undef/**/assert
60 /* Solaris 11.4 <assert.h> defines static_assert as a macro with 2 arguments.
61 We need it also to be invocable with a single argument. */
62 #if defined __sun && (__STDC_VERSION__ - 0 >= 201112L) && !defined __cplusplus
63 #undef/**/static_assert
64 #define static_assert _Static_assert
65 #endif
66#endif])
67])