New upstream version 3.3.0upstream/3.3.0upstream

1 files changed, 24 insertions, 3 deletions

diff --git a/Compat.h b/Compat.h
index 1c4794e..2bc12dc 100644
--- a/Compat.h
+++ b/Compat.h
@@ -7,10 +7,9 @@ Released under the GNU GPLv2+, see the COPYING file
 in the source distribution for its full text.
 */
 
-#include "config.h" // IWYU pragma: keep
-
+#include <assert.h> // IWYU pragma: keep
 #include <fcntl.h>
-#include <stddef.h>
+#include <stddef.h> // IWYU pragma: keep
 #include <unistd.h>
 #include <sys/stat.h> // IWYU pragma: keep
 
@@ -61,4 +60,26 @@ ssize_t Compat_readlink(openat_arg_t dirfd,
                         char* buf,
                         size_t bufsize);
 
+/*
+ * static_assert() hack for pre-C11
+ * TODO: drop after moving to -std=c11 or newer
+ */
+
+/* C11 guarantees _Static_assert is a keyword */
+#if (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112L
+# if !defined(_Static_assert)
+#  define _Static_assert(expr, msg)                                    \
+   extern int (*__Static_assert_function (void))                       \
+      [!!sizeof (struct { int __error_if_negative: (expr) ? 2 : -1; })]
+# endif
+#endif
+
+/* C23 will guarantee static_assert is a keyword or a macro */
+/* FIXME: replace 202300L with proper value once C23 is published */
+#if (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 202300L
+# if !defined(static_assert)
+#  define static_assert(expr, msg) _Static_assert(expr, msg)
+# endif
+#endif
+
 #endif /* HEADER_Compat */