From: Alejandro Colomar <alx@kernel.org>
Date: Thu, 7 Aug 2025 12:28:22 +0000 (+0200)
Subject: lib/attr.h: MAYBE_UNUSED: Implement with [[maybe_unused]]
X-Git-Tag: 4.19.0-rc1~84
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c07265c16f1941a1d4e746740ffd4f12d84ec9fe;p=thirdparty%2Fshadow.git

lib/attr.h: MAYBE_UNUSED: Implement with [[maybe_unused]]

This is a C23 standard attribute with the same semantics.

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---

diff --git a/lib/attr.h b/lib/attr.h
index 8150ddb60..7d1bf3755 100644
--- a/lib/attr.h
+++ b/lib/attr.h
@@ -10,14 +10,18 @@
 #endif
 
 
+#if __has_c_attribute(maybe_unused)
+# define MAYBE_UNUSED                [[maybe_unused]]
+#else
+# define MAYBE_UNUSED
+#endif
+
 #if (__GNUC__ >= 10)
-# define MAYBE_UNUSED                [[gnu::unused]]
 # define NORETURN                    [[gnu::__noreturn__]]
 # define format_attr(type, fmt, va)  [[gnu::format(type, fmt, va)]]
 # define ATTR_ACCESS(...)            [[gnu::access(__VA_ARGS__)]]
 # define ATTR_ALLOC_SIZE(...)        [[gnu::alloc_size(__VA_ARGS__)]]
 #else
-# define MAYBE_UNUSED
 # define NORETURN
 # define format_attr(type, fmt, va)
 # define ATTR_ACCESS(...)