From: Willy Tarreau <w@1wt.eu>
Date: Mon, 9 May 2022 17:45:06 +0000 (+0200)
Subject: MINOR: compiler: add a new macro to set an attribute on an enum when possible
X-Git-Tag: v2.6-dev10~71
X-Git-Url: http://git.haproxy.org/?a=commitdiff_plain;h=4fc2cd7c8e30fde56ab46d2b945615617b45e0f7;p=haproxy-3.0.git

MINOR: compiler: add a new macro to set an attribute on an enum when possible

Gcc 6 and above support placing an attribute on an enum's value. This
is convenient for marking some values as deprecated. We just need the
macro because older versions fail to parse __attribute__() there.
---

diff --git a/include/haproxy/compiler.h b/include/haproxy/compiler.h
index a23e62a..49356da 100644
--- a/include/haproxy/compiler.h
+++ b/include/haproxy/compiler.h
@@ -207,6 +207,14 @@
 	})
 #endif
 
+
+/* From gcc 6 and above, enum values may have attributes */
+#if __GNUC_PREREQ__(6, 0)
+#define ENUM_ATTRIBUTE(x) __attribute__(x)
+#else
+#define ENUM_ATTRIBUTE(x)
+#endif
+
 /* Some architectures have a double-word CAS, sometimes even dual-8 bytes.
  * Some architectures support unaligned accesses, others are fine with them
  * but only for non-atomic operations. Also mention those supporting unaligned