From bc381359c7680c4cc15a0337843244f8dafe50b4 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Sun, 5 Mar 2023 16:49:55 -0800
Subject: [PATCH] ircd::spirit: Fix multiple definitions from
 phoenix::placeholders (GCC).

---
 include/ircd/spirit/boost.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/ircd/spirit/boost.h b/include/ircd/spirit/boost.h
index 3b88cd6af..6e3b37bcd 100644
--- a/include/ircd/spirit/boost.h
+++ b/include/ircd/spirit/boost.h
@@ -28,6 +28,12 @@
 #define BOOST_PHOENIX_DEBUG_HPP
 #endif
 
+// Multiple definitions from phoenix tuple impl with gcc+ld.gold; doesn't seem
+// to be a necessary header for our uses, so we guard it out.
+#if !defined(__clang__)
+#define BOOST_PHOENIX_STL_TUPLE_H_
+#endif
+
 // These must be included prior to the internal visibility/linkage sections.
 #include <boost/config.hpp>
 #include <boost/type_index.hpp>