From f836462415a6da7338a27be052229adb9c7c447d Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 12 Mar 2021 12:49:53 +0200
Subject: Fixes

---
 libbutl/buildfile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libbutl/buildfile b/libbutl/buildfile
index df21f48..5398f71 100644
--- a/libbutl/buildfile
+++ b/libbutl/buildfile
@@ -39,6 +39,12 @@ lib{butl}: cxx{uuid-macos}:   include = ($tclass == 'macos')
 lib{butl}: cxx{uuid-windows}: include = $windows
 lib{butl}: cxx{uuid-freebsd}: include = ($tsys == 'freebsd' || $tsys == 'netbsd')
 
+# GCC prior to version 6 has flaky `#pragma GCC diagnostic` so we have to
+# disable certain warnings outright.
+#
+if ($cxx.id == 'gcc' && $cxx.version.major < 6)
+  cc.coptions += -Wno-unused-function
+
 # Additional system libraries.
 #
 switch $tclass, $tsys
-- 
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