From 0c113410fd98d326502e5caf2b14b5d53e15f83c Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 28 Feb 2019 16:27:12 +0200
Subject: Add note on inconsistent compiler behavior diagnostics

---
 build2/cc/compile-rule.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/build2/cc/compile-rule.cxx b/build2/cc/compile-rule.cxx
index dd95314..6a8e285 100644
--- a/build2/cc/compile-rule.cxx
+++ b/build2/cc/compile-rule.cxx
@@ -2837,6 +2837,8 @@ namespace build2
                 // - Using __COUNTER__ in #if which is incompatible with the
                 //   GCC's -fdirectives-only mode.
                 //
+                // - A Clang bug: https://bugs.llvm.org/show_bug.cgi?id=35580
+                //
                 // So let's show the yo-yo'ing command lines and ask the user
                 // to investigate.
                 //
-- 
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