From 19e7fce9b415f57d2477bed47b5ebc9eb8fc1d4d Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 11 Jan 2022 07:59:04 +0200
Subject: Add note on MSVC warning C4819

---
 libbuild2/cc/compile-rule.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libbuild2/cc/compile-rule.cxx b/libbuild2/cc/compile-rule.cxx
index e55754a..29b32c6 100644
--- a/libbuild2/cc/compile-rule.cxx
+++ b/libbuild2/cc/compile-rule.cxx
@@ -3015,6 +3015,8 @@ namespace build2
       //
       // So seeing that it is hard to trigger a legitimate VC preprocessor
       // warning, for now, we will just treat them as errors by adding /WX.
+      // BTW, another example of a plausible preprocessor warning is C4819
+      // (character unrepresentable in source charset).
       //
       // Finally, if we are using the module mapper, then all this mess falls
       // away: we only run the compiler once, we let the diagnostics through,
-- 
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