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-rw-r--r--libbuild2/cc/compile-rule.cxx2
1 files changed, 2 insertions, 0 deletions
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,