1 files changed, 5 insertions, 0 deletions
diff --git a/clang/lib/Lex/PPDirectives.cpp b/clang/lib/Lex/PPDirectives.cpp
index ce86d0edca0..2dfb6233bdf 100644
--- a/clang/lib/Lex/PPDirectives.cpp
+++ b/clang/lib/Lex/PPDirectives.cpp
@@ -650,6 +650,11 @@ static bool GetLineValue(Token &DigitTok, unsigned &Val,
     return true;
   }
   
+  // Warn about hex and octal line numbers.  Do this after the check for 0,
+  // because it is octal.
+  if (Literal.getRadix() != 10) 
+    PP.Diag(DigitTok, diag::warn_pp_line_decimal);
+  
   return false;
 }