From: Chris Lattner <sabre@nondot.org>
Date: Wed, 15 Apr 2009 22:38:06 +0000 (+0000)
Subject: add support for -Wextra and -W
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c83b60de5d0e76578f913f3fc9f3b0df0748fd83;p=clang

add support for -Wextra and -W



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69236 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Basic/Diagnostic.td b/include/clang/Basic/Diagnostic.td
index e842c5330d..0328fbcfc9 100644
--- a/include/clang/Basic/Diagnostic.td
+++ b/include/clang/Basic/Diagnostic.td
@@ -34,6 +34,12 @@ class InGroup<DiagGroup G> { DiagGroup Group = G; }
 def ImplicitFunctionDeclare : DiagGroup<"implicit-function-declaration">;
 def Trigraphs : DiagGroup<"trigraphs">;
 
+// Empty DiagGroups: these are recognized by clang but ignored.
+def : DiagGroup<"extra">;
+def : DiagGroup<"">;  // -W
+
+
+
 
 
 
diff --git a/tools/clang-cc/Warnings.cpp b/tools/clang-cc/Warnings.cpp
index af50ce4648..9cd1cc3c82 100644
--- a/tools/clang-cc/Warnings.cpp
+++ b/tools/clang-cc/Warnings.cpp
@@ -37,7 +37,7 @@ using namespace clang;
 // driver has stripped off -Wa,foo etc.  The driver has also translated -W to
 // -Wextra, so we don't need to worry about it.
 static llvm::cl::list<std::string>
-OptWarnings("W", llvm::cl::Prefix);
+OptWarnings("W", llvm::cl::Prefix, llvm::cl::ValueOptional);
 
 static llvm::cl::opt<bool> OptPedantic("pedantic");
 static llvm::cl::opt<bool> OptPedanticErrors("pedantic-errors");