2013-04-04  Andras Becsi  <andras.becsi@digia.com>

        Fix the build with GCC 4.8
        https://bugs.webkit.org/show_bug.cgi?id=113147

        Initialize JSObject* exception to suppress warnings that make
        the build fail because of -Werror=maybe-uninitialized.

        * runtime/Executable.cpp:
        (JSC::FunctionExecutable::compileForCallInternal):
        (JSC::FunctionExecutable::compileForConstructInternal):

        Fix the build with GCC 4.8
        https://bugs.webkit.org/show_bug.cgi?id=113147

        Disable diagnostic warning -Wunused-local-typedefs for GCC 4.8
        since dummy typedefs are commonly used in the codebase.

        * wtf/Compiler.h:

diff --git a/Source/JavaScriptCore/runtime/Executable.cpp b/Source/JavaScriptCore/runtime/Executable.cpp
index 8b58b62aa3e39a347fae92961af69484de795a07..057bb43c6777bc4b63b23c0cabf32d106ca0243c 100644
--- a/Source/JavaScriptCore/runtime/Executable.cpp
@@ -515,7 +515,7 @@
     UNUSED_PARAM(bytecodeIndex);
 #endif
     ASSERT((jitType == JITCode::bottomTierJIT()) == !m_codeBlockForCall);
-    JSObject* exception;
+    JSObject* exception = 0;
     OwnPtr<FunctionCodeBlock> newCodeBlock = produceCodeBlockFor(scopeChainNode, !!m_codeBlockForCall ? OptimizingCompilation : FirstCompilation, CodeForCall, exception);
     if (!newCodeBlock)
         return exception;
@@ -558,7 +558,7 @@
 #endif
     
     ASSERT((jitType == JITCode::bottomTierJIT()) == !m_codeBlockForConstruct);
-    JSObject* exception;
+    JSObject* exception = 0;
     OwnPtr<FunctionCodeBlock> newCodeBlock = produceCodeBlockFor(scopeChainNode, !!m_codeBlockForConstruct ? OptimizingCompilation : FirstCompilation, CodeForConstruct, exception);
     if (!newCodeBlock)
         return exception;
diff --git a/Source/WTF/wtf/Compiler.h b/Source/WTF/wtf/Compiler.h
index e11747fb6519fe59560b47aabbe5480e98a9f155..b886f37151292851f311306b90fa5b9bc2880e06 100644
--- a/Source/WTF/wtf/Compiler.h
+++ b/Source/WTF/wtf/Compiler.h
@@ -122,6 +122,9 @@
 
 /* Specific compiler features */
 #if COMPILER(GCC) && !COMPILER(CLANG)
+#if GCC_VERSION_AT_LEAST(4, 8, 0)
+#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
+#endif
 #if GCC_VERSION_AT_LEAST(4, 7, 0) && __cplusplus >= 201103L
 #define WTF_COMPILER_SUPPORTS_CXX_RVALUE_REFERENCES 1
 #define WTF_COMPILER_SUPPORTS_CXX_DELETED_FUNCTIONS 1