CPU: Add a method instead of using friend access

src/ngraph/codegen/compiler.cpp

@@ -318,7 +318,7 @@ std::unique_ptr<llvm::Module> StaticCompiler::compile(Compiler* compiler, const
     m_compiler->getInvocation().getPreprocessorOpts().addRemappedFile(m_source_name, buffer.get());
 
     // Create and execute action
-    auto& compiler_action = compiler->compiler_action;
+    auto& compiler_action = compiler->get_compiler_action();
     compiler_action.reset(new EmitCodeGenOnlyAction());
     std::unique_ptr<llvm::Module> rc;
     if (m_compiler->ExecuteAction(*compiler_action) == true)

src/ngraph/codegen/compiler.hpp

@@ -50,13 +50,11 @@ private:
 
 class ngraph::codegen::Compiler
 {
-    friend StaticCompiler;
-
 public:
     Compiler();
     ~Compiler();
     std::unique_ptr<llvm::Module> compile(const std::string& source);
-
+    std::unique_ptr<clang::CodeGenAction>& get_compiler_action() { return compiler_action; }
 private:
     std::unique_ptr<clang::CodeGenAction> compiler_action;
 };