[NFC][Docs] Fix RAVFrontendAction doc's CMakeLists.txt for shared build

It should fix following error:

  Undefined symbols for architecture x86_64:
    "llvm::outs()", referenced from:
        FindNamedClassVisitor::VisitCXXRecordDecl(clang::CXXRecordDecl*) in FindClassDecls.cpp.o

diff --git a/clang/docs/RAVFrontendAction.rst b/clang/docs/RAVFrontendAction.rst
index 71722a1..e38276b 100644 (file)
--- a/clang/docs/RAVFrontendAction.rst
+++ b/clang/docs/RAVFrontendAction.rst
@@ -205,6 +205,10 @@ following CMakeLists.txt to link it:
 
 ::
 
+    set(LLVM_LINK_COMPONENTS
+      Support
+      )
+
     add_clang_executable(find-class-decls FindClassDecls.cpp)
 
     target_link_libraries(find-class-decls