[cmake] lldb: Turn of clang visibility macros if not CLANG_LINK_CLANG_DYLIB

This change mirrors
https://github.com/llvm/llvm-project/pull/108276/files#diff-4dd645a8b76bb3886a505258a8c2e598aeddea770e7b0a2b51689124a5ea6e9a.

Author: AnthonyLatsis

lldb/cmake/modules/AddLLDB.cmake

@@ -92,6 +92,19 @@ function(add_lldb_library name)
     ${pass_NO_INSTALL_RPATH}
   )
 
+  if(MSVC AND NOT CLANG_LINK_CLANG_DYLIB)
+    # Make sure all consumers also turn off visibility macros so the're not
+    # trying to dllimport symbols.
+    target_compile_definitions(${name} PUBLIC CLANG_BUILD_STATIC)
+    if(TARGET "obj.${name}")
+      target_compile_definitions("obj.${name}" PUBLIC CLANG_BUILD_STATIC)
+    endif()
+  elseif(NOT PARAM_SHARED AND NOT PARAM_STATIC)
+    # lldb component libraries linked in to clang-cpp are declared without
+    # SHARED or STATIC.
+    target_compile_definitions("obj.${name}" PUBLIC CLANG_EXPORTS)
+  endif()
+
   if(CLANG_LINK_CLANG_DYLIB)
     target_link_libraries(${name} PRIVATE clang-cpp)
   else()