diff --git a/lldb/cmake/modules/AddLLDB.cmake b/lldb/cmake/modules/AddLLDB.cmake
--- a/lldb/cmake/modules/AddLLDB.cmake
+++ b/lldb/cmake/modules/AddLLDB.cmake
@@ -165,6 +165,15 @@
   else()
     set_target_properties(${name} PROPERTIES FOLDER "lldb libraries")
   endif()
+
+  # If we want to export all lldb symbols (i.e LLDB_EXPORT_ALL_SYMBOLS=ON), we
+  # need to use default visibility for all LLDB symbols even if a global
+  # `CMAKE_CXX_VISIBILITY_PRESET=hidden`is present.
+  if (LLDB_EXPORT_ALL_SYMBOLS)
+    if (CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU")
+      target_compile_options(${name} PRIVATE "-fvisibility=default")
+    endif()
+  endif()
 endfunction(add_lldb_library)
 
 function(add_lldb_executable name)