diff --git a/lldb/include/lldb/Expression/ExpressionVariable.h b/lldb/include/lldb/Expression/ExpressionVariable.h
--- a/lldb/include/lldb/Expression/ExpressionVariable.h
+++ b/lldb/include/lldb/Expression/ExpressionVariable.h
@@ -29,8 +29,7 @@
 
   LLVMCastKind getKind() const { return m_kind; }
 
-  ExpressionVariable(LLVMCastKind kind) : m_flags(0), m_kind(kind) {}
-
+  ExpressionVariable(LLVMCastKind kind);
   virtual ~ExpressionVariable();
 
   std::optional<uint64_t> GetByteSize() { return m_frozen_sp->GetByteSize(); }
@@ -208,8 +207,7 @@
 
   LLVMCastKind getKind() const { return m_kind; }
 
-  PersistentExpressionState(LLVMCastKind kind) : m_kind(kind) {}
-
+  PersistentExpressionState(LLVMCastKind kind);
   virtual ~PersistentExpressionState();
 
   virtual lldb::ExpressionVariableSP
diff --git a/lldb/include/lldb/Expression/Materializer.h b/lldb/include/lldb/Expression/Materializer.h
--- a/lldb/include/lldb/Expression/Materializer.h
+++ b/lldb/include/lldb/Expression/Materializer.h
@@ -69,6 +69,7 @@
 
   class PersistentVariableDelegate {
   public:
+    PersistentVariableDelegate();
     virtual ~PersistentVariableDelegate();
     virtual ConstString GetName() = 0;
     virtual void DidDematerialize(lldb::ExpressionVariableSP &variable) = 0;
diff --git a/lldb/include/lldb/Symbol/TypeSystem.h b/lldb/include/lldb/Symbol/TypeSystem.h
--- a/lldb/include/lldb/Symbol/TypeSystem.h
+++ b/lldb/include/lldb/Symbol/TypeSystem.h
@@ -77,6 +77,7 @@
                    public std::enable_shared_from_this<TypeSystem> {
 public:
   // Constructors and Destructors
+  TypeSystem();
   ~TypeSystem() override;
 
   // LLVM RTTI support
diff --git a/lldb/source/Expression/ExpressionVariable.cpp b/lldb/source/Expression/ExpressionVariable.cpp
--- a/lldb/source/Expression/ExpressionVariable.cpp
+++ b/lldb/source/Expression/ExpressionVariable.cpp
@@ -15,6 +15,8 @@
 
 using namespace lldb_private;
 
+ExpressionVariable::ExpressionVariable(LLVMCastKind kind)
+    : m_flags(0), m_kind(kind) {}
 ExpressionVariable::~ExpressionVariable() = default;
 
 uint8_t *ExpressionVariable::GetValueBytes() {
@@ -30,6 +32,8 @@
   return nullptr;
 }
 
+PersistentExpressionState::PersistentExpressionState(LLVMCastKind kind)
+    : m_kind(kind) {}
 PersistentExpressionState::~PersistentExpressionState() = default;
 
 lldb::addr_t PersistentExpressionState::LookupSymbol(ConstString name) {
diff --git a/lldb/source/Expression/Materializer.cpp b/lldb/source/Expression/Materializer.cpp
--- a/lldb/source/Expression/Materializer.cpp
+++ b/lldb/source/Expression/Materializer.cpp
@@ -1598,5 +1598,7 @@
   m_process_address = LLDB_INVALID_ADDRESS;
 }
 
+Materializer::PersistentVariableDelegate::PersistentVariableDelegate() =
+    default;
 Materializer::PersistentVariableDelegate::~PersistentVariableDelegate() =
     default;
diff --git a/lldb/source/Symbol/TypeSystem.cpp b/lldb/source/Symbol/TypeSystem.cpp
--- a/lldb/source/Symbol/TypeSystem.cpp
+++ b/lldb/source/Symbol/TypeSystem.cpp
@@ -36,6 +36,7 @@
 bool LanguageSet::Empty() const { return bitvector.none(); }
 bool LanguageSet::operator[](unsigned i) const { return bitvector[i]; }
 
+TypeSystem::TypeSystem() = default;
 TypeSystem::~TypeSystem() = default;
 
 static TypeSystemSP CreateInstanceHelper(lldb::LanguageType language,