add DLL_LINKAGE + out-of-line dtor

lib/CMakeLists.txt

@@ -310,6 +310,7 @@ set(lib_MAIN_SRCS
 	CAndroidVMHelper.cpp
 	CBonusTypeHandler.cpp
 	CCreatureHandler.cpp
+	ConditionalWait.cpp
 	CPlayerState.cpp
 	CRandomGenerator.cpp
 	CScriptingModule.cpp

lib/ConditionalWait.cpp

@@ -0,0 +1,18 @@
+/*
+ * ConditionalWait.cpp, part of VCMI engine
+ *
+ * Authors: listed in file AUTHORS in main folder
+ *
+ * License: GNU General Public License v2.0 or later
+ * Full text of license available in license.txt file, in main folder
+ *
+ */
+#include "StdInc.h"
+#include "ConditionalWait.h"
+
+VCMI_LIB_NAMESPACE_BEGIN
+
+TerminationRequestedException::~TerminationRequestedException() = default;
+InterruptionRequestedException::~InterruptionRequestedException() = default;
+
+VCMI_LIB_NAMESPACE_END

lib/ConditionalWait.h

@@ -13,10 +13,11 @@
 
 VCMI_LIB_NAMESPACE_BEGIN
 
-class TerminationRequestedException : public std::exception
+class DLL_LINKAGE TerminationRequestedException : public std::exception
 {
 public:
 	using exception::exception;
+	~TerminationRequestedException() override;
 
 	const char* what() const noexcept override
 	{
@@ -24,10 +25,11 @@ public:
 	}
 };
 
-class InterruptionRequestedException : public std::exception
+class DLL_LINKAGE InterruptionRequestedException : public std::exception
 {
 public:
 	using exception::exception;
+	~InterruptionRequestedException() override;
 
 	const char* what() const noexcept override
 	{