make_unique available since C++14.

src/libs/vdxf/libdxfrw/drw_base.h

@@ -82,6 +82,13 @@
 #endif // defined(__cplusplus)
 #endif // QT_VERSION < QT_VERSION_CHECK(5, 8, 0)
 
+#if ((defined(_MSVC_LANG) && _MSVC_LANG <= 201103L) || __cplusplus <= 201103L)
+template<typename T, typename... Args>
+std::unique_ptr<T> make_unique(Args&&... args) {
+    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
+#endif
+
 typedef signed char dint8;              /* 8 bit signed */
 typedef signed short dint16;            /* 16 bit signed */
 typedef signed int dint32;              /* 32 bit signed */