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diff --git a/indra/newview/lllicenseinfo.h b/indra/newview/lllicenseinfo.h
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+/** 
+ * @file llicenseinfo.h
+ * @brief Routines to access library versions and license information
+ * @author Aech Linden
+ *
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2021, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLLICENSEINFO_H
+#define LL_LLLICENSEINFO_H
+
+#include "stdtypes.h"
+#include "llsingleton.h"
+#include <string>
+
+///
+/// This API provides license information for the viewer.
+/// The singleton is initialized once (from package-info.txt), after which
+/// it acts like a map of name => {version, copyrights} for each library.
+///
+class LLLicenseInfo: public LLSingleton<LLLicenseInfo>
+{
+	LLSINGLETON(LLLicenseInfo);
+    
+public:
+    struct LibraryData
+    {
+        std::string version;
+        std::string copyrights;
+    };
+    typedef std::map<std::string, LibraryData> LibraryMap;
+    
+	/// return the version as a string of the requested library, like "2.0.0.200030"
+    const std::string& getVersion(const std::string& library_name) const { return mLibraries.at(library_name).version; }
+    
+    /// return an indication of whether any library data was found (e.g., false if packages-info.txt is missing)
+    bool empty() const noexcept { return mLibraries.empty(); };
+
+    LibraryMap::const_iterator begin() const noexcept { return mLibraries.begin(); };
+    LibraryMap::const_iterator end() const noexcept { return mLibraries.end(); };
+
+protected:
+    virtual void initSingleton();;
+private:
+    LibraryMap mLibraries{};
+};
+
+#endif