diff --git a/src/Makefile_obj.in b/src/Makefile_obj.in
index 4c50d5a64..93b1e3d93 100644
--- a/src/Makefile_obj.in
+++ b/src/Makefile_obj.in
@@ -193,6 +193,7 @@ RAW_OBJS = \
 	V3FileLine.o \
 	V3Gate.o \
 	V3GenClk.o \
+	V3Global.o \
 	V3Graph.o \
 	V3GraphAlg.o \
 	V3GraphAcyc.o \
diff --git a/src/V3Global.cpp b/src/V3Global.cpp
new file mode 100644
index 000000000..62a53f233
--- /dev/null
+++ b/src/V3Global.cpp
@@ -0,0 +1,86 @@
+// -*- mode: C++; c-file-style: "cc-mode" -*-
+//*************************************************************************
+// DESCRIPTION: Verilator: Common implemenetations
+//
+// Code available from: https://verilator.org
+//
+//*************************************************************************
+//
+// Copyright 2004-2020 by Wilson Snyder.  This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+//
+// Verilator 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 General Public License for more details.
+//
+//*************************************************************************
+
+#include "config_build.h"
+#include "verilatedos.h"
+
+#include "V3Global.h"
+#include "V3Ast.h"
+#include "V3File.h"
+#include "V3LinkCells.h"
+#include "V3Parse.h"
+#include "V3ParseSym.h"
+#include "V3Stats.h"
+
+//######################################################################
+// V3 Class -- top level
+
+AstNetlist* V3Global::makeNetlist() {
+    AstNetlist* newp = new AstNetlist();
+    newp->addTypeTablep(new AstTypeTable(newp->fileline()));
+    return newp;
+}
+
+void V3Global::checkTree() { rootp()->checkTree(); }
+
+void V3Global::clear() {
+    if (m_rootp) VL_DO_CLEAR(m_rootp->deleteTree(), m_rootp = NULL);
+}
+
+void V3Global::readFiles() {
+    // NODE STATE
+    //   AstNode::user4p()      // VSymEnt*    Package and typedef symbol names
+    AstUser4InUse inuser4;
+
+    VInFilter filter(v3Global.opt.pipeFilter());
+    V3ParseSym parseSyms(v3Global.rootp());  // Symbol table must be common across all parsing
+
+    V3Parse parser(v3Global.rootp(), &filter, &parseSyms);
+    // Read top module
+    const V3StringList& vFiles = v3Global.opt.vFiles();
+    for (V3StringList::const_iterator it = vFiles.begin(); it != vFiles.end(); ++it) {
+        string filename = *it;
+        parser.parseFile(new FileLine(FileLine::commandLineFilename()), filename, false,
+                         "Cannot find file containing module: ");
+    }
+
+    // Read libraries
+    // To be compatible with other simulators,
+    // this needs to be done after the top file is read
+    const V3StringSet& libraryFiles = v3Global.opt.libraryFiles();
+    for (V3StringSet::const_iterator it = libraryFiles.begin(); it != libraryFiles.end(); ++it) {
+        string filename = *it;
+        parser.parseFile(new FileLine(FileLine::commandLineFilename()), filename, true,
+                         "Cannot find file containing library module: ");
+    }
+    // v3Global.rootp()->dumpTreeFile(v3Global.debugFilename("parse.tree"));
+    V3Error::abortIfErrors();
+
+    if (!v3Global.opt.preprocOnly()) {
+        // Resolve all modules cells refer to
+        V3LinkCells::link(v3Global.rootp(), &filter, &parseSyms);
+    }
+}
+
+void V3Global::dumpCheckGlobalTree(const string& stagename, int newNumber, bool doDump) {
+    v3Global.rootp()->dumpTreeFile(v3Global.debugFilename(stagename + ".tree", newNumber),
+                                   false, doDump);
+    if (v3Global.opt.stats()) V3Stats::statsStage(stagename);
+}
diff --git a/src/Verilator.cpp b/src/Verilator.cpp
index 80c3e7a2d..4fc513b41 100644
--- a/src/Verilator.cpp
+++ b/src/Verilator.cpp
@@ -100,67 +100,7 @@
 
 V3Global v3Global;
 
-//######################################################################
-// V3 Class -- top level
-
-AstNetlist* V3Global::makeNetlist() {
-    AstNetlist* newp = new AstNetlist();
-    newp->addTypeTablep(new AstTypeTable(newp->fileline()));
-    return newp;
-}
-
-void V3Global::checkTree() { rootp()->checkTree(); }
-
-void V3Global::clear() {
-    if (m_rootp) VL_DO_CLEAR(m_rootp->deleteTree(), m_rootp = NULL);
-}
-
-void V3Global::readFiles() {
-    // NODE STATE
-    //   AstNode::user4p()      // VSymEnt*    Package and typedef symbol names
-    AstUser4InUse       inuser4;
-
-    VInFilter filter (v3Global.opt.pipeFilter());
-    V3ParseSym parseSyms (v3Global.rootp());  // Symbol table must be common across all parsing
-
-    V3Parse parser (v3Global.rootp(), &filter, &parseSyms);
-    // Read top module
-    const V3StringList& vFiles = v3Global.opt.vFiles();
-    for (V3StringList::const_iterator it = vFiles.begin(); it != vFiles.end(); ++it) {
-        string filename = *it;
-        parser.parseFile(new FileLine(FileLine::commandLineFilename()),
-                         filename, false,
-                         "Cannot find file containing module: ");
-    }
-
-    // Read libraries
-    // To be compatible with other simulators,
-    // this needs to be done after the top file is read
-    const V3StringSet& libraryFiles = v3Global.opt.libraryFiles();
-    for (V3StringSet::const_iterator it = libraryFiles.begin(); it != libraryFiles.end(); ++it) {
-        string filename = *it;
-        parser.parseFile(new FileLine(FileLine::commandLineFilename()),
-                         filename, true,
-                         "Cannot find file containing library module: ");
-    }
-    //v3Global.rootp()->dumpTreeFile(v3Global.debugFilename("parse.tree"));
-    V3Error::abortIfErrors();
-
-    if (!v3Global.opt.preprocOnly()) {
-        // Resolve all modules cells refer to
-        V3LinkCells::link(v3Global.rootp(), &filter, &parseSyms);
-    }
-}
-
-void V3Global::dumpCheckGlobalTree(const string& stagename, int newNumber, bool doDump) {
-    v3Global.rootp()->dumpTreeFile(v3Global.debugFilename(stagename+".tree", newNumber),
-                                   false, doDump);
-    if (v3Global.opt.stats()) V3Stats::statsStage(stagename);
-}
-
-//######################################################################
-
-void process() {
+static void process() {
     // Sort modules by level so later algorithms don't need to care
     V3LinkLevel::modSortByLevel();
     V3Error::abortIfErrors();