diff --git a/COPYING b/COPYING
index d60c31a97a..4f5b160681 100644
--- a/COPYING
+++ b/COPYING
@@ -1,3 +1,11 @@
+
+*********************************************************************
+  As a special exception, you have permission to link this program
+  with the CGAL library and distribute executables, as long as you
+  follow the requirements of the GNU GPL in regard to all of the
+  software in the executable aside from CGAL.
+*********************************************************************
+
 		    GNU GENERAL PUBLIC LICENSE
 		       Version 2, June 1991
 
diff --git a/src/Preferences.cc b/src/Preferences.cc
index cfc2bdb3ff..236a73caa1 100644
--- a/src/Preferences.cc
+++ b/src/Preferences.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/context.cc b/src/context.cc
index 961c107f84..0080e5039c 100644
--- a/src/context.cc
+++ b/src/context.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/control.cc b/src/control.cc
index f1f53dac11..d0b96a10b6 100644
--- a/src/control.cc
+++ b/src/control.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/csgops.cc b/src/csgops.cc
index a4780a13aa..f8f89951f3 100644
--- a/src/csgops.cc
+++ b/src/csgops.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/csgterm.cc b/src/csgterm.cc
index bc22511c06..942aba66d8 100644
--- a/src/csgterm.cc
+++ b/src/csgterm.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/dxfdata.cc b/src/dxfdata.cc
index 9d6107acdd..dc3e8a1914 100644
--- a/src/dxfdata.cc
+++ b/src/dxfdata.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/dxfdim.cc b/src/dxfdim.cc
index 5741df3a4b..4b0cb59585 100644
--- a/src/dxfdim.cc
+++ b/src/dxfdim.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/dxflinextrude.cc b/src/dxflinextrude.cc
index 94b6904dff..0542493d37 100644
--- a/src/dxflinextrude.cc
+++ b/src/dxflinextrude.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/dxfrotextrude.cc b/src/dxfrotextrude.cc
index ae32a672db..ae43f53398 100644
--- a/src/dxfrotextrude.cc
+++ b/src/dxfrotextrude.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/dxftess.cc b/src/dxftess.cc
index 4b22d7fad7..c51fb9cb49 100644
--- a/src/dxftess.cc
+++ b/src/dxftess.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/export.cc b/src/export.cc
index 840525c367..2469947603 100644
--- a/src/export.cc
+++ b/src/export.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/expr.cc b/src/expr.cc
index 860cb96d76..35fc776e21 100644
--- a/src/expr.cc
+++ b/src/expr.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/func.cc b/src/func.cc
index 2833448a74..76be58835d 100644
--- a/src/func.cc
+++ b/src/func.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/glview.cc b/src/glview.cc
index a6db48f29b..dc42a7f8b1 100644
--- a/src/glview.cc
+++ b/src/glview.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/highlighter.cc b/src/highlighter.cc
index 5a9f7b1194..d5f729dc82 100644
--- a/src/highlighter.cc
+++ b/src/highlighter.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/import.cc b/src/import.cc
index 4fe6c09628..f346407aca 100644
--- a/src/import.cc
+++ b/src/import.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/lexer.l b/src/lexer.l
index 2130948b0d..5820107c43 100644
--- a/src/lexer.l
+++ b/src/lexer.l
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/mainwin.cc b/src/mainwin.cc
index 58c539d7e4..9ee4d9d34f 100644
--- a/src/mainwin.cc
+++ b/src/mainwin.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/module.cc b/src/module.cc
index f2c6e942f8..51d191e444 100644
--- a/src/module.cc
+++ b/src/module.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/nef2dxf.cc b/src/nef2dxf.cc
index 6b60536fc4..5df8a45a05 100644
--- a/src/nef2dxf.cc
+++ b/src/nef2dxf.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/node.cc b/src/node.cc
index e969be24d5..e4d14778e5 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/openscad.cc b/src/openscad.cc
index 39390409d9..0974a1163b 100644
--- a/src/openscad.cc
+++ b/src/openscad.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/openscad.h b/src/openscad.h
index 25480bb50a..e256433b03 100644
--- a/src/openscad.h
+++ b/src/openscad.h
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/parser.y b/src/parser.y
index 8d986feb0e..7bee0c1396 100644
--- a/src/parser.y
+++ b/src/parser.y
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/polyset.cc b/src/polyset.cc
index 6ddc737736..0285b95efb 100644
--- a/src/polyset.cc
+++ b/src/polyset.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/primitives.cc b/src/primitives.cc
index 522fc62433..14ecea6413 100644
--- a/src/primitives.cc
+++ b/src/primitives.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/projection.cc b/src/projection.cc
index 2d08cffb67..77b7bf943a 100644
--- a/src/projection.cc
+++ b/src/projection.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/render.cc b/src/render.cc
index 5d73575c01..27a9aa5107 100644
--- a/src/render.cc
+++ b/src/render.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/surface.cc b/src/surface.cc
index 2a3b4b5714..b2abbed484 100644
--- a/src/surface.cc
+++ b/src/surface.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/transform.cc b/src/transform.cc
index 3ffc2a677a..27a31ce956 100644
--- a/src/transform.cc
+++ b/src/transform.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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
diff --git a/src/value.cc b/src/value.cc
index 3aae9e55e3..98fbf369a1 100644
--- a/src/value.cc
+++ b/src/value.cc
@@ -7,6 +7,11 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
  *  This program 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