diff --git a/CMakeLists.txt b/CMakeLists.txt
index 50d6e31..1a237b9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,13 @@ file(GLOB HEADERS poly2tri/*.h poly2tri/common/*.h poly2tri/sweep/*.h)
 add_library(poly2tri ${SOURCES} ${HEADERS})
 target_include_directories(poly2tri INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
 
+get_target_property(poly2tri_target_type poly2tri TYPE)
+if(poly2tri_target_type STREQUAL SHARED_LIBRARY)
+  target_compile_definitions(poly2tri PRIVATE P2T_SHARED_EXPORTS)
+else()
+  target_compile_definitions(poly2tri PUBLIC P2T_STATIC_EXPORTS)
+endif()
+
 if(P2T_BUILD_TESTS)
     enable_testing()
     add_subdirectory(unittest)
diff --git a/poly2tri/common/dll_symbol.h b/poly2tri/common/dll_symbol.h
new file mode 100644
index 0000000..92c50cb
--- /dev/null
+++ b/poly2tri/common/dll_symbol.h
@@ -0,0 +1,56 @@
+/*
+ * Poly2Tri Copyright (c) 2009-2022, Poly2Tri Contributors
+ * https://github.com/jhasse/poly2tri
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * * Neither the name of Poly2Tri nor the names of its contributors may be
+ *   used to endorse or promote products derived from this software without specific
+ *   prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef DLL_SYMBOL_H
+#define DLL_SYMBOL_H
+
+#if defined(_WIN32)
+#  define P2T_COMPILER_DLLEXPORT __declspec(dllexport)
+#  define P2T_COMPILER_DLLIMPORT __declspec(dllimport)
+#elif defined(__GNUC__)
+#  define P2T_COMPILER_DLLEXPORT __attribute__ ((visibility ("default")))
+#  define P2T_COMPILER_DLLIMPORT __attribute__ ((visibility ("default")))
+#else
+#  define P2T_COMPILER_DLLEXPORT
+#  define P2T_COMPILER_DLLIMPORT
+#endif
+
+#ifndef P2T_DLL_SYMBOL
+#  if defined(P2T_STATIC_EXPORTS)
+#    define P2T_DLL_SYMBOL
+#  elif defined(P2T_SHARED_EXPORTS)
+#    define P2T_DLL_SYMBOL P2T_COMPILER_DLLEXPORT
+#  else
+#    define P2T_DLL_SYMBOL P2T_COMPILER_DLLIMPORT
+#  endif
+#endif
+
+#endif
diff --git a/poly2tri/common/shapes.h b/poly2tri/common/shapes.h
index 5bf8c8f..489558d 100644
--- a/poly2tri/common/shapes.h
+++ b/poly2tri/common/shapes.h
@@ -33,6 +33,8 @@
 #ifndef SHAPES_H
 #define SHAPES_H
 
+#include "dll_symbol.h"
+
 #include <cmath>
 #include <cstddef>
 #include <stdexcept>
@@ -42,7 +44,7 @@ namespace p2t {
 
 struct Edge;
 
-struct Point {
+struct P2T_DLL_SYMBOL Point {
 
   double x, y;
 
@@ -119,10 +121,10 @@ struct Point {
 
 };
 
-std::ostream& operator<<(std::ostream&, const Point&);
+P2T_DLL_SYMBOL std::ostream& operator<<(std::ostream&, const Point&);
 
 // Represents a simple polygon's edge
-struct Edge {
+struct P2T_DLL_SYMBOL Edge {
 
   Point* p, *q;
 
@@ -149,7 +151,7 @@ struct Edge {
 // Triangle-based data structures are know to have better performance than quad-edge structures
 // See: J. Shewchuk, "Triangle: Engineering a 2D Quality Mesh Generator and Delaunay Triangulator"
 //      "Triangulations in CGAL"
-class Triangle {
+class P2T_DLL_SYMBOL Triangle {
 public:
 
 /// Constructor
@@ -324,7 +326,7 @@ inline void Triangle::IsInterior(bool b)
 }
 
 /// Is this set a valid delaunay triangulation?
-bool IsDelaunay(const std::vector<p2t::Triangle*>&);
+P2T_DLL_SYMBOL bool IsDelaunay(const std::vector<p2t::Triangle*>&);
 
 }
 
diff --git a/poly2tri/sweep/cdt.h b/poly2tri/sweep/cdt.h
index efeeda3..7e3a45a 100644
--- a/poly2tri/sweep/cdt.h
+++ b/poly2tri/sweep/cdt.h
@@ -36,6 +36,8 @@
 #include "sweep_context.h"
 #include "sweep.h"
 
+#include "../common/dll_symbol.h"
+
 /**
  *
  * @author Mason Green <mason.green@gmail.com>
@@ -44,7 +46,7 @@
 
 namespace p2t {
 
-class CDT
+class P2T_DLL_SYMBOL CDT
 {
 public: