Export csparse and cholmod wrapper

Relates #875

g2o/solvers/cholmod/cholmod_wrapper.h

@@ -30,10 +30,12 @@
 #include <cstddef>
 #include <memory>
 
+#include "g2o_cholmod_api.h"
+
 namespace g2o {
 namespace cholmod {
 
-class Cholmod {
+class G2O_SOLVER_CHOLMOD_API Cholmod {
  public:
   Cholmod();
   ~Cholmod();

g2o/solvers/cholmod/g2o_cholmod_api.h

@@ -0,0 +1,49 @@
+// g2o - General Graph Optimization
+// Copyright (C) 2011 R. Kuemmerle, G. Grisetti, H. Strasdat, W. Burgard
+// 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.
+//
+// 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
+// HOLDER 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 G2O_SOLVER_CHOLMOD_API_H
+#define G2O_SOLVER_CHOLMOD_API_H
+
+#include "g2o/config.h"
+
+#ifdef _MSC_VER
+// We are using a Microsoft compiler:
+#ifdef G2O_SHARED_LIBS
+#ifdef solver_cholmod_EXPORTS
+#define G2O_SOLVER_CHOLMOD_API __declspec(dllexport)
+#else
+#define G2O_SOLVER_CHOLMOD_API __declspec(dllimport)
+#endif
+#else
+#define G2O_SOLVER_CHOLMOD_API
+#endif
+
+#else
+// Not Microsoft compiler so set empty definition:
+#define G2O_SOLVER_CHOLMOD_API
+#endif
+
+#endif  // G2O_CSPARSE_API_H

g2o/solvers/csparse/csparse_wrapper.h

@@ -27,15 +27,15 @@
 #ifndef G2O_CSPARSE_WRAPPER_H
 #define G2O_CSPARSE_WRAPPER_H
 
-#include <cstddef>
 #include <memory>
 
 #include "g2o/core/eigen_types.h"
+#include "g2o_csparse_api.h"
 
 namespace g2o {
 namespace csparse {
 
-class CSparse {
+class G2O_SOLVER_CSPARSE_API CSparse {
  public:
   CSparse();
   ~CSparse();