Windows: use CMake macro to export all symbols; test on one class

Core/HardParticle/FormFactorCylinder.h

@@ -20,7 +20,7 @@
 //! A circular cylinder.
 //! @ingroup hardParticle
 
-class BA_CORE_API_ FormFactorCylinder : public IFormFactorBorn
+class FormFactorCylinder : public IFormFactorBorn
 {
 public:
     FormFactorCylinder(const std::vector<double> P);

cmake/modules/SetUpWindows.cmake

+set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
+
 if(${CMAKE_SIZEOF_VOID_P} EQUAL 8)
   set(BORNAGAIN_ARCHITECTURE win64)
   set(BORNAGAIN_PLATFORM win64)