Added AUDACITY_DLL_API and similar to export more of our classes. This is a tiny adaptation of a patch by Stephen Parry for enabling his Eutychus plug-in. See audacity-devel thread 'Second Exports Patch' of Jan 11th 2014.

src/Tags.h

@@ -50,7 +50,15 @@ class ShuttleGui;
 class TagsEditor;
 class ComboEditor;
 
-WX_DECLARE_STRING_HASH_MAP(wxString, TagMap);
+// We want a macro call like this:
+// WX_DECLARE_USER_EXPORTED_STRING_HASH_MAP(wxString, TagMap, AUDACITY_DLL_API);
+// Which wxWidgets does not supply!
+// So use this undocumented variant:
+WX_DECLARE_STRING_HASH_MAP_WITH_DECL( wxString, TagMap,class AUDACITY_DLL_API );
+// Doing this means we can export class Tags without any worry,
+// as every class it uses, including TagMap, is then exported.
+// It's better than using #pragma warning(disable: 4251)
+// and relying on the relevant parts of class Tags being private.
 
 #define TAG_TITLE     wxT("TITLE")
 #define TAG_ARTIST   wxT("ARTIST")
@@ -62,7 +70,7 @@ WX_DECLARE_STRING_HASH_MAP(wxString, TagMap);
 #define TAG_SOFTWARE wxT("Software")
 #define TAG_COPYRIGHT wxT("Copyright")
 
-class Tags: public XMLTagHandler {
+class AUDACITY_DLL_API Tags: public XMLTagHandler {
 
  public:
    Tags();  // constructor

src/export/Export.cpp

@@ -86,8 +86,8 @@ static void ExportCallback(void *cbdata, int index)
 //----------------------------------------------------------------------------
 #include <wx/arrimpl.cpp>
 
-WX_DEFINE_OBJARRAY(ExportPluginArray);
+WX_DEFINE_USER_EXPORTED_OBJARRAY(ExportPluginArray);
-WX_DEFINE_OBJARRAY(FormatInfoArray);
+WX_DEFINE_USER_EXPORTED_OBJARRAY(FormatInfoArray);
 
 ExportPlugin::ExportPlugin()
 {

src/export/Export.h

@@ -29,7 +29,7 @@ class FileDialog;
 class TimeTrack;
 class Mixer;
 
-class FormatInfo
+class AUDACITY_DLL_API FormatInfo
 {
    public:
       FormatInfo(){};
@@ -43,12 +43,12 @@ class FormatInfo
       bool mCanMetaData;
 };
 
-WX_DECLARE_OBJARRAY(FormatInfo, FormatInfoArray);
+WX_DECLARE_USER_EXPORTED_OBJARRAY(FormatInfo, FormatInfoArray, AUDACITY_DLL_API);
 
 //----------------------------------------------------------------------------
 // ExportPlugin
 //----------------------------------------------------------------------------
-class ExportPlugin
+class AUDACITY_DLL_API ExportPlugin
 {
 public:
 
@@ -129,12 +129,12 @@ private:
    FormatInfoArray mFormatInfos;
 };
 
-WX_DECLARE_OBJARRAY(ExportPlugin *, ExportPluginArray);
+WX_DECLARE_USER_EXPORTED_OBJARRAY(ExportPlugin *, ExportPluginArray, AUDACITY_DLL_API);
 
 //----------------------------------------------------------------------------
 // Exporter
 //----------------------------------------------------------------------------
-class Exporter
+class  AUDACITY_DLL_API Exporter
 {
 public:
 

src/xml/XMLFileReader.h

@@ -14,7 +14,7 @@
 
 #include "XMLTagHandler.h"
 
-class XMLFileReader {
+class AUDACITY_DLL_API XMLFileReader {
  public:
    XMLFileReader();
    virtual ~XMLFileReader();

src/xml/XMLWriter.h

@@ -16,7 +16,7 @@
 ///
 /// XMLWriter
 ///
-class XMLWriter {
+class AUDACITY_DLL_API XMLWriter {
 
  public:
 
@@ -72,7 +72,7 @@ class XMLWriter {
 ///
 /// XMLFileWriter
 ///
-class XMLFileWriter:public wxFFile, public XMLWriter {
+class AUDACITY_DLL_API XMLFileWriter:public wxFFile, public XMLWriter {
 
  public: