CMake: Build lmms shared library instead of object library

Resolves some inexplicable linking errors on Windows. Saves us from
working around incomplete CMake support of object libraries.

include/AutomationTrack.h

@@ -30,7 +30,7 @@
 #include "Track.h"
 
 
-class AutomationTrack : public Track
+class LMMS_EXPORT AutomationTrack : public Track
 {
 	Q_OBJECT
 public:

include/BBTrack.h

@@ -31,13 +31,14 @@
 #include <QtCore/QMap>
 #include <QStaticText>
 
+#include "lmms_export.h"
 #include "Track.h"
 
 class TrackLabelButton;
 class TrackContainer;
 
 
-class BBTCO : public TrackContentObject
+class LMMS_EXPORT BBTCO : public TrackContentObject
 {
 public:
 	BBTCO( Track * _track );

include/MainApplication.h

@@ -25,6 +25,7 @@
 #ifndef MAINAPPLICATION_H
 #define MAINAPPLICATION_H
 
+#include "lmms_export.h"
 #include "lmmsconfig.h"
 
 #include <QApplication>
@@ -35,7 +36,7 @@
 #endif
 
 #if defined(LMMS_BUILD_WIN32)
-class MainApplication : public QApplication, public QAbstractNativeEventFilter
+class LMMS_EXPORT MainApplication : public QApplication, public QAbstractNativeEventFilter
 #else
 class MainApplication : public QApplication
 #endif

include/MainWindow.h

@@ -25,6 +25,8 @@
 #ifndef MAIN_WINDOW_H
 #define MAIN_WINDOW_H
 
+#include "lmms_export.h"
+
 #include <QtCore/QBasicTimer>
 #include <QtCore/QTimer>
 #include <QtCore/QList>
@@ -43,7 +45,7 @@ class PluginView;
 class ToolButton;
 
 
-class MainWindow : public QMainWindow
+class LMMS_EXPORT MainWindow : public QMainWindow
 {
 	Q_OBJECT
 public:
@@ -61,7 +63,7 @@ public:
 	void addSpacingToToolBar( int _size );
 
 	// wrap the widget with a window decoration and add it to the workspace
-	LMMS_EXPORT SubWindow* addWindowedWidget(QWidget *w, Qt::WindowFlags windowFlags=0);
+	SubWindow* addWindowedWidget(QWidget *w, Qt::WindowFlags windowFlags=0);
 
 
 	///

include/Memory.h

@@ -54,7 +54,7 @@ static MemoryManager::MmCounter _mm_counter;
 static thread_local MemoryManager::MmCounter _mm_thread_counter;
 
 template<typename T>
-class MmAllocator
+class LMMS_EXPORT MmAllocator
 {
 public:
 	MmAllocator() = default;

include/MemoryPool.h

@@ -14,10 +14,11 @@
 
 #include <cstddef>
 #include <memory>
+#include "lmms_export.h"
 
-class _MemoryPool_Private;
+class LMMS_EXPORT _MemoryPool_Private;
 
-class _MemoryPool_Base
+class LMMS_EXPORT _MemoryPool_Base
 {
 public:
 	_MemoryPool_Base(size_t size, size_t nmemb);

include/MixHelpers.h

@@ -26,6 +26,7 @@
 #define MIX_HELPERS_H
 
 #include "lmms_basics.h"
+#include "lmms_export.h"
 
 class ValueBuffer;
 namespace MixHelpers
@@ -35,7 +36,7 @@ bool isSilent( const sampleFrame* src, int frames );
 
 bool useNaNHandler();
 
-void setNaNHandler( bool use );
+LMMS_EXPORT void setNaNHandler( bool use );
 
 void clear(sampleFrame * src, int frames);
 #ifndef LMMS_DISABLE_SURROUND

include/MixerProfiler.h

@@ -27,10 +27,11 @@
 
 #include <QFile>
 
+#include "lmms_export.h"
 #include "lmms_basics.h"
 #include "MicroTimer.h"
 
-class MixerProfiler
+class LMMS_EXPORT MixerProfiler
 {
 public:
 	MixerProfiler();

include/ModelVisitor.h

@@ -25,6 +25,8 @@
 #ifndef MODELVISITOR_H
 #define MODELVISITOR_H
 
+#include "lmms_export.h"
+
 class AutomatableModel;
 class BoolModel;
 class IntModel;
@@ -32,7 +34,7 @@ class FloatModel;
 class ComboBoxModel;
 class TempoSyncKnobModel;
 
-class ModelVisitor
+class LMMS_EXPORT ModelVisitor
 {
 	template<class ParentType = AutomatableModel, class ModelType>
 	void up(ModelType& m) { visit(static_cast<ParentType&>(m)); }
@@ -46,7 +48,7 @@ public:
 	virtual ~ModelVisitor();
 };
 
-class ConstModelVisitor
+class LMMS_EXPORT ConstModelVisitor
 {
 	template<class ParentType = AutomatableModel, class ModelType>
 	void up(const ModelType& m) {

include/ProjectVersion.h

@@ -28,12 +28,13 @@
 #define PROJECT_VERSION_H
 
 #include <QtCore/QString>
+#include "lmms_export.h"
 
 /*! \brief Version number parsing and comparison
  *
  *  Parses and compares version information.  i.e. "1.0.3" < "1.0.10"
  */
-class ProjectVersion
+class LMMS_EXPORT ProjectVersion
 {
 public:
 	enum CompareType { Major, Minor, Release, Stage, Build };

include/RenderManager.h

@@ -32,7 +32,7 @@
 #include "OutputSettings.h"
 
 
-class RenderManager : public QObject
+class LMMS_EXPORT RenderManager : public QObject
 {
 	Q_OBJECT
 public: