diff --git a/CMakeLists.txt b/CMakeLists.txt
index cfff5ae26..411c4b160 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.9)
+cmake_minimum_required(VERSION 3.2.0)
 
 string(COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_BUILD_DIR}" IS_IN_SOURCE_BUILD)
 if(IS_IN_SOURCE_BUILD)
@@ -34,8 +34,10 @@ set(CMAKE_JAVA_TARGET_OUTPUT_DIR ${PROJECT_BINARY_DIR}/jars)
 ######## Set compiler flags ########
 include(UseCXX14)
 include(Coverage)
+include(GenerateExportHeader)
 set(CMAKE_CXX_FLAGS " -Wall ${CMAKE_CXX_FLAGS}")
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Werror=return-type")
+set(CMAKE_CXX_VISIBILITY_PRESET hidden)
 
 # cmake code needed for the coverity scan upload
 include(Coverity)
diff --git a/application/CMakeLists.txt b/application/CMakeLists.txt
index 1ba19bc2f..1cc37a5db 100644
--- a/application/CMakeLists.txt
+++ b/application/CMakeLists.txt
@@ -323,7 +323,7 @@ if(WIN32)
 	set(MultiMC_LINK_ADDITIONAL_LIBS ${MultiMC_LINK_ADDITIONAL_LIBS} Qt5::WinMain)
 endif(WIN32)
 
-include_directories(../logic)
+include_directories(../logic ${CMAKE_CURRENT_BINARY_DIR}/../logic)
 
 # Qt 5 stuff
 qt5_wrap_ui(MULTIMC_UI ${MULTIMC_UIS})
diff --git a/application/MainWindow.cpp b/application/MainWindow.cpp
index 891842b52..b50d01600 100644
--- a/application/MainWindow.cpp
+++ b/application/MainWindow.cpp
@@ -1105,6 +1105,8 @@ void MainWindow::instanceFromZipPack(QString instName, QString instGroup, QStrin
 		errorMsg += tr("Not an instance");
 		CustomMessageBox::selectable(this, tr("Error"), errorMsg, QMessageBox::Warning)->show();
 		return;
+	default:
+		break;
 	}
 
 	newInstance->setName(instName);
diff --git a/application/pages/OtherLogsPage.h b/application/pages/OtherLogsPage.h
index 9a5a6ed45..564b26d21 100644
--- a/application/pages/OtherLogsPage.h
+++ b/application/pages/OtherLogsPage.h
@@ -70,7 +70,7 @@ private:
 private:
 	Ui::OtherLogsPage *ui;
 	QString m_path;
-	RecursiveFileSystemWatcher *m_watcher;
 	QString m_currentFile;
 	IPathMatcher::Ptr m_fileFilter;
+	RecursiveFileSystemWatcher *m_watcher;
 };
diff --git a/logic/BaseInstaller.h b/logic/BaseInstaller.h
index d4f43beb7..dd8040855 100644
--- a/logic/BaseInstaller.h
+++ b/logic/BaseInstaller.h
@@ -17,6 +17,8 @@
 
 #include <memory>
 
+#include "multimc_logic_export.h"
+
 class OneSixInstance;
 class QDir;
 class QString;
@@ -25,7 +27,7 @@ class Task;
 struct BaseVersion;
 typedef std::shared_ptr<BaseVersion> BaseVersionPtr;
 
-class BaseInstaller
+class MULTIMC_LOGIC_EXPORT BaseInstaller
 {
 public:
 	BaseInstaller();
diff --git a/logic/BaseInstance.h b/logic/BaseInstance.h
index 070a98387..7fbd5de56 100644
--- a/logic/BaseInstance.h
+++ b/logic/BaseInstance.h
@@ -28,6 +28,8 @@
 #include "launch/MessageLevel.h"
 #include "pathmatcher/IPathMatcher.h"
 
+#include "multimc_logic_export.h"
+
 class QDir;
 class Task;
 class LaunchTask;
@@ -44,7 +46,7 @@ typedef std::shared_ptr<BaseInstance> InstancePtr;
  * To create a new instance type, create a new class inheriting from this class
  * and implement the pure virtual functions.
  */
-class BaseInstance : public QObject, public std::enable_shared_from_this<BaseInstance>
+class MULTIMC_LOGIC_EXPORT BaseInstance : public QObject, public std::enable_shared_from_this<BaseInstance>
 {
 	Q_OBJECT
 protected:
diff --git a/logic/BaseVersionList.h b/logic/BaseVersionList.h
index ce36e2866..e8d0cca7e 100644
--- a/logic/BaseVersionList.h
+++ b/logic/BaseVersionList.h
@@ -20,8 +20,8 @@
 #include <QAbstractListModel>
 
 #include "BaseVersion.h"
-
-class Task;
+#include "tasks/Task.h"
+#include "multimc_logic_export.h"
 
 /*!
  * \brief Class that each instance type's version list derives from.
@@ -35,7 +35,7 @@ class Task;
  * all have a default implementation, but they can be overridden by plugins to
  * change the behavior of the list.
  */
-class BaseVersionList : public QAbstractListModel
+class MULTIMC_LOGIC_EXPORT BaseVersionList : public QAbstractListModel
 {
 	Q_OBJECT
 public:
diff --git a/logic/CMakeLists.txt b/logic/CMakeLists.txt
index fce89ac8a..1f6b62bfb 100644
--- a/logic/CMakeLists.txt
+++ b/logic/CMakeLists.txt
@@ -308,7 +308,9 @@ if(WIN32)
 endif()
 
 # Add common library
-add_library(MultiMC_logic STATIC ${LOGIC_SOURCES})
+add_library(MultiMC_logic SHARED ${LOGIC_SOURCES})
+
+generate_export_header(MultiMC_logic)
 
 # Use system zlib on unix and Qt ZLIB on Windows
 if(UNIX)
@@ -328,3 +330,5 @@ target_link_libraries(MultiMC_logic xz-embedded unpack200 iconfix libUtil Logica
 		 ${ZLIB_LIBRARIES} ${MultiMC_LINK_ADDITIONAL_LIBS})
 
 add_dependencies(MultiMC_logic QuaZIP)
+
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
diff --git a/logic/Env.h b/logic/Env.h
index a53a62cb7..b81cfa629 100644
--- a/logic/Env.h
+++ b/logic/Env.h
@@ -4,6 +4,8 @@
 #include <QString>
 #include <QMap>
 
+#include "multimc_logic_export.h"
+
 class IconList;
 class QNetworkAccessManager;
 class HttpMetaCache;
@@ -15,7 +17,7 @@ class BaseVersion;
 #endif
 #define ENV (Env::getInstance())
 
-class Env
+class MULTIMC_LOGIC_EXPORT Env
 {
 	friend class MultiMC;
 private:
diff --git a/logic/Exception.h b/logic/Exception.h
index 2664910eb..0dae39a06 100644
--- a/logic/Exception.h
+++ b/logic/Exception.h
@@ -6,7 +6,9 @@
 #include <QLoggingCategory>
 #include <exception>
 
-class Exception : public std::exception
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT Exception : public std::exception
 {
 public:
 	Exception(const QString &message) : std::exception(), m_message(message)
@@ -30,12 +32,3 @@ public:
 private:
 	QString m_message;
 };
-
-#define DECLARE_EXCEPTION(name)                                                                \
-	class name##Exception : public ::Exception                                                 \
-	{                                                                                          \
-	public:                                                                                    \
-		name##Exception(const QString &message) : Exception(message)                           \
-		{                                                                                      \
-		}                                                                                      \
-	}
diff --git a/logic/FileSystem.h b/logic/FileSystem.h
index e70f31656..a66e7ead8 100644
--- a/logic/FileSystem.h
+++ b/logic/FileSystem.h
@@ -4,10 +4,17 @@
 
 #include "Exception.h"
 
+#include "multimc_logic_export.h"
+
 namespace FS
 {
-DECLARE_EXCEPTION(FileSystem);
 
-void write(const QString &filename, const QByteArray &data);
-QByteArray read(const QString &filename);
+class MULTIMC_LOGIC_EXPORT FileSystemException : public ::Exception
+{
+public:
+	FileSystemException(const QString &message) : Exception(message) {}
+};
+
+void MULTIMC_LOGIC_EXPORT write(const QString &filename, const QByteArray &data);
+QByteArray MULTIMC_LOGIC_EXPORT read(const QString &filename);
 }
diff --git a/logic/GZip.h b/logic/GZip.h
index cd9f53d83..7ccf1d385 100644
--- a/logic/GZip.h
+++ b/logic/GZip.h
@@ -1,7 +1,9 @@
 #pragma once
 #include <QByteArray>
 
-class GZip
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT GZip
 {
 public:
 	static bool inflate(const QByteArray &compressedBytes, QByteArray &uncompressedBytes);
diff --git a/logic/InstanceList.h b/logic/InstanceList.h
index 07a71ffb5..1799080a9 100644
--- a/logic/InstanceList.h
+++ b/logic/InstanceList.h
@@ -21,10 +21,12 @@
 
 #include "BaseInstance.h"
 
+#include "multimc_logic_export.h"
+
 class BaseInstance;
 class QDir;
 
-class InstanceList : public QAbstractListModel
+class MULTIMC_LOGIC_EXPORT InstanceList : public QAbstractListModel
 {
 	Q_OBJECT
 private:
diff --git a/logic/Json.h b/logic/Json.h
index 55f0cfc16..f03f777ab 100644
--- a/logic/Json.h
+++ b/logic/Json.h
@@ -16,7 +16,11 @@
 
 namespace Json
 {
-DECLARE_EXCEPTION(Json);
+class MULTIMC_LOGIC_EXPORT JsonException : public ::Exception
+{
+public:
+	JsonException(const QString &message) : Exception(message) {}
+};
 
 /// @throw FileSystemException
 void write(const QJsonDocument &doc, const QString &filename);
diff --git a/logic/MMCStrings.h b/logic/MMCStrings.h
index b2dd3912f..5606b9099 100644
--- a/logic/MMCStrings.h
+++ b/logic/MMCStrings.h
@@ -2,7 +2,9 @@
 
 #include <QString>
 
+#include "multimc_logic_export.h"
+
 namespace Strings
 {
-	int naturalCompare(const QString &s1, const QString &s2, Qt::CaseSensitivity cs);
+	int MULTIMC_LOGIC_EXPORT naturalCompare(const QString &s1, const QString &s2, Qt::CaseSensitivity cs);
 }
diff --git a/logic/MMCZip.h b/logic/MMCZip.h
index 0107d7a66..a31670791 100644
--- a/logic/MMCZip.h
+++ b/logic/MMCZip.h
@@ -7,6 +7,8 @@
 #include "SeparatorPrefixTree.h"
 #include <functional>
 
+#include "multimc_logic_export.h"
+
 class QuaZip;
 
 namespace MMCZip
@@ -19,7 +21,7 @@ namespace MMCZip
 	 * \param recursive Whether to pack sub-directories as well or only files.
 	 * \return true if success, false otherwise.
      */
-	bool compressSubDir(QuaZip *zip, QString dir, QString origDir, QSet<QString> &added,
+	bool MULTIMC_LOGIC_EXPORT compressSubDir(QuaZip *zip, QString dir, QString origDir, QSet<QString> &added,
 					QString prefix = QString(), const SeparatorPrefixTree <'/'> * blacklist = nullptr);
 
 	/**
@@ -29,23 +31,23 @@ namespace MMCZip
 	 * \param recursive Whether to pack the subdirectories as well, or just regular files.
 	 * \return true if success, false otherwise.
 	 */
-	bool compressDir(QString zipFile, QString dir, QString prefix = QString(), const SeparatorPrefixTree <'/'> * blacklist = nullptr);
+	bool MULTIMC_LOGIC_EXPORT compressDir(QString zipFile, QString dir, QString prefix = QString(), const SeparatorPrefixTree <'/'> * blacklist = nullptr);
 
 	/// filter function for @mergeZipFiles - passthrough
-	bool noFilter(QString key);
+	bool MULTIMC_LOGIC_EXPORT noFilter(QString key);
 
 	/// filter function for @mergeZipFiles - ignores METAINF
-	bool metaInfFilter(QString key);
+	bool MULTIMC_LOGIC_EXPORT metaInfFilter(QString key);
 
 	/**
 	 * Merge two zip files, using a filter function
 	 */
-	bool mergeZipFiles(QuaZip *into, QFileInfo from, QSet<QString> &contained, std::function<bool(QString)> filter);
+	bool MULTIMC_LOGIC_EXPORT mergeZipFiles(QuaZip *into, QFileInfo from, QSet<QString> &contained, std::function<bool(QString)> filter);
 
 	/**
 	 * take a source jar, add mods to it, resulting in target jar
 	 */
-	bool createModdedJar(QString sourceJarPath, QString targetJarPath, const QList<Mod>& mods);
+	bool MULTIMC_LOGIC_EXPORT createModdedJar(QString sourceJarPath, QString targetJarPath, const QList<Mod>& mods);
 
 	/**
 	 * Extract a whole archive.
@@ -55,5 +57,5 @@ namespace MMCZip
 	 * left empty.
 	 * \return The list of the full paths of the files extracted, empty on failure.
 	 */
-    QStringList extractDir(QString fileCompressed, QString dir = QString());
+    QStringList MULTIMC_LOGIC_EXPORT extractDir(QString fileCompressed, QString dir = QString());
 }
\ No newline at end of file
diff --git a/logic/RecursiveFileSystemWatcher.h b/logic/RecursiveFileSystemWatcher.h
index a2a9e7e3d..07bce0b90 100644
--- a/logic/RecursiveFileSystemWatcher.h
+++ b/logic/RecursiveFileSystemWatcher.h
@@ -4,7 +4,9 @@
 #include <QDir>
 #include "pathmatcher/IPathMatcher.h"
 
-class RecursiveFileSystemWatcher : public QObject
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT RecursiveFileSystemWatcher : public QObject
 {
 	Q_OBJECT
 public:
diff --git a/logic/auth/AuthSession.h b/logic/auth/AuthSession.h
index 2ac170fab..dede90a9e 100644
--- a/logic/auth/AuthSession.h
+++ b/logic/auth/AuthSession.h
@@ -4,13 +4,15 @@
 #include <QMultiMap>
 #include <memory>
 
+#include "multimc_logic_export.h"
+
 struct User
 {
 	QString id;
 	QMultiMap<QString, QString> properties;
 };
 
-struct AuthSession
+struct MULTIMC_LOGIC_EXPORT AuthSession
 {
 	bool MakeOffline(QString offline_playername);
 
diff --git a/logic/auth/MojangAccount.h b/logic/auth/MojangAccount.h
index 47ebf91b0..5cf8a0f2f 100644
--- a/logic/auth/MojangAccount.h
+++ b/logic/auth/MojangAccount.h
@@ -25,6 +25,9 @@
 #include <memory>
 #include "AuthSession.h"
 
+#include "multimc_logic_export.h"
+MULTIMC_LOGIC_EXPORT
+
 class Task;
 class YggdrasilTask;
 class MojangAccount;
@@ -58,7 +61,7 @@ enum AccountStatus
  * Said information may include things such as that account's username, client token, and access
  * token if the user chose to stay logged in.
  */
-class MojangAccount : public QObject
+class MULTIMC_LOGIC_EXPORT MojangAccount : public QObject
 {
 	Q_OBJECT
 public: /* construction */
diff --git a/logic/auth/MojangAccountList.h b/logic/auth/MojangAccountList.h
index b68343f2f..49b71fabb 100644
--- a/logic/auth/MojangAccountList.h
+++ b/logic/auth/MojangAccountList.h
@@ -22,6 +22,8 @@
 
 #include "auth/MojangAccount.h"
 
+#include "multimc_logic_export.h"
+
 /*!
  * \brief List of available Mojang accounts.
  * This should be loaded in the background by MultiMC on startup.
@@ -31,7 +33,7 @@
  * all have a default implementation, but they can be overridden by subclasses to
  * change the behavior of the list.
  */
-class MojangAccountList : public QAbstractListModel
+class MULTIMC_LOGIC_EXPORT MojangAccountList : public QAbstractListModel
 {
 	Q_OBJECT
 public:
@@ -126,7 +128,7 @@ public:
 	 * If the username given is an empty string, sets the active account to nothing.
 	 */
 	virtual void setActiveAccount(const QString &username);
-	
+
 	/*!
 	 * Returns true if any of the account is at least Validated
 	 */
diff --git a/logic/forge/ForgeInstaller.h b/logic/forge/ForgeInstaller.h
index ae30177f1..0de762b6e 100644
--- a/logic/forge/ForgeInstaller.h
+++ b/logic/forge/ForgeInstaller.h
@@ -20,11 +20,13 @@
 #include <QString>
 #include <memory>
 
+#include "multimc_logic_export.h"
+
 class MinecraftProfile;
 class ForgeInstallTask;
 struct ForgeVersion;
 
-class ForgeInstaller : public BaseInstaller
+class MULTIMC_LOGIC_EXPORT ForgeInstaller : public BaseInstaller
 {
 	friend class ForgeInstallTask;
 public:
diff --git a/logic/forge/ForgeVersionList.h b/logic/forge/ForgeVersionList.h
index 35af32331..e2e8c3f87 100644
--- a/logic/forge/ForgeVersionList.h
+++ b/logic/forge/ForgeVersionList.h
@@ -25,7 +25,9 @@
 #include "net/NetJob.h"
 #include "forge/ForgeVersion.h"
 
-class ForgeVersionList : public BaseVersionList
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT ForgeVersionList : public BaseVersionList
 {
 	Q_OBJECT
 public:
diff --git a/logic/ftb/FTBPlugin.h b/logic/ftb/FTBPlugin.h
index 30913d190..6851d8a52 100644
--- a/logic/ftb/FTBPlugin.h
+++ b/logic/ftb/FTBPlugin.h
@@ -2,8 +2,10 @@
 
 #include <BaseInstance.h>
 
+#include "multimc_logic_export.h"
+
 // Pseudo-plugin for FTB related things. Super derpy!
-class FTBPlugin
+class MULTIMC_LOGIC_EXPORT FTBPlugin
 {
 public:
 	static void initialize(SettingsObjectPtr globalSettings);
diff --git a/logic/icons/IconList.h b/logic/icons/IconList.h
index cc2ba5c43..971db8242 100644
--- a/logic/icons/IconList.h
+++ b/logic/icons/IconList.h
@@ -25,9 +25,11 @@
 #include "settings/Setting.h"
 #include "Env.h" // there is a global icon list inside Env.
 
+#include "multimc_logic_export.h"
+
 class QFileSystemWatcher;
 
-class IconList : public QAbstractListModel
+class MULTIMC_LOGIC_EXPORT IconList : public QAbstractListModel
 {
 	Q_OBJECT
 public:
diff --git a/logic/icons/MMCIcon.h b/logic/icons/MMCIcon.h
index cf087aa45..753e916d0 100644
--- a/logic/icons/MMCIcon.h
+++ b/logic/icons/MMCIcon.h
@@ -17,7 +17,10 @@
 #include <QString>
 #include <QDateTime>
 #include <QIcon>
-struct MMCImage
+
+#include "multimc_logic_export.h"
+
+struct MULTIMC_LOGIC_EXPORT MMCImage
 {
 	QIcon icon;
 	QString filename;
@@ -28,7 +31,7 @@ struct MMCImage
 	}
 };
 
-struct MMCIcon
+struct MULTIMC_LOGIC_EXPORT MMCIcon
 {
 	enum Type : unsigned
 	{
diff --git a/logic/java/JavaChecker.h b/logic/java/JavaChecker.h
index a25eef939..3399f07e8 100644
--- a/logic/java/JavaChecker.h
+++ b/logic/java/JavaChecker.h
@@ -3,6 +3,8 @@
 #include <QTimer>
 #include <memory>
 
+#include "multimc_logic_export.h"
+
 class JavaChecker;
 
 
@@ -20,7 +22,7 @@ struct JavaCheckResult
 
 typedef std::shared_ptr<QProcess> QProcessPtr;
 typedef std::shared_ptr<JavaChecker> JavaCheckerPtr;
-class JavaChecker : public QObject
+class MULTIMC_LOGIC_EXPORT JavaChecker : public QObject
 {
 	Q_OBJECT
 public:
diff --git a/logic/java/JavaUtils.h b/logic/java/JavaUtils.h
index cde3050e9..d4dd2409f 100644
--- a/logic/java/JavaUtils.h
+++ b/logic/java/JavaUtils.h
@@ -27,7 +27,9 @@
 #include <windows.h>
 #endif
 
-class JavaUtils : public QObject
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT JavaUtils : public QObject
 {
 	Q_OBJECT
 public:
diff --git a/logic/java/JavaVersionList.h b/logic/java/JavaVersionList.h
index d78f9e7c2..905a5a7bd 100644
--- a/logic/java/JavaVersionList.h
+++ b/logic/java/JavaVersionList.h
@@ -22,6 +22,8 @@
 #include "tasks/Task.h"
 #include "java/JavaCheckerJob.h"
 
+#include "multimc_logic_export.h"
+
 class JavaListLoadTask;
 
 struct JavaVersion : public BaseVersion
@@ -54,7 +56,7 @@ struct JavaVersion : public BaseVersion
 
 typedef std::shared_ptr<JavaVersion> JavaVersionPtr;
 
-class JavaVersionList : public BaseVersionList
+class MULTIMC_LOGIC_EXPORT JavaVersionList : public BaseVersionList
 {
 	Q_OBJECT
 public:
diff --git a/logic/launch/LaunchTask.h b/logic/launch/LaunchTask.h
index bd0485c8b..eb13a72dd 100644
--- a/logic/launch/LaunchTask.h
+++ b/logic/launch/LaunchTask.h
@@ -22,7 +22,9 @@
 #include "LoggedProcess.h"
 #include "LaunchStep.h"
 
-class LaunchTask: public Task
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT LaunchTask: public Task
 {
 	Q_OBJECT
 protected:
diff --git a/logic/launch/steps/CheckJava.cpp b/logic/launch/steps/CheckJava.cpp
index 92c65d0ac..9c5fd404d 100644
--- a/logic/launch/steps/CheckJava.cpp
+++ b/logic/launch/steps/CheckJava.cpp
@@ -57,7 +57,6 @@ void CheckJava::executeTask()
 	if (javaUnixTime != storedUnixTime)
 	{
 		m_JavaChecker = std::make_shared<JavaChecker>();
-		bool successful = false;
 		QString errorLog;
 		QString version;
 		emit logLine(tr("Checking Java version..."), MessageLevel::MultiMC);
diff --git a/logic/launch/steps/LaunchMinecraft.cpp b/logic/launch/steps/LaunchMinecraft.cpp
index 4cde2d9f8..954380031 100644
--- a/logic/launch/steps/LaunchMinecraft.cpp
+++ b/logic/launch/steps/LaunchMinecraft.cpp
@@ -81,8 +81,8 @@ void LaunchMinecraft::on_state(LoggedProcess::State state)
 		case LoggedProcess::Finished:
 		{
 			m_parent->setPid(-1);
-			auto exitCode = m_process.exitCode();
 			//FIXME: make this work again
+			// auto exitCode = m_process.exitCode();
 			// m_postlaunchprocess.processEnvironment().insert("INST_EXITCODE", QString(exitCode));
 			// run post-exit
 			emitSucceeded();
diff --git a/logic/launch/steps/TextPrint.h b/logic/launch/steps/TextPrint.h
index 3846bf84d..fdd9014a7 100644
--- a/logic/launch/steps/TextPrint.h
+++ b/logic/launch/steps/TextPrint.h
@@ -19,7 +19,13 @@
 #include <launch/LoggedProcess.h>
 #include <java/JavaChecker.h>
 
-class TextPrint: public LaunchStep
+#include "multimc_logic_export.h"
+
+/*
+ * FIXME: maybe do not export
+ */
+
+class MULTIMC_LOGIC_EXPORT TextPrint: public LaunchStep
 {
 	Q_OBJECT
 public:
diff --git a/logic/liteloader/LiteLoaderInstaller.h b/logic/liteloader/LiteLoaderInstaller.h
index 490d2107a..5afa4f6c7 100644
--- a/logic/liteloader/LiteLoaderInstaller.h
+++ b/logic/liteloader/LiteLoaderInstaller.h
@@ -21,7 +21,9 @@
 #include "BaseInstaller.h"
 #include "liteloader/LiteLoaderVersionList.h"
 
-class LiteLoaderInstaller : public BaseInstaller
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT LiteLoaderInstaller : public BaseInstaller
 {
 public:
 	LiteLoaderInstaller();
diff --git a/logic/liteloader/LiteLoaderVersionList.h b/logic/liteloader/LiteLoaderVersionList.h
index f3f783490..e25f2c64b 100644
--- a/logic/liteloader/LiteLoaderVersionList.h
+++ b/logic/liteloader/LiteLoaderVersionList.h
@@ -25,6 +25,8 @@
 #include "net/NetJob.h"
 #include <minecraft/RawLibrary.h>
 
+#include "multimc_logic_export.h"
+
 class LLListLoadTask;
 class QNetworkReply;
 
@@ -65,7 +67,7 @@ public:
 };
 typedef std::shared_ptr<LiteLoaderVersion> LiteLoaderVersionPtr;
 
-class LiteLoaderVersionList : public BaseVersionList
+class MULTIMC_LOGIC_EXPORT LiteLoaderVersionList : public BaseVersionList
 {
 	Q_OBJECT
 public:
diff --git a/logic/minecraft/LegacyInstance.h b/logic/minecraft/LegacyInstance.h
index 0930c2902..8663dabac 100644
--- a/logic/minecraft/LegacyInstance.h
+++ b/logic/minecraft/LegacyInstance.h
@@ -17,10 +17,12 @@
 
 #include "minecraft/MinecraftInstance.h"
 
+#include "multimc_logic_export.h"
+
 class ModList;
 class Task;
 
-class LegacyInstance : public MinecraftInstance
+class MULTIMC_LOGIC_EXPORT LegacyInstance : public MinecraftInstance
 {
 	Q_OBJECT
 public:
diff --git a/logic/minecraft/LwjglVersionList.h b/logic/minecraft/LwjglVersionList.h
index 9584f837b..84abaab1f 100644
--- a/logic/minecraft/LwjglVersionList.h
+++ b/logic/minecraft/LwjglVersionList.h
@@ -24,10 +24,12 @@
 #include "BaseVersion.h"
 #include "BaseVersionList.h"
 
+#include "multimc_logic_export.h"
+
 class LWJGLVersion;
 typedef std::shared_ptr<LWJGLVersion> PtrLWJGLVersion;
 
-class LWJGLVersion : public BaseVersion
+class MULTIMC_LOGIC_EXPORT LWJGLVersion : public BaseVersion
 {
 public:
 	LWJGLVersion(const QString &name, const QString &url)
@@ -60,7 +62,7 @@ protected:
 	QString m_url;
 };
 
-class LWJGLVersionList : public BaseVersionList
+class MULTIMC_LOGIC_EXPORT LWJGLVersionList : public BaseVersionList
 {
 	Q_OBJECT
 public:
diff --git a/logic/minecraft/MinecraftInstance.h b/logic/minecraft/MinecraftInstance.h
index 39a51b9ab..b3af2fe8c 100644
--- a/logic/minecraft/MinecraftInstance.h
+++ b/logic/minecraft/MinecraftInstance.h
@@ -3,9 +3,11 @@
 #include "minecraft/Mod.h"
 #include <QProcess>
 
+#include "multimc_logic_export.h"
+
 class ModList;
 
-class MinecraftInstance: public BaseInstance
+class MULTIMC_LOGIC_EXPORT MinecraftInstance: public BaseInstance
 {
 public:
 	MinecraftInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir);
diff --git a/logic/minecraft/MinecraftProfile.h b/logic/minecraft/MinecraftProfile.h
index d97f7bb8b..6f56e8484 100644
--- a/logic/minecraft/MinecraftProfile.h
+++ b/logic/minecraft/MinecraftProfile.h
@@ -25,10 +25,13 @@
 #include "VersionFile.h"
 #include "JarMod.h"
 
+#include "multimc_logic_export.h"
+
 class ProfileStrategy;
 class OneSixInstance;
 
-class MinecraftProfile : public QAbstractListModel
+
+class MULTIMC_LOGIC_EXPORT MinecraftProfile : public QAbstractListModel
 {
 	Q_OBJECT
 	friend class ProfileStrategy;
diff --git a/logic/minecraft/MinecraftVersion.h b/logic/minecraft/MinecraftVersion.h
index 3795cb41c..234e55662 100644
--- a/logic/minecraft/MinecraftVersion.h
+++ b/logic/minecraft/MinecraftVersion.h
@@ -24,11 +24,13 @@
 #include "VersionFile.h"
 #include "VersionSource.h"
 
+#include "multimc_logic_export.h"
+
 class MinecraftProfile;
 class MinecraftVersion;
 typedef std::shared_ptr<MinecraftVersion> MinecraftVersionPtr;
 
-class MinecraftVersion : public BaseVersion, public ProfilePatch
+class MULTIMC_LOGIC_EXPORT MinecraftVersion : public BaseVersion, public ProfilePatch
 {
 public: /* methods */
 	bool usesLegacyLauncher();
diff --git a/logic/minecraft/MinecraftVersionList.h b/logic/minecraft/MinecraftVersionList.h
index 8e45d35ab..110f8a664 100644
--- a/logic/minecraft/MinecraftVersionList.h
+++ b/logic/minecraft/MinecraftVersionList.h
@@ -24,10 +24,12 @@
 #include "minecraft/MinecraftVersion.h"
 #include <net/NetJob.h>
 
+#include "multimc_logic_export.h"
+
 class MCVListLoadTask;
 class MCVListVersionUpdateTask;
 
-class MinecraftVersionList : public BaseVersionList
+class MULTIMC_LOGIC_EXPORT MinecraftVersionList : public BaseVersionList
 {
 	Q_OBJECT
 private:
diff --git a/logic/minecraft/ModList.h b/logic/minecraft/ModList.h
index 70eb55691..823854ed9 100644
--- a/logic/minecraft/ModList.h
+++ b/logic/minecraft/ModList.h
@@ -22,6 +22,8 @@
 
 #include "minecraft/Mod.h"
 
+#include "multimc_logic_export.h"
+
 class LegacyInstance;
 class BaseInstance;
 class QFileSystemWatcher;
@@ -30,7 +32,7 @@ class QFileSystemWatcher;
  * A legacy mod list.
  * Backed by a folder.
  */
-class ModList : public QAbstractListModel
+class MULTIMC_LOGIC_EXPORT ModList : public QAbstractListModel
 {
 	Q_OBJECT
 public:
diff --git a/logic/minecraft/OneSixInstance.cpp b/logic/minecraft/OneSixInstance.cpp
index 6cea55d2e..57fa0a68e 100644
--- a/logic/minecraft/OneSixInstance.cpp
+++ b/logic/minecraft/OneSixInstance.cpp
@@ -292,7 +292,7 @@ std::shared_ptr<Task> OneSixInstance::createJarModdingTask()
 	class JarModTask : public Task
 	{
 	public:
-		explicit JarModTask(std::shared_ptr<OneSixInstance> inst) : m_inst(inst), Task(nullptr)
+		explicit JarModTask(std::shared_ptr<OneSixInstance> inst) : Task(nullptr), m_inst(inst)
 		{
 		}
 		virtual void executeTask()
diff --git a/logic/minecraft/OneSixInstance.h b/logic/minecraft/OneSixInstance.h
index 429023669..963bd152a 100644
--- a/logic/minecraft/OneSixInstance.h
+++ b/logic/minecraft/OneSixInstance.h
@@ -20,7 +20,9 @@
 #include "minecraft/MinecraftProfile.h"
 #include "minecraft/ModList.h"
 
-class OneSixInstance : public MinecraftInstance
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT OneSixInstance : public MinecraftInstance
 {
 	Q_OBJECT
 public:
diff --git a/logic/minecraft/SkinUtils.h b/logic/minecraft/SkinUtils.h
index bab9d45e2..5584bf6cd 100644
--- a/logic/minecraft/SkinUtils.h
+++ b/logic/minecraft/SkinUtils.h
@@ -17,7 +17,9 @@
 
 #include <QPixmap>
 
+#include "multimc_logic_export.h"
+
 namespace SkinUtils
 {
-QPixmap getFaceFromCache(QString username, int height = 64, int width = 64);
+QPixmap MULTIMC_LOGIC_EXPORT getFaceFromCache(QString username, int height = 64, int width = 64);
 }
diff --git a/logic/minecraft/VersionFilterData.h b/logic/minecraft/VersionFilterData.h
index 339e3891d..98db24840 100644
--- a/logic/minecraft/VersionFilterData.h
+++ b/logic/minecraft/VersionFilterData.h
@@ -4,6 +4,8 @@
 #include <QSet>
 #include <QDateTime>
 
+#include "multimc_logic_export.h"
+
 struct FMLlib
 {
 	QString filename;
@@ -29,4 +31,4 @@ struct VersionFilterData
 	// Currently discouraged java version (anything equal and above will be discouraged)
 	QString discouragedJavaVersion;
 };
-extern VersionFilterData g_VersionFilterData;
+extern VersionFilterData MULTIMC_LOGIC_EXPORT g_VersionFilterData;
diff --git a/logic/net/ByteArrayDownload.h b/logic/net/ByteArrayDownload.h
index a5d8cebe7..e2fc2911d 100644
--- a/logic/net/ByteArrayDownload.h
+++ b/logic/net/ByteArrayDownload.h
@@ -16,8 +16,10 @@
 #pragma once
 #include "NetAction.h"
 
+#include "multimc_logic_export.h"
+
 typedef std::shared_ptr<class ByteArrayDownload> ByteArrayDownloadPtr;
-class ByteArrayDownload : public NetAction
+class MULTIMC_LOGIC_EXPORT ByteArrayDownload : public NetAction
 {
 	Q_OBJECT
 public:
diff --git a/logic/net/CacheDownload.h b/logic/net/CacheDownload.h
index 7f95a69dc..f640b740f 100644
--- a/logic/net/CacheDownload.h
+++ b/logic/net/CacheDownload.h
@@ -20,19 +20,22 @@
 #include <QCryptographicHash>
 #include <QSaveFile>
 
-class INetworkValidator
+#include "multimc_logic_export.h"
+
+/* FIXME: move to its own file(s) */
+class MULTIMC_LOGIC_EXPORT INetworkValidator
 {
 public:
 	virtual ~INetworkValidator() {}
 
 	virtual void validate(const QByteArray &data) = 0;
 };
-class JsonValidator : public INetworkValidator
+class MULTIMC_LOGIC_EXPORT JsonValidator : public INetworkValidator
 {
 public:
 	void validate(const QByteArray &data) override;
 };
-class MD5HashValidator : public INetworkValidator
+class MULTIMC_LOGIC_EXPORT MD5HashValidator : public INetworkValidator
 {
 public:
 	explicit MD5HashValidator(const QByteArray &expected)
@@ -44,7 +47,7 @@ private:
 };
 
 typedef std::shared_ptr<class CacheDownload> CacheDownloadPtr;
-class CacheDownload : public NetAction
+class MULTIMC_LOGIC_EXPORT CacheDownload : public NetAction
 {
 	Q_OBJECT
 private:
diff --git a/logic/net/HttpMetaCache.h b/logic/net/HttpMetaCache.h
index 042f66bf2..fba3fe5a0 100644
--- a/logic/net/HttpMetaCache.h
+++ b/logic/net/HttpMetaCache.h
@@ -19,9 +19,11 @@
 #include <qtimer.h>
 #include <memory>
 
+#include "multimc_logic_export.h"
+
 class HttpMetaCache;
 
-struct MetaEntry
+struct MULTIMC_LOGIC_EXPORT MetaEntry
 {
 	QString base;
 	QString path;
@@ -35,7 +37,7 @@ struct MetaEntry
 
 typedef std::shared_ptr<MetaEntry> MetaEntryPtr;
 
-class HttpMetaCache : public QObject
+class MULTIMC_LOGIC_EXPORT HttpMetaCache : public QObject
 {
 	Q_OBJECT
 public:
diff --git a/logic/net/NetJob.h b/logic/net/NetJob.h
index 9e4656c7d..85a8bf830 100644
--- a/logic/net/NetJob.h
+++ b/logic/net/NetJob.h
@@ -24,10 +24,12 @@
 #include "tasks/Task.h"
 #include "QObjectPtr.h"
 
+#include "multimc_logic_export.h"
+
 class NetJob;
 typedef QObjectPtr<NetJob> NetJobPtr;
 
-class NetJob : public Task
+class MULTIMC_LOGIC_EXPORT NetJob : public Task
 {
 	Q_OBJECT
 public:
diff --git a/logic/net/PasteUpload.h b/logic/net/PasteUpload.h
index e353f4214..11850c716 100644
--- a/logic/net/PasteUpload.h
+++ b/logic/net/PasteUpload.h
@@ -4,7 +4,9 @@
 #include <QNetworkReply>
 #include <memory>
 
-class PasteUpload : public Task
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT PasteUpload : public Task
 {
 	Q_OBJECT
 public:
diff --git a/logic/net/URLConstants.h b/logic/net/URLConstants.h
index 01d1482b6..b04f44ba5 100644
--- a/logic/net/URLConstants.h
+++ b/logic/net/URLConstants.h
@@ -17,6 +17,8 @@
 
 #include <QString>
 
+#include "multimc_logic_export.h"
+
 namespace URLConstants
 {
 extern const QString AWS_DOWNLOAD_BASE;
@@ -26,7 +28,7 @@ extern const QString AWS_DOWNLOAD_INDEXES;
 extern const QString ASSETS_BASE;
 extern const QString RESOURCE_BASE;
 extern const QString LIBRARY_BASE;
-extern const QString SKINS_BASE;
+MULTIMC_LOGIC_EXPORT extern const QString SKINS_BASE;
 extern const QString AUTH_BASE;
 extern const QString FORGE_LEGACY_URL;
 extern const QString FORGE_GRADLE_URL;
diff --git a/logic/news/NewsChecker.h b/logic/news/NewsChecker.h
index effa80bf5..b8b90728d 100644
--- a/logic/news/NewsChecker.h
+++ b/logic/news/NewsChecker.h
@@ -23,7 +23,9 @@
 
 #include "NewsEntry.h"
 
-class NewsChecker : public QObject
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT NewsChecker : public QObject
 {
 	Q_OBJECT
 public:
diff --git a/logic/notifications/NotificationChecker.h b/logic/notifications/NotificationChecker.h
index 92bc23dc1..a2d92ab90 100644
--- a/logic/notifications/NotificationChecker.h
+++ b/logic/notifications/NotificationChecker.h
@@ -5,7 +5,9 @@
 #include "net/NetJob.h"
 #include "net/CacheDownload.h"
 
-class NotificationChecker : public QObject
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT NotificationChecker : public QObject
 {
 	Q_OBJECT
 
diff --git a/logic/resources/IconResourceHandler.h b/logic/resources/IconResourceHandler.h
index 6f933ad4b..44fafc078 100644
--- a/logic/resources/IconResourceHandler.h
+++ b/logic/resources/IconResourceHandler.h
@@ -4,7 +4,9 @@
 
 #include "ResourceHandler.h"
 
-class IconResourceHandler : public ResourceHandler
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT IconResourceHandler : public ResourceHandler
 {
 public:
 	explicit IconResourceHandler(const QString &key);
diff --git a/logic/resources/Resource.h b/logic/resources/Resource.h
index 40a6d8717..63e97b889 100644
--- a/logic/resources/Resource.h
+++ b/logic/resources/Resource.h
@@ -9,6 +9,8 @@
 #include "ResourceObserver.h"
 #include "TypeMagic.h"
 
+#include "multimc_logic_export.h"
+
 class ResourceHandler;
 
 /** Frontend class for resources
@@ -27,7 +29,7 @@ class ResourceHandler;
  *
  *	@note Always pass resource around using Resource::Ptr! Copy and move constructors are disabled for a reason.
  */
-class Resource : public std::enable_shared_from_this<Resource>
+class MULTIMC_LOGIC_EXPORT Resource : public std::enable_shared_from_this<Resource>
 {
 	// only allow creation from Resource::create and disallow passing around non-pointers
 	explicit Resource(const QString &resource);
diff --git a/logic/resources/ResourceHandler.h b/logic/resources/ResourceHandler.h
index a4f638ec9..f09d89048 100644
--- a/logic/resources/ResourceHandler.h
+++ b/logic/resources/ResourceHandler.h
@@ -3,6 +3,8 @@
 #include <QVariant>
 #include <memory>
 
+#include "multimc_logic_export.h"
+
 class Resource;
 
 /** Base class for things that can retrieve a resource.
@@ -11,7 +13,7 @@ class Resource;
  * call Resource::registerHandler<MyResourceHandler>("<id>"), where <id> is the
  * prefix of the resource ("web", "icon", etc.)
  */
-class ResourceHandler
+class MULTIMC_LOGIC_EXPORT ResourceHandler
 {
 public:
 	virtual ~ResourceHandler() {}
diff --git a/logic/resources/ResourceObserver.h b/logic/resources/ResourceObserver.h
index ef946c326..cf4fa619c 100644
--- a/logic/resources/ResourceObserver.h
+++ b/logic/resources/ResourceObserver.h
@@ -5,12 +5,13 @@
 
 #include <QObject>
 #include <QMetaProperty>
+#include "multimc_logic_export.h"
 
 class QVariant;
 class Resource;
 
 /// Base class for things that can use a resource
-class ResourceObserver
+class MULTIMC_LOGIC_EXPORT ResourceObserver
 {
 public:
 	virtual ~ResourceObserver();
@@ -39,7 +40,7 @@ private:
  *
  * If no name is given an attempt to find a default property for some common classes is done.
  */
-class QObjectResourceObserver : public QObject, public ResourceObserver
+class MULTIMC_LOGIC_EXPORT QObjectResourceObserver : public QObject, public ResourceObserver
 {
 public:
 	explicit QObjectResourceObserver(QObject *target, const char *property = nullptr);
@@ -57,7 +58,7 @@ private:
  *   * We need Func in order to std::forward the function
  */
 template <typename Ret, typename Arg, typename Func>
-class FunctionResourceObserver : public ResourceObserver
+class MULTIMC_LOGIC_EXPORT FunctionResourceObserver : public ResourceObserver
 {
 	std::function<Ret(Arg)> m_function;
 public:
diff --git a/logic/screenshots/ImgurAlbumCreation.h b/logic/screenshots/ImgurAlbumCreation.h
index f4adf6f24..469174e47 100644
--- a/logic/screenshots/ImgurAlbumCreation.h
+++ b/logic/screenshots/ImgurAlbumCreation.h
@@ -2,8 +2,10 @@
 #include "net/NetAction.h"
 #include "Screenshot.h"
 
+#include "multimc_logic_export.h"
+
 typedef std::shared_ptr<class ImgurAlbumCreation> ImgurAlbumCreationPtr;
-class ImgurAlbumCreation : public NetAction
+class MULTIMC_LOGIC_EXPORT ImgurAlbumCreation : public NetAction
 {
 public:
 	explicit ImgurAlbumCreation(QList<ScreenshotPtr> screenshots);
diff --git a/logic/screenshots/ImgurUpload.h b/logic/screenshots/ImgurUpload.h
index f6f4c3a16..0a766b8f2 100644
--- a/logic/screenshots/ImgurUpload.h
+++ b/logic/screenshots/ImgurUpload.h
@@ -2,8 +2,10 @@
 #include "net/NetAction.h"
 #include "Screenshot.h"
 
+#include "multimc_logic_export.h"
+
 typedef std::shared_ptr<class ImgurUpload> ImgurUploadPtr;
-class ImgurUpload : public NetAction
+class MULTIMC_LOGIC_EXPORT ImgurUpload : public NetAction
 {
 public:
 	explicit ImgurUpload(ScreenshotPtr shot);
diff --git a/logic/settings/INIFile.h b/logic/settings/INIFile.h
index f32c55918..5013eb2df 100644
--- a/logic/settings/INIFile.h
+++ b/logic/settings/INIFile.h
@@ -19,8 +19,10 @@
 #include <QVariant>
 #include <QIODevice>
 
+#include "multimc_logic_export.h"
+
 // Sectionless INI parser (for instance config files)
-class INIFile : public QMap<QString, QVariant>
+class MULTIMC_LOGIC_EXPORT INIFile : public QMap<QString, QVariant>
 {
 public:
 	explicit INIFile();
diff --git a/logic/settings/INISettingsObject.h b/logic/settings/INISettingsObject.h
index a93eea786..426b62f50 100644
--- a/logic/settings/INISettingsObject.h
+++ b/logic/settings/INISettingsObject.h
@@ -21,10 +21,12 @@
 
 #include "settings/SettingsObject.h"
 
+#include "multimc_logic_export.h"
+
 /*!
  * \brief A settings object that stores its settings in an INIFile.
  */
-class INISettingsObject : public SettingsObject
+class MULTIMC_LOGIC_EXPORT INISettingsObject : public SettingsObject
 {
 	Q_OBJECT
 public:
diff --git a/logic/settings/Setting.h b/logic/settings/Setting.h
index fd8147950..6d53ac6d0 100644
--- a/logic/settings/Setting.h
+++ b/logic/settings/Setting.h
@@ -20,21 +20,23 @@
 #include <QStringList>
 #include <memory>
 
+#include "multimc_logic_export.h"
+
 class SettingsObject;
 
 /*!
  *
  */
-class Setting : public QObject
+class MULTIMC_LOGIC_EXPORT Setting : public QObject
 {
 	Q_OBJECT
 public:
 	/**
 	 * Construct a Setting
-	 * 
+	 *
 	 * Synonyms are all the possible names used in the settings object, in order of preference.
 	 * First synonym is the ID, which identifies the setting in MultiMC.
-	 * 
+	 *
 	 * defVal is the default value that will be returned when the settings object
 	 * doesn't have any value for this setting.
 	 */
diff --git a/logic/settings/SettingsObject.h b/logic/settings/SettingsObject.h
index 0f299c5d2..821939030 100644
--- a/logic/settings/SettingsObject.h
+++ b/logic/settings/SettingsObject.h
@@ -21,6 +21,8 @@
 #include <QVariant>
 #include <memory>
 
+#include "multimc_logic_export.h"
+
 class Setting;
 class SettingsObject;
 
@@ -38,7 +40,7 @@ typedef std::shared_ptr<SettingsObject> SettingsObjectPtr;
  *
  * \sa Setting
  */
-class SettingsObject : public QObject
+class MULTIMC_LOGIC_EXPORT SettingsObject : public QObject
 {
 	Q_OBJECT
 public:
diff --git a/logic/status/StatusChecker.h b/logic/status/StatusChecker.h
index 28283eb31..c1a54dbac 100644
--- a/logic/status/StatusChecker.h
+++ b/logic/status/StatusChecker.h
@@ -21,7 +21,9 @@
 
 #include <net/NetJob.h>
 
-class StatusChecker : public QObject
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT StatusChecker : public QObject
 {
 	Q_OBJECT
 public:
diff --git a/logic/tasks/SequentialTask.h b/logic/tasks/SequentialTask.h
index 1c90765ce..69031095e 100644
--- a/logic/tasks/SequentialTask.h
+++ b/logic/tasks/SequentialTask.h
@@ -5,7 +5,9 @@
 #include <QQueue>
 #include <memory>
 
-class SequentialTask : public Task
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT SequentialTask : public Task
 {
 	Q_OBJECT
 public:
diff --git a/logic/tasks/Task.h b/logic/tasks/Task.h
index 04899c69b..2b0ccbcdd 100644
--- a/logic/tasks/Task.h
+++ b/logic/tasks/Task.h
@@ -18,7 +18,9 @@
 #include <QObject>
 #include <QString>
 
-class Task : public QObject
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT Task : public QObject
 {
 	Q_OBJECT
 public:
diff --git a/logic/tools/BaseExternalTool.h b/logic/tools/BaseExternalTool.h
index be23036d7..fe1b5dc65 100644
--- a/logic/tools/BaseExternalTool.h
+++ b/logic/tools/BaseExternalTool.h
@@ -3,11 +3,13 @@
 #include <QObject>
 #include <BaseInstance.h>
 
+#include "multimc_logic_export.h"
+
 class BaseInstance;
 class SettingsObject;
 class QProcess;
 
-class BaseExternalTool : public QObject
+class MULTIMC_LOGIC_EXPORT BaseExternalTool : public QObject
 {
 	Q_OBJECT
 public:
@@ -19,7 +21,7 @@ protected:
 	SettingsObjectPtr globalSettings;
 };
 
-class BaseDetachedTool : public BaseExternalTool
+class MULTIMC_LOGIC_EXPORT BaseDetachedTool : public BaseExternalTool
 {
 	Q_OBJECT
 public:
@@ -33,7 +35,7 @@ protected:
 	virtual void runImpl() = 0;
 };
 
-class BaseExternalToolFactory
+class MULTIMC_LOGIC_EXPORT BaseExternalToolFactory
 {
 public:
 	virtual ~BaseExternalToolFactory();
@@ -51,7 +53,7 @@ protected:
 	SettingsObjectPtr globalSettings;
 };
 
-class BaseDetachedToolFactory : public BaseExternalToolFactory
+class MULTIMC_LOGIC_EXPORT BaseDetachedToolFactory : public BaseExternalToolFactory
 {
 public:
 	virtual BaseDetachedTool *createDetachedTool(InstancePtr instance, QObject *parent = 0);
diff --git a/logic/tools/BaseProfiler.h b/logic/tools/BaseProfiler.h
index 5191f7b89..3340b7e4a 100644
--- a/logic/tools/BaseProfiler.h
+++ b/logic/tools/BaseProfiler.h
@@ -2,12 +2,14 @@
 
 #include "BaseExternalTool.h"
 
+#include "multimc_logic_export.h"
+
 class BaseInstance;
 class SettingsObject;
 class LaunchTask;
 class QProcess;
 
-class BaseProfiler : public BaseExternalTool
+class MULTIMC_LOGIC_EXPORT BaseProfiler : public BaseExternalTool
 {
 	Q_OBJECT
 public:
@@ -29,7 +31,7 @@ signals:
 	void abortLaunch(const QString &message);
 };
 
-class BaseProfilerFactory : public BaseExternalToolFactory
+class MULTIMC_LOGIC_EXPORT BaseProfilerFactory : public BaseExternalToolFactory
 {
 public:
 	virtual BaseProfiler *createProfiler(InstancePtr instance, QObject *parent = 0);
diff --git a/logic/tools/JProfiler.h b/logic/tools/JProfiler.h
index b5440b0b4..d658d6c22 100644
--- a/logic/tools/JProfiler.h
+++ b/logic/tools/JProfiler.h
@@ -2,7 +2,9 @@
 
 #include "BaseProfiler.h"
 
-class JProfilerFactory : public BaseProfilerFactory
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT JProfilerFactory : public BaseProfilerFactory
 {
 public:
 	QString name() const override { return "JProfiler"; }
diff --git a/logic/tools/JVisualVM.h b/logic/tools/JVisualVM.h
index 45de2618a..0674da136 100644
--- a/logic/tools/JVisualVM.h
+++ b/logic/tools/JVisualVM.h
@@ -2,7 +2,9 @@
 
 #include "BaseProfiler.h"
 
-class JVisualVMFactory : public BaseProfilerFactory
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT JVisualVMFactory : public BaseProfilerFactory
 {
 public:
 	QString name() const override { return "JVisualVM"; }
diff --git a/logic/tools/MCEditTool.h b/logic/tools/MCEditTool.h
index bd40f02dc..c287f1ea0 100644
--- a/logic/tools/MCEditTool.h
+++ b/logic/tools/MCEditTool.h
@@ -2,7 +2,9 @@
 
 #include "BaseExternalTool.h"
 
-class MCEditTool : public BaseDetachedTool
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT MCEditTool : public BaseDetachedTool
 {
 	Q_OBJECT
 public:
@@ -13,7 +15,7 @@ protected:
 	void runImpl() override;
 };
 
-class MCEditFactory : public BaseDetachedToolFactory
+class MULTIMC_LOGIC_EXPORT MCEditFactory : public BaseDetachedToolFactory
 {
 public:
 	QString name() const override { return "MCEdit"; }
diff --git a/logic/trans/TranslationDownloader.h b/logic/trans/TranslationDownloader.h
index 78e7fe1cd..e7893805c 100644
--- a/logic/trans/TranslationDownloader.h
+++ b/logic/trans/TranslationDownloader.h
@@ -5,11 +5,12 @@
 #include <memory>
 #include <QObject>
 #include <net/NetJob.h>
+#include "multimc_logic_export.h"
 
 class ByteArrayDownload;
 class NetJob;
 
-class TranslationDownloader : public QObject
+class MULTIMC_LOGIC_EXPORT TranslationDownloader : public QObject
 {
 	Q_OBJECT
 
diff --git a/logic/updater/DownloadTask.h b/logic/updater/DownloadTask.h
index d77c2b2c5..83b4a1426 100644
--- a/logic/updater/DownloadTask.h
+++ b/logic/updater/DownloadTask.h
@@ -19,13 +19,15 @@
 #include "net/NetJob.h"
 #include "GoUpdate.h"
 
+#include "multimc_logic_export.h"
+
 namespace GoUpdate
 {
 /*!
  * The DownloadTask is a task that takes a given version ID and repository URL,
  * downloads that version's files from the repository, and prepares to install them.
  */
-class DownloadTask : public Task
+class MULTIMC_LOGIC_EXPORT DownloadTask : public Task
 {
 	Q_OBJECT
 
diff --git a/logic/updater/GoUpdate.h b/logic/updater/GoUpdate.h
index 479f1eebb..b8a534dec 100644
--- a/logic/updater/GoUpdate.h
+++ b/logic/updater/GoUpdate.h
@@ -2,13 +2,15 @@
 #include <QByteArray>
 #include <net/NetJob.h>
 
+#include "multimc_logic_export.h"
+
 namespace GoUpdate
 {
 
 /**
  * A temporary object exchanged between updated checker and the actual update task
  */
-struct Status
+struct MULTIMC_LOGIC_EXPORT Status
 {
 	bool updateAvailable = false;
 
@@ -25,7 +27,7 @@ struct Status
 /**
  * Struct that describes an entry in a VersionFileEntry's `Sources` list.
  */
-struct FileSource
+struct MULTIMC_LOGIC_EXPORT FileSource
 {
 	FileSource(QString type, QString url, QString compression="")
 	{
@@ -48,7 +50,7 @@ typedef QList<FileSource> FileSourceList;
 /**
  * Structure that describes an entry in a GoUpdate version's `Files` list.
  */
-struct VersionFileEntry
+struct MULTIMC_LOGIC_EXPORT VersionFileEntry
 {
 	QString path;
 	int mode;
@@ -64,7 +66,7 @@ typedef QList<VersionFileEntry> VersionFileList;
 /**
  * Structure that describes an operation to perform when installing updates.
  */
-struct Operation
+struct MULTIMC_LOGIC_EXPORT Operation
 {
 	static Operation CopyOp(QString fsource, QString fdest, int fmode=0644)
 	{
@@ -102,13 +104,13 @@ typedef QList<Operation> OperationList;
 /**
  * Loads the file list from the given version info JSON object into the given list.
  */
-bool parseVersionInfo(const QByteArray &data, VersionFileList& list, QString &error);
+bool MULTIMC_LOGIC_EXPORT parseVersionInfo(const QByteArray &data, VersionFileList& list, QString &error);
 
 /*!
  * Takes a list of file entries for the current version's files and the new version's files
  * and populates the downloadList and operationList with information about how to download and install the update.
  */
-bool processFileLists
+bool MULTIMC_LOGIC_EXPORT processFileLists
 (
 	const VersionFileList &currentVersion,
 	const VersionFileList &newVersion,
@@ -125,7 +127,7 @@ bool processFileLists
  *
  * @return false if the path couldn't be fixed (is invalid)
  */
-bool fixPathForOSX(QString &path);
+bool MULTIMC_LOGIC_EXPORT fixPathForOSX(QString &path);
 
 }
 Q_DECLARE_METATYPE(GoUpdate::Status);
\ No newline at end of file
diff --git a/logic/updater/UpdateChecker.h b/logic/updater/UpdateChecker.h
index 39ccd1385..c7fad10e3 100644
--- a/logic/updater/UpdateChecker.h
+++ b/logic/updater/UpdateChecker.h
@@ -20,7 +20,9 @@
 
 #include <QUrl>
 
-class UpdateChecker : public QObject
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT UpdateChecker : public QObject
 {
 	Q_OBJECT
 
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 238accf9d..d6487a654 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,7 +1,7 @@
 # run the unit tests with `make test`
 find_package(Qt5 COMPONENTS Test Core Network)
 
-include_directories(../logic)
+include_directories(../logic ${CMAKE_CURRENT_BINARY_DIR}/../logic)
 include_directories(../depends/util/include/)
 
 unset(MultiMC_TESTS)