It's now possible to build each module individually (as a DLL).

src/modules/filesystem/physfs/Filesystem.cpp

@@ -32,12 +32,12 @@ namespace physfs
 	Filesystem::Filesystem()
 		: open_count(0), buffer(0)
 	{
-
 	}
 
 	Filesystem::~Filesystem()
 	{
-		PHYSFS_deinit();
+		if(PHYSFS_isInit())
+			PHYSFS_deinit();
 	}
 
 	const char * Filesystem::getName() const
@@ -53,6 +53,9 @@ namespace physfs
 
 	bool Filesystem::setIdentity( const char * ident )
 	{
+		if(PHYSFS_isInit())
+			return false;
+
 		// Check whether save directory is already set.
 		if(!save_identity.empty() || PHYSFS_getWriteDir() != 0)
 			return false;
@@ -83,6 +86,9 @@ namespace physfs
 
 	bool Filesystem::setSource(const char * source)
 	{
+		if(!PHYSFS_isInit())
+			return false;
+
 		// Check whether directory is already set.
 		if(!game_source.empty())
 			return false;
@@ -99,6 +105,9 @@ namespace physfs
 
 	bool Filesystem::setupWriteDirectory()
 	{
+		if(!PHYSFS_isInit())
+			return false;
+
 		// These must all be set.
 		if(save_identity.empty() || save_path_full.empty() || save_path_relative.empty())
 			return false;

src/modules/filesystem/physfs/Filesystem.h

@@ -29,7 +29,6 @@
 // LOVE
 #include <common/Module.h>
 #include <common/config.h>
-#include <common/constants.h>
 #include <filesystem/FileData.h>
 #include "File.h"
 

src/modules/filesystem/physfs/wrap_Filesystem.cpp

@@ -243,6 +243,15 @@ namespace physfs
 		0
 	};
 
+	// List of constants.
+	static const LuaConstant wrap_Filesystem_constants[] = {
+		{ "file_closed", File::CLOSED },
+		{ "file_read", File::READ },
+		{ "file_write", File::WRITE },
+		{ "file_append", File::APPEND },
+		{ 0, 0 }
+	};
+
 	int wrap_Filesystem_open(lua_State * L)
 	{
 		if(instance == 0)
@@ -260,10 +269,14 @@ namespace physfs
 
 		luax_register_gc(L, "love.filesystem", instance);
 
-		return luax_register_module(L, wrap_Filesystem_functions, wrap_Filesystem_types, "filesystem");
+		return luax_register_module(L, wrap_Filesystem_functions, wrap_Filesystem_types, wrap_Filesystem_constants, "filesystem");
 	}
 
 } // physfs
 } // filesystem
 } // love
 
+int luaopen_love_filesystem(lua_State * L)
+{
+	return love::filesystem::physfs::wrap_Filesystem_open(L);
+}

src/modules/filesystem/physfs/wrap_Filesystem.h

@@ -64,4 +64,6 @@ namespace physfs
 } // filesystem
 } // love
 
+extern "C" LOVE_EXPORT int luaopen_love_filesystem(lua_State * L);
+
 #endif // LOVE_FILESYSTEM_PHYSFS_WRAP_FILESYSTEM_H