X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fpbd%2Fpbd%2Fabstract_ui.h;h=a8602c7d7877663b00081e04d03c5321a8f3aadc;hb=e057b873b52708326fb654d9bcbbf84b932c4b02;hp=905074c474bba983547f076619ff3fb5543e0efc;hpb=0da34e65e3470b1c2298ddf571df6356d0d42bd8;p=ardour.git

diff --git a/libs/pbd/pbd/abstract_ui.h b/libs/pbd/pbd/abstract_ui.h
index 905074c474..a8602c7d78 100644
--- a/libs/pbd/pbd/abstract_ui.h
+++ b/libs/pbd/pbd/abstract_ui.h
@@ -26,15 +26,33 @@
 
 #include <glibmm/threads.h>
 
+#include "pbd/libpbd_visibility.h"
 #include "pbd/receiver.h"
 #include "pbd/ringbufferNPT.h"
 #include "pbd/signals.h"
 #include "pbd/base_ui.h"
 
+/* We have a special case in libpbd of a template class that gets instantiated
+ * as the base class of several classes in other libraries. It is not possible
+ * to use LIBFOO_API to mark this visible, because the FOO in each case is 
+ * different. So we define this generic visible/export/hidden/import pair
+ * of macros to try to deal with this special case. These should NEVER be
+ * used anywhere except AbstractUI<T> (or similar cases if they arise.
+ *
+ * Note the assumption here that other libs are being built as DLLs if this one is.
+ */
+
+#ifdef ABSTRACT_UI_EXPORTS
+#define ABSTRACT_UI_API LIBPBD_DLL_EXPORT
+#else
+#define ABSTRACT_UI_API LIBPBD_DLL_IMPORT
+#endif 
+
+
 class Touchable;
 
 template<typename RequestObject>
-class AbstractUI : public BaseUI
+class ABSTRACT_UI_API AbstractUI : public BaseUI
 {
   public:
 	AbstractUI (const std::string& name);
@@ -57,8 +75,7 @@ class AbstractUI : public BaseUI
         };
 	typedef typename RequestBuffer::rw_vector RequestBufferVector;
 
-#if defined(__MINGW32__)
-
+#if defined(COMPILER_MINGW) && defined(PTW32_VERSION)
 	struct pthread_cmp
 	{
 		bool operator() (const ptw32_handle_t& thread1, const ptw32_handle_t& thread2)