Patrick Hartling wrote:
Marcus Lindblom wrote:
Patrick Hartling wrote:
I have made some big progress in getting PyOpenSG updated to the OpenSG
2.0 trunk, but I have run up against problems related to class templates
with static data members.
[snip]
My hope is that this can be fixed
with a GCC compiler option or something that is similarly non-invasive
to the OpenSG code in question. Does anyone have any ideas or
suggestions about how this can be resolved?
Have you tried the python-c++ list? It's hard to think you're the first
one to encounter this.
Just offer something: On Windows, you can tell the compiler that a
certain template instantiation is to be exported from a dynamic library.
I don't know if something similar is possible with GCC, but I've heard
rumours lately about explicit export and automatic hiding there.
No, I hadn't asked there yet. I was just about to send them a message when I
tried something that seems to resolve things in a fairly clean manner. If I
modify the class declaration to be the following, things appear to be
working for me:
template<typename T>
class C
{
public:
// Leave initialization here.
static const int static_member = 0;
};
// Add static data member definition statement;
template<typename T> const int C<T>::static_member;
If I hadn't been so focused on the full type instantiation, I might have
tried this sooner. I am running a build right now to test this.
The attached patch fixes up the problem that I was seeing. There are
probably going to be other cases that I discover while working through the
load-time errors. Is this change acceptable?
-Patrick
--
Patrick L. Hartling
Senior Software Engineer, Priority 5
http://www.priority5.com/
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Index: Source/Base/FieldContainer/Mixins/OSGStageHandlerMixin.inl
===================================================================
--- Source/Base/FieldContainer/Mixins/OSGStageHandlerMixin.inl (revision 1732)
+++ Source/Base/FieldContainer/Mixins/OSGStageHandlerMixin.inl (working copy)
@@ -38,6 +38,15 @@
OSG_BEGIN_NAMESPACE
+OSG_RC_FIELD_TMPL_DEF (template<class ParentT>,
+ StageHandlerMixin<ParentT>, UpdateMode );
+OSG_RC_FIELD_TMPL_DEF (template<class ParentT>,
+ StageHandlerMixin<ParentT>, RequestRun );
+OSG_RC_FIELD_TMPL_DEF (template<class ParentT>,
+ StageHandlerMixin<ParentT>, DestroyedFunctors);
+OSG_RC_LAST_FIELD_TMPL_DEF(template<class ParentT>,
+ StageHandlerMixin<ParentT> );
+
template <class ParentT> inline
void StageHandlerMixin<ParentT>::classDescInserter(TypeObject &oType)
{
Index: Source/Base/FieldContainer/Base/OSGReflexiveContainer.h
===================================================================
--- Source/Base/FieldContainer/Base/OSGReflexiveContainer.h (revision 1732)
+++ Source/Base/FieldContainer/Base/OSGReflexiveContainer.h (working copy)
@@ -393,6 +393,18 @@
#define OSG_RC_FIELD_DESC(OSG_FIELDNAME) \
OSG_FIELDNAME##FieldId, OSG_FIELDNAME##FieldMask
+#define OSG_RC_FIELD_TMPL_DEF(OSG_TMPLDECL, OSG_CLASSNAME, OSG_ELEMNAME) \
+ OSG_TMPLDECL const OSG::UInt32 OSG_CLASSNAME::OSG_ELEMNAME##FieldId; \
+ OSG_TMPLDECL const OSG::BitVector OSG_CLASSNAME::OSG_ELEMNAME##FieldMask
+
+#define OSG_RC_LAST_FIELD_TMPL_DEF(OSG_TMPLDECL, OSG_CLASSNAME) \
+ OSG_TMPLDECL const OSG::UInt32 OSG_CLASSNAME::NextFieldId; \
+ OSG_TMPLDECL const OSG::BitVector OSG_CLASSNAME::NextFieldMask
+
+#define OSG_RC_NO_FIELD_TMPL_DEF(OSG_TMPLDECL, OSG_CLASSNAME) \
+ OSG_TMPLDECL const OSG::UInt32 OSG_CLASSNAME::NextFieldId; \
+ OSG_TMPLDECL const OSG::BitVector OSG_CLASSNAME::NextFieldMask
+
OSG_END_NAMESPACE
#include "OSGFieldDescriptionBase.h"
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