is COMMS_EXP being defined somewhere for WIN32?
You usually have a block of code like the following:
#if defined (_WIN32) && defined (BUILD_SHARED_LIBS)
#pragma warning(disable: 4251)
#if defined(Comms_EXPORTS)
#define COMMS_EXP __declspec(dllexport)
#else
#define COMMS_EXP __declspec(dllimport)
#endif /* Comms_EXPORTS */
#else /* defined (_WIN32) && defined (BUILD_SHARED_LIBS) */
#define COMMS_EXP
#endif
--
Mike Jackson Senior Research Engineer
Innovative Management & Technology Services
On Nov 23, 2007, at 7:21 AM, Stephen Collyer wrote:
I'm building some simple shared libraries and an executable
that links against them under both Win32 and Linux. All of
the libraries and exe build and link correctly under Linux,
but when building the DLLs under Win32 I get link errors.
e.g. I have a class that looks like this:
#include <QMutex>
#include <QQueue>
#include <QString>
#include <QWaitCondition>
...
class COMMS_EXP Comms
{
public:
...
private:
QQueue<QString> messageq;
QMutex qmutex;
QWaitCondition message_available;
};
with a cmake command like this:
ADD_LIBRARY(Comms Comms.cpp)
When I build the appropriate project in VS, I get LNK2019 messages
relating to QMutex, QWaitCondition, and so on (I've attached a small
section of these).
I'm not at all clear what's going on here, and I don't even
understand why VS has a "link" stage when building a DLL.
Can anyone explain ? The only possibility I can think of is
that the linker is looking for the export lists from the
Qt libraries (i.e. the .lib files) but is failing to find them.
--
Regards
Steve Collyer
Netspinner Ltd
------ Build started: Project: Comms, Configuration: Debug Win32
------
Compiling...
Comms.cpp
Compiling manifest to resources...
Linking...
Creating library Debug\Comms.lib and object Debug\Comms.exp
Comms.obj : error LNK2019: unresolved external symbol "__declspec
(dllimport) public: __thiscall QMutex::~QMutex(void)" (__imp_??
1QMutex@@[EMAIL PROTECTED]) referenced in function __unwindfunclet$??
0Comms@@[EMAIL PROTECTED]
Comms.obj : error LNK2019: unresolved external symbol "__declspec
(dllimport) public: __thiscall QWaitCondition::QWaitCondition
(void)" (__imp_??0QWaitCondition@@[EMAIL PROTECTED]) referenced in function
"public: __thiscall Comms::Comms(void)" (??0Comms@@[EMAIL PROTECTED])
C
_______________________________________________
CMake mailing list
[email protected]
http://www.cmake.org/mailman/listinfo/cmake
_______________________________________________
CMake mailing list
[email protected]
http://www.cmake.org/mailman/listinfo/cmake
