dlopen failing on library with statically linked dependencies Post: 302433066

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Top Forums Programming dlopen failing on library with statically linked dependencies Post 302433066 by Hodapp87 on Monday 28th of June 2010 10:41:28 AM

06-28-2010

Registered User

Quote:

Originally Posted by jim mcnamara

Try creating a dummy function, one that you do not call, that has a reference to the required function symbols(s) in the .a file. Also declare variables as extern. This will force the link editor to load the symbol from the archive at link time. nm <myprogram> should show the symbols like _ZN29vtkInformationStringVectorKeyC1EPKcS1_i

That one looks like you need to declare it extern. Does nm show it having an entry point?

The issue here is that I really have no idea where the aforementioned symbol is even used. I can't find any references to it in the rather large code (most of which I did not write). Given that it builds and runs on OS X (static library there too), perhaps before making extensive changes to the code I should try building VTK as shared rather than static.

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xvgrabport

XvGrabPort(3)							  libXv Functions						     XvGrabPort(3)

NAME

       XvGrabPort - lock port for exclusive use by client

SYNOPSIS

       #include <X11/extensions/Xvlib.h>

       int XvGrabPort(Display *dpy, XvPortID port, Time time);

ARGUMENTS

       dpy     Specifies the connection to the X server.

       port    Defines the port to be grabbed.

       time    Specifies the request timestamp.

DESCRIPTION

       XvGrabPort(3) grabs a port.  Once a client grabs a port, only that client can make video requests to that port.

       If  the	time  is  before  the  current port time, the XvGrabPort request is ignored and XvInvalidTime is returned.  If the port is already
       grabbed by another client, XvAlreadyGrabbed is returned. Otherwise it returns a status of Success.  The port time is updated when the  fol-
       lowing requests are processed: XvGrabPort(3), XvUngrabPort(3), XvPutVideo(3), XvPutStill(3), XvGetVideo(3), XvGetStill(3).

       If  the port is actively processing video for another client, the video is preempted, and an XvVideoNotify event with detail XvPreempted is
       generated for its drawable.

RETURN VALUES

       [Success]
	       Returned if XvGrabPort(3) completed successfully.

       [XvInvalidTime]
	       Returned if requested time is older than the current port time.

       [XvAlreadyGrabbed]
	       Returned if the port is already grabbed by another client.

       [XvBadExtension]
	       Returned if the Xv extension is unavailable.

       [XvBadAlloc]
	       Returned if XvGrabPort(3) failed to allocate memory to process the request.

DIAGNOSTICS

       [XvBadPort]    Generated if the requested port does not exist.

SEE ALSO

       XvUngrabPort(3), XvVideoNotify(3)

X Version 11							    libXv 1.0.7 						     XvGrabPort(3)