ld is the linker which collects all the object modules and libraries, and combines them into a new library, or an executable program. The library options to the linker are as follows: -L followed by a directory path, adds that directory to the list of locations to be searched for any additional libraries. -l add the undecorated library name to the list of libraries required by the object code. Note that libraries are commonly held in files which are named liblibraryname.suffix, where suffix is .a or .so. However the name specified on the option line should just be libraryname, i.e. no preceing lib and no suffix. And no directory paths.
So the options you should be using for /media/jim/OpenCL/OpenCV/build/lib/libopencv_flann_pch_dephelp.a should be something like:
To nail it down again:
The -l option requires a stripped library name without path, lib prefix, and extension!
When specifying all library pathes with the -L option, it must be just:
The linker (ld) will then search all directories specified with the -L option for matching files by building the full name from the path actually searched, appending the lib prefix, appending the name passed to the -l option, and appending the extension .a. If that fails for a path, it tries again with the extension .so.
I am new to this device driver development field.
I am asked to write a Windows device driver for capturing the kernel system calls for any particular Win32 API call.
There is one MFC Dialog based application which will call the Win32 API(Ex: CreateFile() with proper arguments)
At the same time the device driver should capture all the Kernel system calls which are called corresponding to the CreateFile() API. Those Kernel system call I need to display on the GUI of my appllication at real time.
Please share any Article or the guide me in acheiveing this.
A device driver is a software that accesses a device (some kind of real or virtual hardware). What you are looking for is called API hooking or API monitoring (just search the web for these terms combined with C++ and Windows).
I tried to explore WinAPIOverride.
Will this application display Kernel System calls? I doubt. It is showing some addresses in the call stack, but not the actual system calls name. Is is possible to get the names of the kernel system calls?
for example,If CObject has a "Hello" property,I can set it's value like this:
CObject* pObject = new CObject("switch");
but It is not very good enough,if I code like this:
here,I write the wrong property name ,but the code wouldn't generate any error at compile time.
1 there is a lot class defined by string
2 there may be a lot of objects defined by any class
3 there is a lot of properties for each object
My question is how could I avoid the above mistake at compile time?
Thank you all
I could check whether a property is in the set or not at run time.
but I want to check it at compile time.
I just write "Helloooooooo" instead of "Hello" by mistake.
I want to find out this mistake when I compile it.
The only way to provoke a compiler error would be to pass the knowledge of the full list of class properties to the compiler, at compile time. That would defeat the purpose of a generic class definition, and you could just as well define simple member variables instead.
This raises the question: where do your requirements come from, i. e the two requirements to define a generic class, and to force compile time errors when accessing an incorrectly labeled property? One of them has to go.
GOTOs are a bit like wire coat hangers: they tend to breed in the darkness, such that where there once were few, eventually there are many, and the program's architecture collapses beneath them. (Fran Poretto)
There is a certain window, about which we know hDC & hWnd.
By the window is used function SwapBuffer(hDC). I understand that the double buffer, and that buffer contains a certain image that is drawn in the window.
Is it possible in any way to copy the contents of the buffer to a compatible Bitmap or Image for Saving it into graphic file format?
You will need to allocate memory to hold the bits. That size is slightly tricky it depends on what color depth you are going to ask for in bits. Typically you want RGB24 or RGB32 and the size also needs to be aligned to a 4 byte boundary. Anyhow long story short its a funny maths calc and we need to setup a bitmap header info for the call ... Lets do 24 bit colour.