> > Is it not possible to wrap an external DLL-only library in an IMPORTED
> > target?
> >
>
> Yes it is.
>
> > I have an external dependency that is a single DLL (shared library) and a
> > header file, but no LIB (static library) file.
>
> How does this work in Visual Studio C++? If I am not completely mistaken you
> ALWAYS need a .lib file along with your .dll to link to the shared library.
> And you
> Need a header with the API as well of course.
>
> The only case I know with .dll and without .lib file is when you have managed
> C++ or C# targets.
>
The DLL gets loaded using LoadLibrary("MyDependency.dll") at runtime and its
functions are accessed through GetProcAddress():
HINSTANCE hLib = LoadLibrary(DLL_NAME);
If(hLib)
{
typedef int (*DLL_FUNC)();
myFunc = (DLL_FUNC)GetProcAddress(hLib, "DLLFunction");
}
Like I said, it's an external dependency and I don't have any control over it.
The dependency's include directories have to be added to my executable's
include directories and I need to copy the DLL next to the executable. I
thought I'd solve (at least the include directories) by creating an IMPORTED
target, but no matter what I try, the DLL ends up in the linker command line,
wreaking havoc.
Of course I can work around this issue by not creating an IMPORTED target and
just relying on two variables (MyDependency_INCLUDE_DIR and
MyDependency_SHARED_LIB). Before I do, however, I wanted to make sure that
CMake does not in fact support a DLL-and-header-only library set up.
Thanks,
Marek
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