On Tue, Sep 14, 2010 at 02:06:07PM -0700, Peter Taps wrote:
> Folks,
>
> I am getting an unresolved external when trying to create a shared library. I
> would appreciate it if someone can help me identify the problem.
>
> Here is my simplified main.cpp program:
>
> #include <libzfs.h>
>
> int main() {
> libzfs_init();
> return 0;
> }
>
> When I compile this program to create a standard executable, there are no
> link errors:
> $ g++ -lzfs -o main main.cpp
>
> Note: For clarity, I have removed a couple of include parameters.
>
> In my case, I need to create a shared library. Here is the command I am using:
>
> $ g++ -lzfs -o main.so main.cpp -shared
>
> However, now I get an unresolved error for "libzfs_init."
>
> If I add any std templates such as string, vector, I get a bunch more errors.
>
> Can someone please tell me how to fix it? It must be some simple switch on
> the linker.
Generally, you must include libraries *after* the objects which reference
them. Try:
$ g++ -shared -o main.so main.cpp -lzfs
Cheers,
- jonathan
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