Create a new project file (Empty is enough), add main.c to the project (I guess you have it already. If not, just create it),
Project -> Build options... go to the
Linker settings tab, in
Other linker options add:
`pkg-config --cflags --libs gstreamer-0.10`
click OK.
Now, if you really want the executable to be called
gstreamer, just go to
Project -> Properties. Go to the
Build targets tab and there you will see the
Output filename option.
That should be it.
You can see the command line it executes too. Just go to
Settings -> Compiler and debugger..., search the
Other settings tab (in
Global compiler settings) and set
Full command line for
Compiler logging.