Experimental Physics and
Industrial Control System

On 06/30/2018 06:41 AM, Mark Rivers wrote:
> Hi Michael,
>
> Thanks, adding the second line below to the Makefile fixed it.
>
> PROD_SYS_LIBS += giomm-2.4
> PROD_SYS_LIBS += gio-2.0 gobject-2.0 gthread-2.0 glib-2.0
>
> I was puzzled why it worked previously when the Makefile contained only the first line, i.e. giomm=2.4.
>
> I think I have figured it out.  If I add this line to the Makefile it builds fine without the second line above:
>
> STATIC_BUILD=NO
>
> If it is building dynamically then libgiomm-2.4.so has the information it needs to know what other libraries are required.  But if I build statically then I need to specify the other libraries.  When this worked previously for me I must have been building dynamically.  Does this make sense?

Yes.  Static libraries (.a files) don't contain the dependency information found in shared object (.so).
So when linking STATIC_BUILD=NO, only the direct dependencies need to be listed (it doesn't hurt to list all).
With STATIC_BUILD=YES, all dependencies must be listed, and in a specific order (direct first).