On Wed, 2005-07-13 at 10:24 -0700, TJ O'Donnell wrote: > > > > It sounds like you need to link gnova.so against the other shared > > objects so the runtime linker can find them. For examples, see the > > Makefiles used by contributed modules like dblink, xml2, and a few > > others that link against external libraries. > > > That approach is working, but only after much troubles. > I have several 3rd party libraries, some of which call each other. > It appears I need to carefully order the libraries in the > link step, or some needed functions do not get included in the > final .so. > > This problem used to crop up all the time way back 20 years ago > with linkers. I thought all this name resolution stuff was all worked > out with modern linkers. I'm "linking" with (linux redhat) > gcc -shared -o my.so my.o my2.o their.a their2.a their3.a > When function x() in their2.a calls something in their.a > (or is it the other way around?) > I get an error from postmaster that my.so cannot be loaded because > function x cannot be found. > If I reverse their.a their2.a in the link command, all is well. > Note: I never use, nor even knew about the exitence of function x() - "they" do. > > Any help on how to make this more pain-free? > > TJ > I don't know much about pgsql but I do know that when linking if module1 needs something in module2 and module2 needs something in module1 then you can put the the same module in the library link (i.e. '-l') list more than once. > > Michael Fuhr wrote: > > On Mon, Jul 11, 2005 at 08:16:17PM -0700, TJ O'Donnell wrote: > > > >>CREATE or REPLACE FUNCTION cansmiles(varchar) RETURNS varchar > >> AS 'gnova', 'oe_cansmiles' LANGUAGE 'c' IMMUTABLE STRICT; > >>requires preloading of oe_chem.so to work. > >> > >>Is there any way I can associate oe_cansmiles with 2 .so's without > >>preloading? > > > > > > It sounds like you need to link gnova.so against the other shared > > objects so the runtime linker can find them. For examples, see the > > Makefiles used by contributed modules like dblink, xml2, and a few > > others that link against external libraries. > > > ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
