Does link line order for supc++ really matter?

Question

Hello,

This is a follow up to an earlier question -

http://stackoverflow.com/questions/1227615/how-to-use-a-different-stl-with-g

I can now get my code to build while using a different STL. However, I still need to link -lsupc++ (along with said different STL)

I see anecodal references that -lsupc++ should be the last library on the link line. I cannot find a definitive answer to this. Currently, it is not the last library on the link line for me and things seem to work fine.

Thanks!

Answer 1

Link line ordering is a picky, cranky thing. The rule is that libraries have to be linked in reverse dependency order: if object A is in libfoo, and depends on object C from libbar, then the link line needs to go -lfoo -lbar and not the other way around. Having -lsupc++ at the end makes sure that if any other libraries you're linking depend on objects in libsupc++, the dependency will resolve correctly. In your case, the trailing libraries probably just don't have any unresolved dependencies.