Calling constructor functions manually

["Michał Bieliński"]

Hello,

I am linking C object files which rely on functions with constructor
attribute with my program. Ordinarily gcc generates code calling all such
routines before main gets control. However, my program is not written in C
and such code is not included. Resulting executable works but linked
objects refuse to cooperate because their initializing constructors were
not called. Is there a way to manually run these functions?

-- 
Michal Bielinski