Subdirectories and unresolved symbols

[Sylvain Joyeux]

I have a project with two subdirectories net/ and request/. 
I make Kdevelop building two static libraries libnet.a and 
librequest.a in these subdirectories. 

But when it comes to linking, it looks like ld doesn't know 
anything about libnet symbols when it tries to link 
librequest (and vice-versa)

Is there something to do (something different than putting 
all the source files in the main project directory...) ?

Thank you in advance
-- 
Sylvain Joyeux