using Build Workspace with project that uses makefile

[pibeac]

Hi,
I have a workspace with 3 projects. One is an application and the two others are dll ( used by the app ). Each project has it's own makefile. When i compile them separately, i don't have any problem, but when i try to build the whole workspace, the compiler starts without using the makefile.... why is that? can i configure something to tell the Build Workspace process to uses the makefile specified by each particular projects?

Thanks!