Make doesn't understand wich files have been modified

[Andrea.Pasetti]

When i modify an header file (.h) and then i compile the project, not all
sorce (.c) files that include the modified header are re-compiled by make.
I've no problems when i modify only the source .c files.

Make invocation is made with the following command:
make -k pre-build main-build

Any suggestion?

Thanks
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