This reports violations for 4 units from gigi.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* gcc-interface/trans.cc (gigi): Report a violation of No_Dependence
on System.Stack_Checking if Stack_Check_Probes_On_Target is not set
and -fstack-check is specifie
This makes it possible to report violations of the No_Dependence restriction
during code generation, in other words outside of the Ada front-end proper.
These violations are supposed to be only for child units of System, so the
implementation is restricted to these cases.
Tested on x86_64-pc-linux
