.adt. This not normally required, but is used by separate analysis tools. Typically these tools do the necessary compilations automatically, so you should not have to specify this switch in normal operation. Note that the combination of switches `-gnatct' generates a tree in the form required by ASIS applications.
stdout. The listing includes all units on which the unit being compiled depends either directly or indirectly.
When `-pass-exit-codes' is used, `gcc' exits with an extended exit status and allows an integrated development environment to better react to a compilation failure. Those exit status are:
There was an error in at least one source file.
At least one source file did not generate an object file.
The compiler died unexpectedly (internal error for example).
An object file has been generated for every source file.