Only message is "cannot generate code for [...] (subunit)

General
1

What is the following message supposed to mean ? I find that it doesn’t explain anything at all.

drm@84-47-09-37-40-35 ~/D/A/A/a/ch10> gnatmake diary-diary_
view.adb
x86_64-linux-gnu-gcc-13 -c diary-diary_view.adb
cannot generate code for file diary-diary_view.adb (subunit)
gnatmake: “diary-diary_view.adb” compilation error

2

Most of the time when I see that error it is applied to a spec file where I declare a function but don’t have a body for it. I’ve not seen it applied to a body file, so not sure. Maybe check and see if you have any function declarations and if you do, then double/triple check the bodies for them to make sure the signatures match. Maybe a parameter or return type is off by mistake.

3

GNAT gives this message if you try to compile a package spec that needs a body or a separate subunit. As the message says, you’re trying to compile a subunit. You can use --gnatc to check such units.

With most other compilers you can and must compile such units.