The object directory for a project is the directory containing the compiler's output (such as ALI files and object files) for the project's immediate sources. Note that for inherited sources (when extending a parent project) the parent project's object directory is used.
The object directory is given by the value of the attribute Object_Dir
in the project file.
for Object_Dir use "objects";
The attribute Object_Dir has a string value, the path name of the object directory. The path name may be absolute or relative to the directory of the project file. This directory must already exist, and be readable and writable.
By default, when the attribute Object_Dir is not given an explicit value
or when its value is the empty string, the object directory is the same as the
directory containing the project file.