11.9.2 Qualified Projects

Before the reserved project, there may be one or two qualifiers, that is identifiers or reserved words, to qualify the project. The current list of qualifiers is:

abstract: qualifies a project with no sources. Such a

project must either have no declaration of attributes Source_Dirs, Source_Files, Languages or Source_List_File, or one of Source_Dirs, Source_Files, or Languages must be declared as empty. If it extends another project, the project it extends must also be a qualified abstract project.

standard: a standard project is a non library project with sources.

This is the default (implicit) qualifier.

aggregate: a project whose sources are aggregated from other

project files.

aggregate library: a library whose sources are aggregated

from other project or library project files.

library: a library project must declare both attributes

Library_Name and Library_Dir.

configuration: a configuration project cannot be in a project tree.

It describes compilers and other tools to gprbuild.