While Automake is intended to be used by maintainers of GNU packages, it does make some effort to accommodate those who wish to use it, but do not want to use all the GNU conventions.
To this end, Automake supports three levels of strictness—how stringently Automake should enforce conformance with GNU conventions. Each strictness level can be selected using an option of the same name; see Changing Automake’s Behavior.
The strictness levels are:
This is the default level of strictness. Automake will check for basic compliance with the GNU standards for software packaging. See The GNU Coding Standards, for full details of these standards. Currently the following checks are made:
If the --add-missing option is given,
add a generic version of the INSTALL file as well as the
COPYING file containing the text of the current version of the
GNU General Public License existing at the time of this Automake release
(version 3 as this is written,
However, an existing COPYING file will never be overwritten by
Future versions of Automake will add more checks at this level of strictness; it is advisable to be familiar with the precise requirements of the GNU standards.
Future versions of Automake may, at this level of strictness, require
certain non-standard GNU tools to be available to maintainer-only
Makefile rules. For instance, in the future
(see pathchk invocation in GNU Coreutils)
may be required to run ‘make dist’.
Automake will check for only those things that are absolutely required for proper operation. For instance, whereas GNU standards dictate the existence of a NEWS file, it will not be required in this mode. This strictness will also turn off some warnings by default (among them, portability warnings).
Automake will check for compliance to the as-yet-unwritten Gnits standards. These are based on the GNU standards, but are even more detailed. Unless you are a Gnits standards contributor, it is recommended that you avoid this option until such time as the Gnits standard is published (which is unlikely to ever happen).
Currently, --gnits does all the checks that --gnu does, and checks the following as well:
VERSIONis checked to make sure its format complies with Gnits standards.
VERSIONindicates that this is an alpha release, and the file README-alpha appears in the topmost directory of a package, then it is included in the distribution. This is done in --gnits mode, and no other, because this mode is the only one where version number formats are constrained, and hence the only mode where Automake can automatically determine whether README-alpha should be included.