There are other variables in Automake that follow similar principles
to allow user options. For instance, Texinfo rules (@pxref{Texinfo})
use @code{MAKEINFOFLAGS} and @code{AM_MAKEINFOFLAGS}. Similarly,
-DejaGnu tests (@pxref{DejaGnu Tests}) use @code{RUNTESTDEFAULTFLAGS} and
-@code{AM_RUNTESTDEFAULTFLAGS}. The tags and ctags rules
+DejaGnu tests (@pxref{DejaGnu Tests}) use @code{RUNTESTFLAGS} and
+@code{AM_RUNTESTFLAGS}. The tags and ctags rules
(@pxref{Tags}) use @code{ETAGSFLAGS}, @code{AM_ETAGSFLAGS},
@code{CTAGSFLAGS}, and @code{AM_CTAGSFLAGS}. Java rules
(@pxref{Java}) use @code{JAVACFLAGS} and @code{AM_JAVACFLAGS}. None