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Automake supports a two forms of test suite.
If the variable TESTS is defined, its value is taken to be a list
of programs to run in order to do the testing. The programs can either
be derived objects or source objects; the generated rule will look both
in srcdir and .. The number of failures will be printed at
the end of the run.
If ‘dejagnu’ appears in AUTOMAKE_OPTIONS, then the a
dejagnu-based test suite is assumed. The value of the variable
DEJATOOL is passed as the --tool argument to
runtest; it defaults to the name of the package. The variables
EXPECT, RUNTEST and RUNTESTFLAGS can also be
overridden to provide project-specific values. For instance, you will
need to do this if you are testing a compiler toolchain, because the
default values do not take into account host and target names.
In either case, the testing is done via ‘make check’.