In GNU make, a pattern with multiple targets, like:
%.tab.c %.tab.h: %.y
bison -d $<
informs make that the associated recipe (in this example, "bison -d foo.y")
will make create all the targets *at once* (in this example, both 'x.tab.c'
and 'x.tab.h').
Using this semantics we can simplify the parallel testsuite harness nicely,
especially the recipe to build 'test-suite.log' in face of partially
missing prerequisites (e.g., a missing '.trs' file while the corresponding
'.log' file is present and up-to-date).
In doing so, we unfortunately lose the ability to cope with very fringe-case
situations and weird errors (e.g., a '.log' or '.trs' file somehow created
unreadable), but that's a more than fair trade-off for the simplifications
we obtain.
* lib/am/check.am (am__set_TESTS_bases): Removed, superseded by ...
(am__TEST_BASES): ... this new variable.
(check-TESTS, recheck): Adjust these recipes.
(am__TEST_RESULTS): New variable.
(am__check_pre): Adjust, to avoid an extra error (syntax error in the
shell) when a circular dependency due to $(TEST_SUITE_LOG) being listed
in $(TEST_LOGS) is detected.
($(TEST_SUITE_LOG)): Recipe heavily edited and simplified. Also,
depend on $(am__TEST_RESULTS) explicitly.
(.log.trs): Remove this suffix rule, superseded by ...
* lib/am/check2.am (%.log %.trs): ... this new pattern rule.
Remove obsolete suffix rules.
(am__runtest): Adjust.
* automake.in (handle_tests): Adjust minimally.
* lib/Automake/Rule.pm: Skip detection of duplicated rules for pattern
rules; it would be tricky, prone to false positives, and not worth it.
* t/parallel-tests-fork-bomb.sh: Minimal adjustments.
* t/parallel-tests-unreadable.sh: Adjust functional tests.
* t/serial-tests.sh: Adjust grepping checks.
* t/serial-extensions.sh: Likewise.
* t/parallel-tests-fd-redirect.sh: Relax grepping checks.
* t/parallel-tests-fd-redirect-exeext.sh: Likewise.
* t/test-trs-basic.sh: Adjust checks about some internal details that
have been changed.
* t/parallel-tests-no-repeat.sh: New test.
* t/test-trs-recover-parallel.sh: Likewise.
* t/test-driver-trs-suffix-registered.sh: Remove as obsolete.
* t/test-missing2.sh: Remove (as "too picky").
* t/test-trs-recover2.sh: Likewise.
* t/list-of-tests.mk: Update.