bug#72852: Testsuite summary for GNU Automake 1.17 on x86_64-apple-darwin20.6.0

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FAIL: t/am-default-source-ext.sh
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FAIL: t/cxx-demo.sh
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FAIL: t/subobj-pr13928-more-langs.sh
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FAIL: t/suffix3.tap 8 - make distcheck
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FAIL: t/vala-mix2.sh
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FAIL: t/yacc-cxx.sh
FAIL: t/yacc-bison-skeleton-cxx.sh
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FAIL: t/yacc-d-cxx.sh
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============================================================================
Testsuite summary for GNU Automake 1.17
============================================================================
# TOTAL: 2994
# PASS:  2909
# SKIP:  37
# XFAIL: 40
# FAIL:  8
# XPASS: 0
# ERROR: 0
============================================================================
See ./test-suite.log for debugging.
Some test(s) failed.  Please report this to [email protected],
together with the test-suite.log file (gzipped) and your system
information.  Thanks.
============================================================================
make[2]: *** [test-suite.log] Error 1
make[1]: *** [check-TESTS] Error 2
make: *** [check-am] Error 2