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Ignore warning about -force_flat_namespace on macOS
Fix typo
Regenerate with the autoconf 2.72d snapshot.
Repair generate_test_coverage.sh after move to scripts directory.
Move autoconf auxiliary files to the scripts directory.
Remove unused -b option
Update to libtool 2.5.4
mkdep.pl: Prevent infinite recursion when looking for includes
Move some scripts from the top level src dir to a scripts dir.
Newer gcc doesn't support -gxcoff on AIX
Don't assume RHEL major version is only a single digit
Update to protobuf-c 1.5.2