pbc_header.pl - PBC header info and manipulation
perl pbc_header.pl files ... perl pbc_header.pl --update-fingerprint files ...
The PBC_COMPAT file is used to maintain Parrot bytecode compatibility. During release preparation (and other changes to PBC_COMPAT) the fingerprint of existing bytecode files is invalidated.
This utility updates the version and fingerprint information in the bytecode, but can of course not assure that it will run correctly, when incompatible changes were done.
If no options are given, a summary of the PBC header is printed to STDOUT.
pbc_dump -h utility does a much more thorough job of showing bytecode file headers, but fails with version-incompatible pbc files.