building gold from release tarball requires bison?

[Benjamin Peterson]

Hi,
At least the binutils-2.29 tarball, the generated parser for
gold/yyscript.y is not included, so building gold requires bison. Since
other bison parsers (e.g., binutils/defparser.c) seem to be generated
into the release tarball, am I correct in assuming this is an oversight
in the release process? gold/README does promise "If you are building
gold from an official binutils release,
the bison output should already be included."

Thanks,
Benjamin