Rev: 569f3da664de81638bcb322d6e9380f3ff16f70c
Did "Update ASN.1 grammar for newer Bison versions."
But there is no version check in libksba for the bison / yacc version and the
change was apparently incompatible.
So building with an older version (CentOS 7 byacc-1.9.20130304-3.el7.x86_64 )
just runs into errors like:
byacc: e - line 92 of "/home/foo/libksba/src/asn1-parse.y", syntax error
%param {void *parm}