Failed to compile in CentOS 7 about ack HOT 7 OPEN

It seems that it's caused by old version of Bison (2.7 in CentOS 7), which do not include macro definitions for those constants (only enum definition is included), but util/ncgg/cvtkeywords relys on those macros to work properly.

from ack.

Complied successfully after I change bison to byacc, I'll close this issue.

from ack.

Bison 3.0.4 still uses enum, not macros, for the token names. I don't use bison with ack, but this is a parse.c from Ruby:

/* A Bison parser, made by GNU Bison 3.0.4.  */
...
  enum yytokentype
  {
    END_OF_INPUT = 0,
    keyword_class = 258,
    keyword_module = 259,
    keyword_def = 260,
...

Either we should fix ncgg to work with bison, or we should document in the top-level README that yacc can't be bison.

from ack.

I found that Bison 3.0.4 does make the token macros, if I run it in yacc mode (bison -y). So ncgg works with bison -y.

from ack.

Are there any non-Bison yaccs still around? Could we just switch to bison -y instead?

from ack.

The other two flavors are Berkeley yacc and System V yacc. I am using OpenBSD's Berkeley yacc. I haven't tried System V yacc; it is part of systems like Solaris and Illumos, or in the Heirloom tools.

I don't see any reason to switch to bison -y.

from ack.

I built the current github tree on RHEL 7 with no problem.

Visit http://oberon07/dee/ and click on RPMs for an RPM you can install.

from ack.