[syslog-ng] syslog-ng-3.5.5 bison: invalid argument `no-yacc' for `--warnings'

[Gergely Nagy]

Scot Needy <scotrn at gmail.com> writes:

> Sorry if this is a dupe. 
>
>
>  Looked through my mail archives and didn’t see any hits. 
>
>
> Trying to compile syslog-ng on CentOS 6.5 final and make fails on bison arguments.

This is a tough problem to fix properly, so I'll offer three workarounds:

 - You can either upgrade to bison 3, which understands those options
 - You can change Makefile.am, and remove/comment out the AM_YFLAGS line
 - You can download a tarball[1] with pre-generated grammar files, which
   do not need neither bison, nor flex.

   [1]: https://github.com/balabit/syslog-ng/releases/download/v3.5.5/syslog-ng-3.5.5.tar.gz

The problem is that bison3 changed to far more verbose, multi-line
warnings, which make the compile awfully noisy. We turn them off with
the -Wno-yacc Wno-other flags, but bison2 does not understand those.

The correct way would be to figure out which bison we use, and use the
appropriate command-line, but the patch to do that has not been written
yet.

Hope this helps!

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