Bison latest version installed but not in use

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$ brew install bison
Warning: bison-3.0.2 already installed
$ bison -V
bison (GNU Bison) 2.3

How can I change the Bison version in use to 3.0.2? I'm on OS X 10.9.4. I've restarted my terminal after $brew install bison.

UPDATE

I'm really not sure if this is a problem of HomeBrew or Bison. I reinstalled Bison with MacPorts:

$port install bison
......
$bison -V
bison (GNU Bison) 2.7.12-4996

MacPorts did not install the latest version of Bison, but it did change the Bison version in use to the one it installed.

UPDATE ON $PATH

$echo $PATH
/opt/local/bin:/opt/local/sbin:/usr/local/bin:/Users/my_user_name/.rbenv/shims:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/munki:/usr/local/mysql/bin:/Users/my_user_name/code/bin:/Users/my_user_name/code/bin/git:/Users/my_user_name/code/bin/old_git:/Users/my_user_name/code/bin:/Users/my_user_name/code/bin/git:/Users/my_user_name/code/bin/old_git:/Users/my_user_name/.rvm/bin

You have /opt/local/bin in your path before /usr/local/bin. Homebrew installs in /usr/local/bin by default so maybe you have another version in /opt/local/bin that gets found first.

Why does my Mac (OS X 10.7.3) have an old version (2.3) of Gnu , If you use MacPorts: sudo port install you can install a new version with homebrew: But if you run: bison -V , it will still output 2.3, not the newly install 3.0.4. I am not root on the HPC and the version installed is the 2.3. I need a newer version because of another program. I have installed version 2.4 on my home directory but when I type which bison, what I get is: /usr/bin/bison. How can I update the bison path to the new version? Posted by: Marchelus on Dec 04, 2013

I just ran into the same issue - in my case brew wasn't creating the symlinks. You can force this in order to get the right version via:

$ brew unlink bison
Unlinking /usr/local/Cellar/bison/3.0.4... 0 symlinks removed

$ brew link bison
Warning: bison is keg-only and must be linked with --force
Note that doing so can interfere with building software.

$ brew link bison --force
Linking /usr/local/Cellar/bison/3.0.4... 9 symlinks created

$ source ~/.bash_profile
$ bison -V
bison (GNU Bison) 3.0.4

Installing Bison (Yacc) on a Mac, I've had to install v3 on my machine twice now, so I figured it was something that should be documented - if for no other reason than to help Future Rob. Download Bison. Go to the Bison page and download the latest version of Bison. Extract� The package provides the installation files for Lenovo EasyCamera Bison Driver version 6666.43.50.23. If the driver is already installed on your system, updating (overwrite-installing) may fix various issues, add new functions, or just upgrade to the available version.

$ brew unlink bison
Unlinking /usr/local/Cellar/bison/3.4... 0 symlinks removed

$ brew install bison

$ brew link bison --force
Linking /usr/local/Cellar/bison/3.4... 9 symlinks created

$ echo 'export PATH="/usr/local/opt/bison/bin:$PATH"' >> ~/.bash_profile

$ export LDFLAGS="-L/usr/local/opt/bison/lib"

$ source ~/.bash_profile
$ bison -V
bison (GNU Bison) 3.4

How to download and install Bison (GNU Parser Generator) on , This short tutorial shows you how to download and install Bison (GNU Parser with little or no change at all (including other Linux distributions and even unixes e.g. For this tutorial, I'll be downloading and installing Bison version 2.3. Before starting, please check to see if there is a latest version available to download. You only need to install like that if you're running El Capitan as it's not officially supported. If you are running non-beta OSX, then there is binary installer available. – trojanfoe Aug 4 '15 at 10:08

thanks for Andrew answer. Just a little improve, do not need --force

brew link bison
Warning: bison is keg-only and must be linked with --force
Note that doing so can interfere with building software.

If you need to have this software first in your PATH instead consider 
running:
   echo 'export PATH="/usr/local/opt/bison/bin:$PATH"' >> ~/.zshrc

I use the suggest echo patch to zshrc, after source ~/.zshrc, the bison was the newest version(use brew install bison version).

Bison - GNU Project - Free Software Foundation, Once you are proficient with Bison, you can use it to develop a wide range of all properly-written Yacc grammars ought to work with Bison with no change. Test releases: Trying the latest test release (when available) is always appreciated. Download below or visit bison.la for a download link. To Install, follow the Grasshopper drop-down menu to File > Special Folders > Components. Save the ghpy file here and it will be loaded automatically. If installing an update, be sure to remove the previous version from the Components folder.

Bison can be installed with pip. pip install bison or with pipenv. pipenv install bison Using Bison Creating a configuration Scheme. A configuration scheme is not required by Bison, but having one allows you to set default values for configuration fields as well as do configuration validation. It is pretty easy to create a new Scheme: scheme

If your synaptic package manager currently does not include these packages, you can install Flex and Bison through a simple terminal command. N.B. This method is specific to Ubuntu 10.4 but should also work for later versions.

The documentation is also available in PDF and HTML, provided you have a recent version of Texinfo installed: run "make pdf" or "make html". If you have questions about using Bison and the documentation does not answer them, please send mail to <help-bison@gnu.org>. * Bug reports Please send bug reports to <bug-bison@gnu.org>.

Comments
  • seems like a path problem.. what is the output of echo $PATH?
  • well.. as far as I can see: you have /opt/local/bin in your path before /usr/local/bin. Homebrew installs in /usr/local/bin by default so maybe you have another version in /opt/local/bin that gets found first.
  • I do have a bison in /opt/local/bin! Thanks! Do you mind moving your comment to answer so that I can accept it?
  • moved to answer.. thanks ;)