Install C compiler

You need to install the command line developer tools or the Xcode. (The latter includes the former.)

Run "cc --version" in a terminal to check whether they are installed.

If the cc version is printed, the tools are installed.

If the follwoing dialog is displayed, click its Install button to install the tools. You have no need to install the Xcode to compile ruby-oci8. It requires command line tools, not an IDE such as the Xcode.

dialog

If "Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo." is printed, you need to run "sudo cc --version", enter your password, look at the license and type "agree".

Install Oracle Instant Client Packages

Download Oracle Instant Client Packages

Download the following packages from Oracle Technology Network

Instant Client Package - Basic or Basic Lite
Instant Client Package - SDK
Instant Client Package - SQL*Plus (optionally)

Install Oracle Instant Client Packages via Homebrew

To install Oracle Instant Client Basic Lite via Homebrew

Download two instant client packages: Basic Lite and SDK and put them in /Library/Caches/Homebrew (if the environment variable HOMEBREW_CACHE is not set and $HOME/Library/Caches/Homebrew doesn't exist.)

Run the followining commands:

brew install InstantClientTap/instantclient/instantclient-basiclite
brew install InstantClientTap/instantclient/instantclient-sdk

To install Oracle Instant Client Basic via Homebrew

Download three instant client packages: Basic, Basic Lite and SDK and put them in /Library/Caches/Homebrew (if the environment variable HOMEBREW_CACHE is not set and $HOME/Library/Caches/Homebrew doesn't exist.)

Run the followining commands:

brew install InstantClientTap/instantclient/instantclient-basic
brew install InstantClientTap/instantclient/instantclient-sdk

Set the environment variable OCI_DIR while performing the following installation steps if Homebrew is installed outside /usr/local.
```
export OCI_DIR=$(brew --prefix)/lib
```

Install Oracle Instant Client Manually

If you don't use Homebrew, do the following:

Unzip the packages as follows:

mkdir /opt
mkdir /opt/oracle
cd /opt/oracle

Copy downloaded files to /opt/oracle before running the following commands.

unzip instantclient-basic-macos.x64-11.2.0.4.0.zip
unzip instantclient-sdk-macos.x64-11.2.0.4.0.zip
unzip instantclient-sqlplus-macos.x64-11.2.0.4.0.zip

Make a symbolic link to link the library.

cd /opt/oracle/instantclient11_2
ln -s libclntsh.dylib.11.1 libclntsh.dylib

Fix the library install and identification names using fix_oralib to make them work without DYLD_LIBRARY_PATH.

cd /opt/oracle/instantclient11_2
curl -O https://raw.githubusercontent.com/kubo/fix_oralib_osx/master/fix_oralib.rb
ruby fix_oralib.rb

Set the environment variable OCI_DIR while performing the following installation steps.

export OCI_DIR=/opt/oracle/instantclient11_2

Installation

If you get a problem in the following steps, look at report-installation-issue.

gem package

Run the following command.

gem install ruby-oci8

tar.gz package

Download the source code

Download the latest tar.gz package from download page.

Run make and install

tar xvfz ruby-oci8-VERSION.tar.gz
cd ruby-oci8-VERSION
make
make install