gem eventmachine fatal error: 'openssl/ssl.h' file not found

Question

Just installed El Capitan and can\'t install gem eventmachine 1.0.7. openssl is at 1.0.2a-1. Tried to use --with-ss

Answer 1

One alternative is to add a bundler config entry for your whole user profile, like this:

cd ~
bundle config build.eventmachine --with-cppflags=-I$(brew --prefix openssl)/include

it'll create a .bundle/config file in your home directory, which is then used in all your projects when you run bundle install.

Answer 2

I was trying to install v 1.0.3 and this worked for me.

gem install eventmachine -v '1.0.3' -- --with-cppflags=-I/usr/local/opt/openssl/include

These discussions were very helpful. https://github.com/eventmachine/eventmachine/issues/602

Answer 3

This solved the problem for me:

PKG_CONFIG_PATH="$(brew --prefix openssl)/lib/pkgconfig" gem install eventmachine -v "1.0.8"

Source: https://github.com/sj26/mailcatcher/issues/254