Undefined references on run, SSL

Question

Trying out Kemal in a VM, fresh install of Arch-Linux with gc, openssl, crystal, and shard packages. Ran through steps on Kemal guide for simple web app, but errors upon crystal run src/test_app.cr:

_main.o: In function '__crystal_main':
/usr/lib/crystal/openssl/lib_ssl.cr:213: undefined reference to 'SSL_Library_init'

...followed by a lot of similar error messages, undefined references etc.

Am I missing a dependency?

I can run a basic crystal program without kemal, such as puts "Hello World", with no problem — Aaron Thomas, Oct 19 '17 at 02:24
Are you pissing the `pkg-config` package? You should install the `base-devel` group. — Stephie, Oct 19 '17 at 14:38
@RX14 that was it. After installing base-devel everything was cool. Care to write as answer, so I can mark this question as answered in case someone else experiences same error? — Aaron Thomas, Oct 20 '17 at 00:57

score 1 · Accepted Answer · answered Oct 20 '17 at 15:29

Install the base-devel package group using pacman -S base-devel.

On Arch Linux, Crystal is a compiler package so it assumes you have base-devel installed. Without the pkg-config package, Crystal can't find out which version of OpenSSL you have installed and can't link to it.

Undefined references on run, SSL

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