I am running Elementary OS and I just installed libvips-dev using apt-get. When I run "gem install ruby-vips -v '0.3.9'" I get this error:
extconf.rb:27:in `<main>': no pkg_config for any of following libvips
versions: 7.29, 7.28, 7.27, 7.26, 7.24, 7.23, 7.22, 7.20 (RuntimeError)
extconf failed, exit code 1
From my simple knowledge, maybe this means that the gem cannot find the installation of libvips-dev (I know it is required.) What does this error mean and how do I install this library?