How to make ruby-build use native Fedora libraries?

[alexanderadam]

On my machine I also have brew installed for various things.
And I'm also using asdf (installed via brew) with asdf-ruby which is making use of ruby-build.

When I'm installing Ruby it's using the homebrew references though instead of the Fedora ones.

It's documented in the README too:

it will try to link Ruby to the appropriate OpenSSL version, even if that means downloading and compiling OpenSSL itself; it will discover and link to Homebrew-installed instances of some libraries like libyaml and readline, etc.

But maybe it's too optimistic regarding that? 🤔

I'd prefer to have the Fedora ones though so I tried the following:

$ sudo dnf install openssl-devel libyaml-devel libffi-devel readline-devel zlib-devel gdbm-devel ncurses-devel gmp-devel

$ export RUBY_CONFIGURE_OPTS="--with-openssl-dir=/usr --with-libyaml-dir=/usr"
export CONFIGURE_ARGS="--with-opt-dir=/usr"
export RUBY_BUILD_SKIP_HOMEBREW=1

It doesn't seem to be enough just to export these though

$ asdf install ruby 3.2.2

==> Installing ruby-3.2.2...
ruby-build: using readline from homebrew
ruby-build: using gmp from homebrew
-> ./configure "--prefix=$HOME/.asdf/installs/ruby/3.2.2" --enable-shared --with-readline-dir=/home/linuxbrew/.linuxbrew/opt/readline --with-gmp-dir=/home/linuxbrew/.linuxbrew/opt/gmp --with-ext=openssl,psych,+ --with-openssl-dir=/usr --with-libyaml-dir=/usr

What am I missing here? 🤔

[mislav]

Hi, is there a problem with Linuxbrew libraries being used over your system ones? Does Ruby fail to compile as a result?

If you want to skip brew packages being used, there is no environment variable like "RUBY_BUILD_SKIP_BREW". Instead, for every dependency you have to pass --with-<LIB>-dir configure options like you're already doing for openssl. It looks like you would still have to do it for gmp and for readline.

I see that you also tried to add --with-opt-dir. That's a valid Ruby configure flag, but instead of in CONFIGURE_ARGS, that should also go into RUBY_CONFIGURE_OPTS. I wonder whether ruby-build should avoid consulting brew packages altogether if that flag was passed? It would save you from having to list every dependency explicitly and point it to /usr.