rbenv install 3.1.4 fails on Mac M4 15.0.1 (Sequoia)

[dryabinin94]

rbenv install 3.1.4

Installation process log:

Downloading ruby-build...
ruby-build: using openssl@3 from homebrew
==> Downloading ruby-3.1.4.tar.gz...
-> curl -q -fL -o ruby-3.1.4.tar.gz https://cache.ruby-lang.org/pub/ruby/3.1/ruby-3.1.4.tar.gz
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 19.9M 100 19.9M 0 0 8734k 0 0:00:02 0:00:02 --:--:-- 8733k
==> Installing ruby-3.1.4...
ruby-build: using readline from homebrew
ruby-build: using libyaml from homebrew
ruby-build: using gmp from homebrew
-> ./configure "--prefix=$HOME/.asdf/installs/ruby/3.1.4" --with-openssl-dir=/usr/local/opt/openssl@3 --enable-shared --with-readline-dir=/usr/local/opt/readline --with-libyaml-dir=/usr/local/opt/libyaml --with-gmp-dir=/usr/local/opt/gmp --with-ext=openssl,psych,+
-> make -j 12

BUILD FAILED (macOS 15.0.1 on arm64 using ruby-build 20241007)

You can inspect the build directory at /var/folders/x0/p185qzl11xl391xd6379sqz80000gn/T/ruby-build.20241016105503.76864.KctVWB
See the full build log at /var/folders/x0/p185qzl11xl391xd6379sqz80000gn/T/ruby-build.20241016105503.76864.log

Full log - ruby-build.20241016105503.76864.log

Interesting place in log with error:

readline.c:1903:37: error: use of undeclared identifier 'username_completion_function'; did you mean 'rl_username_completion_function'? 1903 | rl_username_completion_function); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | rl_username_completion_function readline.c:79:42: note: expanded from macro 'rl_username_completion_function' 79 | # define rl_username_completion_function username_completion_function | ^ /usr/local/opt/readline/include/readline/readline.h:494:14: note: 'rl_username_completion_function' declared here 494 | extern char *rl_username_completion_function (const char *, int);

[mislav]

This is an often-reported error, but I have yet to determine how to reliably reproduce it or solve it.

From what you've shared, I'm seeing that you have an M1 or M2 Apple machine, but that your Homebrew installation is in /usr/local. On Apple silicon architecture, Homebrew is usually placed in /opt/homebrew, and the fact that yours is in an old location makes me guess that you've either ported your setup from a previous machine running Intel CPU architecture, or that you're running Homebrew in emulated "x64" mode instead of native "arm64". This was a popular solution a while ago to ease transition to Apple silicon, but causes problems in the long run.

What you could try:

1. Reinstalling readline with brew reinstall readline;
2. Reinstalling/moving Homebrew entirely to /opt/homebrew. I don't know how this is easiest done; probably just by uninstalling old Homebrew and reinstalling it and all formula from scratch.

Before reinstalling readline, however, you could check brew info readline to get version information about your current version (the one that is causing problems) and post it here for posterity. If there is a specific version of readline that is not compatible with Ruby, I think it's good for everyone to know.

If the error is really persistent, then it would be helpful for you to share the copy of your ext/readline/mkmf.log log file, where debugging information regarding the compilation of the readline extension will be stored. This could be found under the temporary build location for ruby as reported by ruby-build.