Use all cores

[darkBuddha]

Description

On my 6 core machine, RVM compiles Ruby only with 1 core.

Steps to reproduce

1. rvm install 3.2.2 --enable-yjit

Expected behavior

Ruby should be compiled with all available cores. (make -j$(nproc))

Actual behavior

Environment info

system:

  system:
    uname:        "Linux darkBuddha 6.1.0-14-arm64 #1 SMP Debian 6.1.64-1 (2023-11-30) aarch64 GNU/Linux"
    name:         "Debian"
    version:      "12"
    architecture: "arm64"
    bash:         "/usr/bin/bash => GNU bash, version 5.2.15(1)-release (aarch64-unknown-linux-gnu)"
    zsh:          "/usr/bin/zsh => zsh 5.9 (aarch64-unknown-linux-gnu)"
    remote_path:  "debian/12/arm64"

  rvm:
    version:      "1.29.12 (latest)"
    updated:      "4 minutes 38 seconds ago"
    path:         "/home/darkBuddha/.rvm"
    autolibs:     "[4] Allow RVM to use package manager if found, install missing dependencies, install package manager (only OS X)."

  homes:
    gem:          "not set"
    ruby:         "not set"

  binaries:
    ruby:         "/usr/bin/ruby"
    irb:          "/usr/bin/irb"
    gem:          "/usr/bin/gem"
    rake:         "/usr/bin/rake"

  environment:
    PATH:         "/usr/local/bin:/usr/bin:/bin:/usr/games:/usr/local/go/bin:/home/darkBuddha/.rvm/bin"
    GEM_HOME:     ""
    GEM_PATH:     ""
    MY_RUBY_HOME: ""
    IRBRC:        ""
    RUBYOPT:      ""
    gemset:       ""