Build Ruby with ModGC enabled

Author: eightbitraptor

rubies/4.0.0-dev-modgc

@@ -0,0 +1,26 @@
+# Ruby 4.0 development build with modular GC support
+#
+# This build enables Ruby's experimental modular GC feature, allowing
+# alternative GC implementations to be loaded at runtime.
+#
+# MODULAR GC USAGE:
+#   Ruby is usable as normal in this build, it will use the default Ruby garbage
+#   collector and behave as expected
+#
+#   To use a modular GC, you will require a GC compiled as a shared object with
+#   the name librubygc.name.so to exist in the $MODULAR_GC directory.
+#
+#   It can then be loaded with
+#
+#   RUBY_GC_LIBRARY=name ruby
+#
+# Post-install step to build the default modular GC library
+build_package_modular_gc_install() {
+  log_info "Building modular GC (default)..."
+  capture_command make install-modular-gc MODULAR_GC=default
+}
+
+package_option ruby configure --with-modular-gc="$PREFIX_PATH/lib/ruby/gc"
+
+install_package "openssl-3.4.0" "https://github.com/openssl/openssl/releases/download/openssl-3.4.0/openssl-3.4.0.tar.gz#e15dda82fe2fe8139dc2ac21a36d4ca01d5313c75f99f46c4e8a27571b5486cd" openssl --if needs_openssl:1.0.2-3.x.x
+install_git "ruby-4.0.0-dev-modgc" "https://github.com/Shopify/ruby.git" "master" autoconf enable_shared standard modular_gc_install

test/shopify_ruby_definitions/test_ruby_versions.rb

@@ -19,6 +19,7 @@ def test_ALL_VERSIONS
             (?:\-preview\d*)? # match -preview optionally
                               # preview tag must be before the pshopify tag
             (?:\-pshopify\d*)? # match -pshopify optionally
+            (?:\-dev\-modgc)? # match -dev-modgc for modular GC dev builds
             \z
           }x,
           v,