Merge pull request #90151 from doronbehar/ruby-gcc-ref

nixos/doc/manual/release-notes/rl-2103.xml

@@ -89,6 +89,18 @@
      user D-Bus session available also for non-graphical logins.
     </para>
    </listitem>
+   <listitem>
+     <para>
+       <literal>rubyMinimal</literal> was removed due to being unused and
+       unusable. The default ruby interpreter includes JIT support, which makes
+       it reference it's compiler. Since JIT support is probably needed by some
+       Gems, it was decided to enable this feature with all cc references by
+       default, and allow to build a Ruby derivation without references to cc,
+       by setting <literal>jitSupport = false;</literal> in an overlay. See
+       <link xlink:href="https://github.com/NixOS/nixpkgs/pull/90151">#90151</link>
+       for more info.
+     </para>
+   </listitem>
    <listitem>
     <para>
      The option <option>fonts.enableFontDir</option> has been renamed to

pkgs/development/interpreters/ruby/default.nix

@@ -44,11 +44,22 @@ let
       , groff, docSupport ? true
       , libyaml, yamlSupport ? true
       , libffi, fiddleSupport ? true
-      # ruby -e "puts RbConfig::CONFIG['configure_args']"
-      # puts a reference to the C compiler in the binary.
-      # This might be required by some gems at runtime,
-      # but we allow to strip it out for smaller closure size.
-      , removeReferencesTo, removeReferenceToCC ? true
+      # By default, ruby has 3 observed references to stdenv.cc:
+      #
+      # - If you run:
+      #     ruby -e "puts RbConfig::CONFIG['configure_args']"
+      # - In:
+      #     $out/${passthru.libPath}/${stdenv.targetPlatform.system}/rbconfig.rb
+      #   Or (usually):
+      #     $(nix-build -A ruby)/lib/ruby/2.6.0/x86_64-linux/rbconfig.rb
+      # - In $out/lib/libruby.so and/or $out/lib/libruby.dylib
+      #
+      # Since some Gems require JIT support, there's probably no
+      # escape from this reference. Hence, it was decided to enable this
+      # feature by default, as it's enabled by default by ruby's ./configure
+      # script. If you'd like to have a ruby without reference to cc, setting
+      # jitSupport to false should remove all known references mentioned above.
+      , removeReferencesTo, jitSupport ? true
       , autoreconfHook, bison, autoconf
       , buildEnv, bundler, bundix
       , libiconv, libobjc, libunwind, Foundation
@@ -121,6 +132,7 @@ let
 
         configureFlags = ["--enable-shared" "--enable-pthread" "--with-soname=ruby-${version}"]
           ++ op useRailsExpress "--with-baseruby=${baseruby}/bin/ruby"
+          ++ op (!jitSupport) "--disable-jit-support"
           ++ op (!docSupport) "--disable-install-doc"
           ++ ops stdenv.isDarwin [
             # on darwin, we have /usr/include/tk.h -- so the configure script detects
@@ -157,11 +169,14 @@ let
           # Remove unnecessary groff reference from runtime closure, since it's big
           sed -i '/NROFF/d' $out/lib/ruby/*/*/rbconfig.rb
           ${
-            lib.optionalString removeReferenceToCC ''
+            lib.optionalString (!jitSupport) ''
               # Get rid of the CC runtime dependency
               ${removeReferencesTo}/bin/remove-references-to \
                 -t ${stdenv.cc} \
                 $out/lib/libruby*
+              ${removeReferencesTo}/bin/remove-references-to \
+                -t ${stdenv.cc} \
+                $out/${passthru.libPath}/${stdenv.targetPlatform.system}/rbconfig.rb
             ''
           }
           # Bundler tries to create this directory

pkgs/top-level/aliases.nix

@@ -501,6 +501,7 @@ mapAliases ({
   ruby_2_5_0 = throw "ruby_2_5_0 was deprecated on 2018-02-13: use a newer version of ruby";
   rubyPackages_2_4 = throw "rubyPackages_2_4 was deprecated in 2019-12: use a newer version of rubyPackages instead";
   rubygems = throw "rubygems was deprecated on 2016-03-02: rubygems is now bundled with ruby";
+  rubyMinimal = throw "rubyMinimal was removed due to being unused";
   rxvt_unicode-with-plugins = rxvt-unicode; # added 2020-02-02
   rxvt_unicode = rxvt-unicode-unwrapped; # added 2020-02-02
   urxvt_autocomplete_all_the_things = rxvt-unicode-plugins.autocomplete-all-the-things; # added 2020-02-02

pkgs/top-level/all-packages.nix

@@ -10545,19 +10545,6 @@ in
     ruby_2_6
     ruby_2_7;
 
-  rubyMinimal = ruby.override {
-    # gem support is minimal overhead
-    rubygemsSupport = true;
-    useRailsExpress = false;
-    zlibSupport = false;
-    opensslSupport = false;
-    gdbmSupport = false;
-    cursesSupport = false;
-    docSupport = false;
-    yamlSupport = false;
-    fiddleSupport = false;
-  };
-
   ruby = ruby_2_6;
   rubyPackages = rubyPackages_2_6;