From 5e814ea91286070fb3031f2cb1014658539eb1c7 Mon Sep 17 00:00:00 2001
From: KOBAYASHI Shuji <shuujii@gmail.com>
Date: Fri, 5 Feb 2021 18:35:44 +0900
Subject: Define `MRB_NO_GEMS` if `disable_libmruby` is specified

---
 lib/mruby/build.rb | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/lib/mruby/build.rb b/lib/mruby/build.rb
index a79732802..bf0554578 100644
--- a/lib/mruby/build.rb
+++ b/lib/mruby/build.rb
@@ -350,11 +350,7 @@ EOS
     def define_rules
       use_mrdb = @gems["mruby-bin-debugger"]
       compilers.each do |compiler|
-        if respond_to?(:enable_gems?) && enable_gems?
-          compiler.defines -= %w(MRB_NO_GEMS)
-        else
-          compiler.defines += %w(MRB_NO_GEMS)
-        end
+        compiler.defines << "MRB_NO_GEMS" unless enable_gems? && libmruby_enabled?
         compiler.defines |= %w(MRB_USE_DEBUG_HOOK) if use_mrdb
       end
       [@cc, *(@cxx if cxx_exception_enabled?)].each do |compiler|
-- 
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