https://git.ruby-lang.org/ruby.git/commit/?id=b536ac2cd0

From b536ac2cd085a7f14b91959c1a8e8d7db43f1c4a Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sat, 16 Jul 2022 11:22:36 +0900
Subject: test-bundled-gems.rb needs `+` with GNU make

This script runs `make` internally, and sub-`make`s need the
environment variable for the job server when compiling in parallel.
---
 common.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common.mk b/common.mk
index f1764ef9ea..268ca0a86e 100644
--- a/common.mk
+++ b/common.mk
@@ -1408,7 +1408,7 @@ no-test-bundled-gems: https://github.com/ruby/ruby/blob/trunk/common.mk#L1408
 
 BUNDLED_GEMS =
 test-bundled-gems-run: $(PREPARE_BUNDLED_GEMS)
-	$(Q) $(XRUBY) $(tooldir)/test-bundled-gems.rb $(BUNDLED_GEMS)
+	$(gnumake_recursive)$(Q) $(XRUBY) $(tooldir)/test-bundled-gems.rb $(BUNDLED_GEMS)
 
 test-bundler-precheck: $(TEST_RUNNABLE)-test-bundler-precheck
 no-test-bundler-precheck:
-- 
cgit v1.2.1


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