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-rw-r--r--spec/rubyspec/optional/capi/spec_helper.rb3
1 files changed, 1 insertions, 2 deletions
diff --git a/spec/rubyspec/optional/capi/spec_helper.rb b/spec/rubyspec/optional/capi/spec_helper.rb
index 5dbe6bbcac..3d8cb296a6 100644
--- a/spec/rubyspec/optional/capi/spec_helper.rb
+++ b/spec/rubyspec/optional/capi/spec_helper.rb
@@ -57,10 +57,9 @@ def compile_extension(name)
make = ENV['MAKE']
make ||= (RbConfig::CONFIG['host_os'].include?("mswin") ? "nmake" : "make")
- ENV.delete "MAKEFLAGS" # Fix make warning when invoked with -j in MRI
# Do not capture stderr as we want to show compiler warnings
- output = `#{make} V=1 DESTDIR=`
+ output = IO.popen([make, "V=1", "DESTDIR=", close_others: false], &:read)
raise "#{make} failed:\n#{output}" unless $?.success?
$stderr.puts output if debug