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instance method
Gem::Ext::CargoBuilder#build_env
build_env
lib/rubygems/ext/cargo_builder.rb
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# File tmp/rubies/ruby-3.1.3/lib/rubygems/ext/cargo_builder.rb, line 37
def build_env
build_env = rb_config_env
build_env["RUBY_STATIC"] = "true" if ruby_static? && ENV.key?("RUBY_STATIC")
build_env["RUSTFLAGS"] = "#{ENV["RUSTFLAGS"]} --cfg=rb_sys_gem".strip
build_env
end
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