1 files changed, 41 insertions, 0 deletions
diff --git a/spec/install/gems/native_extensions_spec.rb b/spec/install/gems/native_extensions_spec.rb
index 7a43252f84..25f2d1e07d 100644
--- a/spec/install/gems/native_extensions_spec.rb
+++ b/spec/install/gems/native_extensions_spec.rb
@@ -87,4 +87,45 @@ RSpec.describe "installing a gem with native extensions", :ruby_repo do
     run! "Bundler.require; puts CExtension.new.its_true"
     expect(out).to eq("true")
   end
+
+  it "install with multiple build flags" do
+    build_git "c_extension" do |s|
+      s.extensions = ["ext/extconf.rb"]
+      s.write "ext/extconf.rb", <<-E
+        require "mkmf"
+        name = "c_extension_bundle"
+        dir_config(name)
+        raise "OMG" unless with_config("c_extension") == "hello" && with_config("c_extension_bundle-dir") == "hola"
+        create_makefile(name)
+      E
+
+      s.write "ext/c_extension.c", <<-C
+        #include "ruby.h"
+
+        VALUE c_extension_true(VALUE self) {
+          return Qtrue;
+        }
+
+        void Init_c_extension_bundle() {
+          VALUE c_Extension = rb_define_class("CExtension", rb_cObject);
+          rb_define_method(c_Extension, "its_true", c_extension_true, 0);
+        }
+      C
+
+      s.write "lib/c_extension.rb", <<-C
+        require "c_extension_bundle"
+      C
+    end
+
+    bundle! "config build.c_extension --with-c_extension=hello --with-c_extension_bundle-dir=hola"
+
+    install_gemfile! <<-G
+      gem "c_extension", :git => #{lib_path("c_extension-1.0").to_s.dump}
+    G
+
+    expect(out).not_to include("extconf.rb failed")
+
+    run! "Bundler.require; puts CExtension.new.its_true"
+    expect(out).to eq("true")
+  end
 end