test/jdk/com/sun/tools/jextract/jclang-ffi/TestJextractFFI.java

*** 108,117 ****
--- 108,118 ----
      public void jextractFFI() throws IOException, InterruptedException {
          List<String> command = List.of(jextract_cmd,
                  "-I", clang_header_path.toString(),
                  "-t", "clang",
                  "-d", CLANG_FFI_PATH,
+                 "-J-Djextract.debug=true",
                  "-J-Dlibclang.debug=true",
                  "-J-Djava.library.path=" + clang_lib_path.toString(),
                  "-J--module-path", "-J" + CLANG_JAR,
                  "-J--upgrade-module-path", "-J" + JCLANG_PATH,
                  clang_header_path