In JDK-8146403, I accidentally added a $(LOG_INFO) to the DTDBuilder command. The problem is that this command prints its generated output to stdout, which we pipe to a file. The LOG_INFO macro instead redirects this to /dev/null unless a high enough log level is active. Luckily, in JPRT and RE builds, we run with LOG=debug so the generation works, but for normal developer builds, it's currently broken.