Hi all, JBS: https://bugs.openjdk.java.net/browse/JDK-8247396 Webrev: http://cr.openjdk.java.net/~jiefu/8247396/webrev.00/
-O3 is used for clang on MacOS after JDK-8246751. But it breaks the builds of VMs with opt-size feature when PCH is enabled. The reason is that the PCH was built with -Os while some other files were built with -O3, which causes an error with clang. It would be better to disable the PCH for opt-size builds. Thanks a lot. Best regards, Jie