The `LOONGARCH` is not a macro that must be defined. It is not a C/C++ pre-defined macro and is also not pre-defined in libraries such as libffi. We'd better use a macro defined in jdk.
------------- Commit messages: - 8315020: The macro definition for LoongArch64 zero build is not accurate. Changes: https://git.openjdk.org/jdk/pull/15428/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15428&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8315020 Stats: 3 lines in 2 files changed: 2 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/15428.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15428/head:pull/15428 PR: https://git.openjdk.org/jdk/pull/15428
