Older gcc version (8, 9) do not support the -mtune=power10 flag. We should set this only when recent gcc versions are used.
------------- Commit messages: - JDK-8363910 Changes: https://git.openjdk.org/jdk/pull/26442/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26442&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8363910 Stats: 9 lines in 1 file changed: 7 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/26442.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/26442/head:pull/26442 PR: https://git.openjdk.org/jdk/pull/26442
