Inspired by (the later backed-out) [JDK-8296115](https://bugs.openjdk.org/browse/JDK-8296115), I propose to enable `-Wpedantic` for clang. This has already found some irregularities in the code, like mistakenly using `#import` instead of `#include`. In this patch, I disable warnings for these individual buggy or badly written files, but I intend to post follow-up issues on the respective teams to have them properly fixed.
Unfortunately, it is not possible to enable `-Wpedantic` on gcc, since individual warnings in `-Wpedantic` cannot be disabled. This means that code like this: #define DEBUG_ONLY(code) code; DEBUG_ONLY(foo()); will result in a `; ;`. This breaks the C standard, but is benign, and we use it all over the place. On clang, we can ignore this by `-Wno-extra-semi`, but this is not available on gcc. ------------- Commit messages: - 8325163: Enable -Wpedantic on clang Changes: https://git.openjdk.org/jdk/pull/17687/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17687&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8325163 Stats: 43 lines in 11 files changed: 31 ins; 0 del; 12 mod Patch: https://git.openjdk.org/jdk/pull/17687.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/17687/head:pull/17687 PR: https://git.openjdk.org/jdk/pull/17687
