The new conformant preprocessor has been feature complete since Visual Studio 2019.
We should start to use it instead of the traditional preprocessor (which is well known to be non-conforming in various ways). This would bring VS-based usage more in line with other platforms in this area, and remove the need for some workarounds for the traditional preprocessor's behavior. This PR is dependent on [JDK-8293162](https://bugs.openjdk.org/browse/JDK-8293162) "Drop support for VS2017" and [JDK-8293088](https://bugs.openjdk.org/browse/JDK-8293088) "Fix compilation with the new Visual Studio preprocessor". ------------- Commit messages: - 8247283: Enable the new conformant preprocessor option in Visual Studio Changes: https://git.openjdk.org/jdk/pull/10101/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10101&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8247283 Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/10101.diff Fetch: git fetch https://git.openjdk.org/jdk pull/10101/head:pull/10101 PR: https://git.openjdk.org/jdk/pull/10101
