The new xlc17 compiler should be supported to build OpenJDK on AIX. This compiler, compared to the currently supported xlc16, has a significantly more recent clang (xlc 17.1.1 uses clang 15) included. 1. Because the frontend interface of the new compiler (c-flags, Ld-Flags) has changed from an xlc to a clang interface we decided to use the clang toolchain for the new xlc17 compiler. 2. Unfortunately, the system headers are mainly unchanged, so they do not harmonize with the src/hotspot/share/utilities/globalDefinitions_gcc.hpp which would be used if we totally switch to clang toolchain. So we keep the HOTSPOT_TOOLCHAIN_TYPE=xlc 3. In src/hotspot/share/utilities/globalDefinitions_xlc.hpp we introduce a new define AIX_XLC_GE_17 which is set if we build with the new xlc17 on AIX. This define will be used in following PRs.
------------- Commit messages: - JDK-8307349 Changes: https://git.openjdk.org/jdk/pull/13898/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13898&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8307349 Stats: 117 lines in 6 files changed: 97 ins; 1 del; 19 mod Patch: https://git.openjdk.org/jdk/pull/13898.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13898/head:pull/13898 PR: https://git.openjdk.org/jdk/pull/13898
