[jdk11u-dev] RFR: 8348597: Update HarfBuzz to 10.4.0

Antonio Vieiro duke at openjdk.org
Fri Apr 25 08:55:47 UTC 2025


Backport of [JDK-8348597](https://bugs.openjdk.org/browse/JDK-8348597) from JDK17 that updates HarfBuzz to 10.4.0 (which [improves drawing performande by 10+% and includes different build fixes](https://newreleases.io/project/github/harfbuzz/harfbuzz/release/10.4.0)). Backport is not clean because it required adapting `make/lib/Awt2dLibraries.gmk` to fit JDK11.

Even though the backport built correctly, the resulting `jdk/lib/libfontmanager.so` contained undefined symbols that caused Swing tests to fail with `UnsatisfiedLinkError`. This is because JDK11 is missing [JDK-8334964](https://bugs.openjdk.org/browse/JDK-8334964) that excludes hb-subset from compilation, so this is also included as the second commit in the pull request.

While at it, a third commit adds an additional `-Wno-attributes` flag to `HARFBUZZ_DISABLED_WARNINGS_CXX_gcc`, restoring the capability to build JDK11 on Linux with `gcc-4.8.5`  (this is an old version of gcc, dating from 2015, but it's still the system gcc version in RHEL-7).

Tested 

- on Windows 10 with `jdk:jfc_demo`. 
- on Linux with `jdk:jfc_demo`, with 
    - `gcc 4.8.5/harfbuzz-1.7.5 (x86_64 & s390x)`, 
    - `gcc 8.5.0/harfbuzz-1.7.5 (x86_64)`, 
    - `gcc 11.5.0/harfbuzz-2.7.4 (x86_64)` 
    - and `gcc 14.2.1/harfbuzz-9.0.0 (x86_64)`

with both `--with-harfbuzz=system` and `--with-harfbuzz=bundled`.

-------------

Commit messages:
 - Additional "attributes" flag for Linux/GCC 4.8.5
 - Backport f4e99de33e35826ec1fb368d6ad96005d7bd5cc4
 - Backport ba3db307dceb41e48014451873fdf4db3816a537

Changes: https://git.openjdk.org/jdk11u-dev/pull/3026/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=3026&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8348597
  Stats: 18585 lines in 193 files changed: 10029 ins; 2990 del; 5566 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/3026.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/3026/head:pull/3026

PR: https://git.openjdk.org/jdk11u-dev/pull/3026


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