Some details on how the IncludeCustomExtension hook is called will
change when JDK-8348190[1] is integrated. The PR is currently open for
reviewing on GitHub[2].
The big benefit of this change is that now the hooks will be
automatically generated, so it will be possible to add hooks to each and
every makefile without having to make any changes in the open JDK source
code. However, as a result of this, the hooks will always only appear
strictly before or after a makefile. While many of the current hooks are
positioned closed to the top or bottom of a file, not all are, and this
might change the behavior enough to render a pre-existing hook broken
and in need of fixing to keep working.
Furthermore, the names passed to IncludeCustomExtension have been
standardized to always end in -pre or -post, which was often, but not
always, the case before. Rename your hooks accordingly.
/Magnus
[1] https://bugs.openjdk.org/browse/JDK-8348190
[2] https://github.com/openjdk/jdk/pull/23399
