openjdk8: fix initial build errors on powerpc

[barracuda156]

Description

CI failures seem irrelevant. All changes are for powerpc, and I have no intention to change anything for any other archs.

This fixes a number of errors which break the build in its early stages. I kept all patches restricted to PowerPC, so revbump should not be needed: changes for other systems are non-functional.

P. S. PPC32 has been used since openjdk/jdk8u@036382c and still used in the current code https://github.com/openjdk/jdk8u/blob/6b53212ef78ad50f9eede829c5ff87cadcdb434b/hotspot/src/os_cpu/bsd_zero/vm/os_bsd_zero.hpp#L39

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS 10.6
Xcode 3.2

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL in commit message?
• checked your Portfile with port lint --nitpick?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?
• checked that the Portfile's most important variants haven't been broken?

[macportsbot]

Notifying maintainers:
@usersxx for port openjdk8.

[barracuda156]

Actually wait with merging this, I think I will get it to build as headless.

P. S. The main issue is that source is horribly written, and neither existing nor earlier version of the code works correctly: what we set in configure to ”disable headful” does nothing. It was allegedly addressed in JDK9, however backporting did not work either, or maybe some other commit was needed.
Anyway, I am tired of this pending and will try to sort it in a day or two.

[reneeotten]

Feel free to reopen once you this is all done.