[openjdk22] build failure

[Bjarne D Mathiesen]

so, I'm on macOS 10.15.7 Catalina.
according to https://ports.macports.org/port/openjdk22/builds/ openjdk22
fails to install on anything lower than macOS 11 Big Sur.

when I try to build it, I get the following at the end of main.log :

==>
/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_java_openjdk22/openjdk22/main.log
<==
:info:build          ^~~~~~~~~~~~~~~
:info:build 1 error generated.
:info:build * For target hotspot_variant-server_tools_adlc_objs_output_h.o:
:info:build In file included from
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_java_openjdk22/openjdk22/work/jdk22u-jdk-22-ga/src/hotspot/share/adlc/output_h.cpp:26:
:info:build In file included from
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_java_openjdk22/openjdk22/work/jdk22u-jdk-22-ga/src/hotspot/share/adlc/adlc.hpp:33:
:info:build In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/iostream:37:
:info:build In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ios:215:
:info:build In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__locale:14:
:info:build In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string:504:
:info:build In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string_view:175:
:info:build In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__string:57:
:info:build In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:639:
:info:build In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/initializer_list:46:
:info:build
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cstddef:37:10:
fatal error: '__cxx_version' file not found
:info:build #include <__cxx_version>
:info:build          ^~~~~~~~~~~~~~~
:info:build 1 error generated.
:info:build * All command lines available in
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_java_openjdk22/openjdk22/work/jdk22u-jdk-22-ga/build/release/make-support/failure-logs.
:info:build === End of repeated output ===

if I interpret this correctly, a __cxx_version file is missing.
Q: how do I generate this ?
Q: where should it be located ?


-- 
Bjarne D Mathiesen
Slagelse ; Danmark ; Europa
-----------------------------------------------------------------------
denne besked er skrevet i et totalt M$-frit miljø
MacPro 2010 ; OpenCore + macOS 10.15.7 Catalina
2 x 3,46 GHz 6-Core Intel Xeon ; 192 GB 1333 MHz DDR3 ECC RDIMM
ATI Radeon RX 590 8 GB