The AIX build process encountered an issue related to disk detection. Initially, it erroneously determined that the build was not on a local disk, now it throws the following error, and always concludes that it's local:

checking if build directory is on local disk... /home/hotspot/openjdk/jdk/build/.configure-support/generated-configure.sh: line 156403: /opt/freeware/bin/df -T local > /dev/null 2>&1: No such file or directory
yes