As a preparation to update harfbuzz in jdk11u-dev to the versions used in higher JDK (harfbuzz 2.7.2 / 2.8.0) increment the C++ version
for harfbuzz to C++11.
Some time later, the harfbuzz changes are backported.
This gives everybody time to make sure the compilers work with the C++11 flag, or system harfbuzz is used as a workaround.
Discussion and more details about the issue :