Make C++ code require C++17
Currently the C++ standard version is set in the head CMake file, but it
doesn't require the version to be available. Due to this, CMake will not
actually pass -std=c++17
to g++
.
This commit fixes the above issue by marking all targets using C++ to require C++17, but will not actually set this requirement at top level, as C++ is not a requirement for using KleidiAI
Signed-off-by: Emil Ohlsson emil.ohlsson@arm.com