values):
o --enable-cxx-mode=VALUE can be used to select a C++ standard, for
- example --enable-cxx-mode=11. The default is to try C++14, and then
- C++11.
+ example --enable-cxx-mode=11. The default is to try C++17, C++14, and
+ C++11, in this order.
o --enable-optimization=VALUE enables you to set optimization to a
higher level than the default, for example --enable-optimization=-O3.