+case "${EnableCXXMode}" in
+--enable-cxx11|--enable-cxx-mode=11)
+ export CC=cc
+ export CXX="c++ -stdlib=libc++"
+ export CXXFLAGS=-std=c++11
+ ;;
+--enable-cxx-mode=17)
+ export CC=cc
+ export CXX="c++ -stdlib=libc++"
+ export CXXFLAGS=-std=c++17
+ ;;
+esac
+