A toolbox base on cxx20

Modern CPP first step: don't use macros

requirement:

linux: gcc version: gcc version 11 (experimental)

windows: MSVC 19

install/update gcc11

Linux/Unix

git clone https://github.com/gcc-mirror/gcc.git
cd gcc
./contrib/download_prerequisites
mkdir build && cd build
../configure --disable-multilib
make -j${cat /proc/cpuinfo | grep "processor" | wc -l}
sudo make install

# optional
cd ../..
rm -rf gcc

possible problem

/usr/lib64/libstdc++.so.6: version GLIBCXX_3.4.29 not found

sudo mv /usr/lib/x86_64-linux-gnu/libstdc++.so.6 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.bak

sudo ln -s /usr/local/lib64/libstdc++.so.6 /usr/lib/x86_64-linux-gnu/libstdc++.so.6
# command below
sudo cp /usr/local/lib64/libstdc++.so.6 /usr/lib/x86_64-linux-gnu/libstdc++.so.6 
# also work for me, recommend to use ln, only need to choose one way