Factsheet
Offline installer for mingw-w64
Where to download Mingw?
installation - How to install MinGW 64 on Windows 10 - Stack Overflow
c++ - Installing the latest version of mingw-w64 on Windows - Stack Overflow
Videos
Download web installer from here: http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/mingw-builds/installer/mingw-w64-install.exe/download
You can get a MinGW-w64 build that requires no installation from http://winlibs.com/, just extract the archive and start using it. The site also explains how to use the compiler from Code::Blocks IDE.
GCC 10 is officially released. The personal build for Windows (MinGW-w64) that can be downloaded from https://winlibs.com requires no installation, just extract to a folder.
Building GCC on Windows from source code is very difficult and cannot be recommended to beginners. Moreover, GCC 10 has not yet been officially released and you may need to wait a few more weeks to get it.
If you want an up-to-date GCC in Windows (currently version 9.3), I recommend downloading and installing the MSYS2 package. Once you install it, launch it using the "MinGW64" icon and install the correct compiler in the terminal. For details, see this question: How to install MinGW-w64 and MSYS2?
Once you have done this, you can forget about MSYS2 and simply use the directory with the binaries in your PATH.
The maintainers of MSYS2 are very keen in supporting bleeding edge software, so once GCC 10 is released, you will be able to update to it (using the command pacman -Syu)
very soon.
