how to build the source of msys2-runtime in msys2 enviroment?

[liyqxtu]

how to build the source of msys2-runtime in msys2 enviroment?

[dscho]

This is more or less a duplicate of #316. Short story:

1. Install MSYS2
2. Run the msys2.exe program in the top-level directory
3. Install the build dependencies using pacman -Sy --noconfirm msys2-devel base-devel autotools cocom diffutils gcc gettext-devel libiconv-devel make mingw-w64-cross-crt mingw-w64-cross-gcc mingw-w64-cross-zlib perl zlib-devel xmlto docbook-xsl (see here)
4. Build:

   (cd winsup && ./autogen.sh)
   ./configure --disable-dependency-tracking --with-msys2-runtime-commit="$GITHUB_SHA"
   make -j8

5. "Install":

   make DESTDIR="$(pwd)"/_dest install

Now there is the new MSYS2 runtime in _dest/usr/bin/msys-2.0.dll.