One more important note about compiling software with MSYS2 is that the msys2 version of cygwin1.dll (i forget how it&#x27;s renamed) obviously inherits the same license as cygwin1.dll. Cygwin1.dll is <i>not</i> LGPL. It is <i>GPL</i>. So any program you release compiled with MSYS2 inherits GPL virality, unless you pay Red Hat for a commercial Cygwin license.