v3.8.1
Merge pull request #2632 from stoeckmann/cygwin_definition
Fix -Werror=warning error and wrap some INSTALL directives with an ENABLE_INSTALL guard (#2397)
Convert the tools and respective tests to SPDX (#2317)
Fix format strings (#2457)
Fix a Y2038 bug by replacing `Int32x32To64` with regular multiplication (#2471)
Fix #endif comments for header guards (#2567)