at https://github.com/Gnucash/gnucash/commit/2a42078e (commit) commit 2a42078e9a6ca920a342264b5caf4c8571316cbd Author: John Ralls <jralls at ceridwen.us> Date: Sat May 30 15:18:18 2020 -0700 Prevent libstdc++ copysign declaration error on Win32.