Libraries built with GCC-8 (rtools40):
Note that gpgme 1.12.0 has a weird bug that causes crashes on win64.
./bin executables are taken from the windows installers from the GPG download site.
gpgme-w32spawn.exe: extracted from "GnuPG modern" (gnupg-w32-2.2.12_20181214.exe)
iconv.dll: extracted from "GnuPG classic" (gnupg-w32cli-1.4.23.exe)
The client needs to manually set the path of
gpgme_set_global_flag("w32-inst-dir", "C://Program Files (x86)//GnuPG/bin");
See also dicussion: http://marc.info/?l=gnupg-devel&m=144604688823859&w=2