Hello,how to download and install 2.4 with Msys2. when I tried to do it I have this error :$ pacman -U ftp://ftp.gnu.org/gnu/libtool/libtool-2.4.tar.gz
 libtool-2.4.tar.gz                                                                          2.5 MiB   681K/s 00:04 [####################################################################] 100%
 libtool-2.4.tar.gz.sig                                                                     72.0   B   289B/s 00:00 [####################################################################] 100%
loading packages...
:: Import PGP key 1024D/CFE2BE707B538E8B26757D84151308092983D606, "Gary V. Vaughan <gary@gnu.org>", created: 2003-11-12? [Y/n] y
error: '/var/cache/pacman/pkg/libtool-2.4.tar.gz': invalid or corrupted package (PGP signature)

Best regards 


Dr. Habiba DAHMANIMohamed Boudiaf UniversityM'sila, Algeria