-PKG_SOURCE_URL:=http://alpha.gnu.org/gnu/bc \
- http://gnualpha.uib.no/bc/ \
- http://mirrors.fe.up.pt/pub/gnu-alpha/bc/ \
- http://www.nic.funet.fi/pub/gnu/alpha/gnu/bc/
+PKG_SOURCE_URL:=https://alpha.gnu.org/gnu/bc \
+ https://gnualpha.uib.no/bc/ \
+ https://mirrors.fe.up.pt/pub/gnu-alpha/bc/ \
+ https://www.nic.funet.fi/pub/gnu/alpha/gnu/bc/