Adding the dependency of ccan-hash to the samba-util build target seems to fix the linker problems, I was facing while trying to build a debian package.
Created attachment 9373 [details] add ccan-hash to samba-util build target
ccan-hash was removed in 74e52a42a7b61d9d311d86d9896e4a2b73740fb9 for Samba 4.3