Dear Matthias, Thank you for reporting the rrep ftbfs with GCC-9.
The build failed because GCC-9 has the --as-needed flag enabled by default and misses libacl references present in libgnu.a. Simply reordering the LDADD libraries in Makefile.am fixes this bug. I uploaded rrep_1.3.6-2 to mentors: https://mentors.debian.net/package/rrep The changeset is very small and I am looking for a sponsor. Regards, Arno