[knot-dns-users] Troubles compiling Knot 2.1

Hi, I’m trying to compile Knot 2.1, but it fails. Here is the error part: libtool: compile: gcc -DHAVE_CONFIG_H -I. -I../../src -include ../../src/config.h -I./shared -I./lib -I./lib/dnssec -I../../src -I/usr/include/p11-kit-1 -fvisibility=hidden -D_FORTIFY_SOURCE=2 -march=native -O2 -pipe -fstack-protector-strong -fstack-check -Wall -Werror=format-security -Werror=implicit -fpredictive-commoning -MT lib/event/action/libdnssec_la-initial_key.lo -MD -MP -MF lib/event/action/.deps/libdnssec_la-initial_key.Tpo -c lib/event/action/initial_key.c -fPIC -DPIC -o lib/event/action/.libs/libdnssec_la-initial_key.o lib/binary.c: In function 'base64_decode_raw': lib/binary.c:47:2: warning: statement with no effect [-Wunused-value] nettle_len dst_size = dst_max_size; ^ lib/binary.c:47:13: error: expected ';' before 'dst_size' nettle_len dst_size = dst_max_size; ^ lib/binary.c:48:50: error: 'dst_size' undeclared (first use in this function) int result = nettle_base64_decode_update(&ctx, &dst_size, dst, src_len, src); ^ lib/binary.c:48:50: note: each undeclared identifier is reported only once for each function it appears in lib/binary.c:54:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ I suppose this has to do with the flags used on my system (Arch Linux) ? Thanks, Bruno