Trying to install this on raspi stretch but keep getting a compiler error: checking build system type... armv7l-unknown-linux-gnueabihf checking host system type... armv7l-unknown-linux-gnueabihf checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... no checking for mawk... mawk checking whether make sets $(MAKE)... yes checking whether make supports nested variables......