x86_64-pc-linux-gnu-gcc -std=gnu99 -Wall -Wextra -Werror -pedantic -march=native -O2 -pipe -g -Wl,-O1 -Wl,--as-needed fcgiwrap.c -lfcgi -o fcgiwrap
sed -i -e "s/-Werror//" configure.ac should remedy this issue.
sed -i -e "s/-Werror//" configure.ac \ || die "sed configure.ac failed" in src_prepare WFM x86_64-pc-linux-gnu-gcc -std=gnu99 -Wall -Wextra -pedantic -O2 -march=native -Wl,-O1 -Wl,--as-needed fcgiwrap.c -lfcgi -lsystemd-daemon -o fcgiwrap
I will fix this myself in 2 weeks.