x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -Wall -Werror -DPKGLIBEXECDIR=\"/usr/libexec/neatx\" -march=native -O2 -g0 -pipe -c -o fdcopy.o `test -f 'src/fdcopy.c' || echo './'`src/fdcopy.c x86_64-pc-linux-gnu-gcc -Wall -Werror -DPKGLIBEXECDIR=\"/usr/libexec/neatx\" -march=native -O2 -g0 -pipe -Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu -o src/fdcopy fdcopy.o
Thanks, I removed this offending -Werror from current releases in tree!