Build script:
sed '1938,1980d' -i configure.ac
sed '161s/ \$(LIBS)//' -i Makefile.in
autoconf; autoheader
./configure --without-stackprotect
sed '44,45d' -i bufaux.c
make sftp-server
mkdir -p $1/usr/libexec/
mv sftp-server $1/usr/libexec/