nixpkgs/pkgs/build-support/cc-wrapper/add-hardening
2016-03-06 00:14:55 +01:00

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hardeningFlags=(fortify stackprotector pic strictoverflow format relro bindnow)
hardeningFlags+=("${hardeningEnable[@]}")
hardeningCFlags=()
hardeningLDFlags=()
if [[ ! $hardeningDisable == "all" ]]; then
for flag in "${hardeningFlags[@]}"
do
if [[ ! "$hardeningDisable" =~ "$flag" ]]; then
case $flag in
fortify)
hardeningCFlags+=('-O2' '-D_FORTIFY_SOURCE=2')
;;
stackprotector)
hardeningCFlags+=('-fstack-protector-strong')
;;
pie)
hardeningCFlags+=('-fPIE')
hardeningLDFlags+=('-pie')
;;
pic)
hardeningCFlags+=('-fPIC')
;;
strictoverflow)
hardeningCFlags+=('-fno-strict-overflow')
;;
format)
hardeningCFlags+=('-Wformat' '-Wformat-security' '-Werror=format-security')
;;
relro)
hardeningLDFlags+=('-z relro')
;;
bindnow)
hardeningLDFlags+=('-z now')
;;
*)
echo "Hardening flag unknown: $flag"
;;
esac
fi
done
fi