Provided by: hardening-wrapper_2.5ubuntu2_amd64
hardened-ld - linker wrapper to enforce hardening toolchain improvements
export DEB_BUILD_HARDENING=1 ld ...
The hardened-ld wrapper is normally used by calling ld as usual with DEB_BUILD_HARDENING set to 1. It will configure the necessary toolchain hardening features. By default, all features are enabled. If a given feature does not work correctly and needs to be disabled, the corresponding environment variables mentioned below can be set to 0.
DEB_BUILD_HARDENING=1 Enable hardening features. DEB_BUILD_HARDENING_DEBUG=1 Print the full resulting gcc command line to STDERR before calling gcc. DEB_BUILD_HARDENING_RELRO=0 Don't mark ELF sections read-only after start. See README.Debian for details. DEB_BUILD_HARDENING_BINDNOW=0 Don't mark ELF loader for start-up dynamic resolution. See README.Debian for details.
System-wide settings can be added to /etc/hardening-wrapper.conf, one per line. The real ld is renamed ld.real, and a diversion is registered with dpkg-divert(1). Thus hardened-ld's idea of the default ld is dictated by whatever package installed /usr/bin/ld.