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hardened-ld - Online in the Cloud

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This is the command hardened-ld that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


hardened-ld - linker wrapper to enforce hardening toolchain improvements

SYNOPSIS


export DEB_BUILD_HARDENING=1

ld ...

DESCRIPTION


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.

ENVIRONMENT


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.

NOTES


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.

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