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hardening-wrapper - Compiler wrapper to enable security hardening flags…  more info»

hardened-ld.1.gz

HARDENED-LD(1)            Debian GNU/Linux            HARDENED-LD(1)



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 cor‐
       rectly and needs to be disabled, the  corresponding  environ‐
       ment 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-wrap‐
       per.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.


SEE ALSO
       hardened-cc(1) ld(1)



Debian Project               2008-01-08               HARDENED-LD(1)
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