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hardening.cmake's Introduction

Hardening.cmake

Enables various mitigations. Position Independent Code (enables ASLR and is a prereq for sanitizers), DEP (for Windows), various mitigations against microarchitectural vulnrs that destroy performance ... stuff like this.

How to use

  1. Add this repo as a submodule into your repo.
  2. Point CMake to search for modules in it.
  3. include(Hardening)
  4. harden(<your target>)

hardening.cmake's People

Contributors

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Watchers

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hardening.cmake's Issues

clang bug is due to wrong invocation, not a bug!

Your supposed "clang bug" happens because you are not passing -pie to the linker driver (clang), but only the linker.

The linker driver is responsible for selecting the appropriate startup files, and since it sees no -pie it assumes non-pie startup files. Passing -pie to the linker driver will also forward it to the linker.

There's two reasons you may not have encountered this with gcc:

  1. gcc defaults to pie on most distributions.
  2. GNU ld may be configured to allow textrels by default

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