Enable compiler sanitizer flags.

The following sanitizers are supported:

  • Address Sanitizer

  • Memory Sanitizer

  • Thread Sanitizer

  • Leak Sanitizer

  • Undefined Behaviour Sanitizer

All of them are implemented in Clang, depending on your version, and there is an work in progress in GCC, where some of them are currently implemented.

This module will check your current compiler version to see if it supports the sanitizers that you want to enable


Simply add:


to your CMakeLists.txt. Note that this module is included in KDECompilerSettings, so projects using that module do not need to also include this one.

The sanitizers are not enabled by default. Instead, you must set ECM_ENABLE_SANITIZERS (either in your CMakeLists.txt or on the command line) to a semicolon-separated list of sanitizers you wish to enable. The options are:

  • address

  • memory

  • thread

  • leak

  • undefined

  • fuzzer

The sanitizers “address”, “memory” and “thread” are mutually exclusive. You cannot enable two of them in the same build.

“leak” requires the “address” sanitizer.


To reduce the overhead induced by the instrumentation of the sanitizers, it is advised to enable compiler optimizations (-O1 or higher).


This is an example of usage:

mkdir build
cd build
cmake -DECM_ENABLE_SANITIZERS='address;leak;undefined' ..


Most of the sanitizers will require Clang. To enable it, use:


Since 1.3.0.