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nixpkgs/pkgs/tools/security/afl/README.md

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Updating the QEMU patches

When updating to the latest American Fuzzy Lop, make sure to check for any new patches to qemu for binary fuzzing support:

https://github.com/mirrorer/afl/tree/master/qemu_mode

Be sure to check the build script and make sure it's also using the right QEMU version and options in qemu.nix:

https://github.com/mirrorer/afl/blob/master/qemu_mode/build_qemu_support.sh

afl-config.h and afl-qemu-cpu-inl.h are part of the afl source code, and copied from config.h and afl-qemu-cpu-inl.h appropriately. The QEMU patches need to be slightly adjusted to #include these files (the patches try to otherwise include files like ../../config.h which causes the build to fail). See qemu.nix for details.