cllesstag.dll — LessTag OpenCL backend (Windows x64)

The GPU LessTag detector. Requires a working OpenCL runtime and a usable device; if the machine has neither, use cpulesstag instead — this DLL will not even load without OpenCL.dll.

Install

Drop cllesstag.dll next to DetourLite.exe (or Detour.exe).

Selecting it

Priority, highest first:

1. the detector's own backend setting ("cl", "cpu", or "auto")
2. the legacy clVer = "cpu" setting, which still means "use the CPU backend"
3. the DETOUR_LESSTAG environment variable
4. discovery order — OpenCL first, CPU as the fallback

With backend = "auto" and this DLL present, OpenCL wins. Aliases: cl, cllesstag, opencl, gpu, cl1.2, cl2.0.

clDev still picks the device by name substring (default "HD"), and clVer still picks the kernel source (cl1.2 or cl2.0).

What changed in 1.1.0-hourglass

• Exports version_lesstag() so the host can report exactly which build is loaded. An older cllesstag.dll without this export still binds — it is reported as legacy rather than being rejected.
• read_confs (the lesstag_conf.txt reader) moved into its own translation unit shared with the CPU backend. No behavior change.
• The CPU path is still compiled into this DLL, so type="cpu" keeps working for existing configurations.

Verifying it loaded

Loaded lesstag backend cl from DetourCore.LocatorTypes.LessTagController+ClLessTagLibrary, version=cllesstag 1.1.0 (hourglass, ...)
NVIDIA GeForce RTX 3070 Ti Laptop GPU OpenCL 3.0 CUDA
Build program with cl1.2

The detector status line carries the backend name, e.g. [cl:HD/cl1.2 320x320 x0.500].