The warning is brand-new in cmake 2.20, which is not officially released yet. See https://cmake.org/cmake/help/latest/policy/CMP0116.html#policy:CMP0116. You probably have an older cmake on your machine. Michael Am Do., 4. März 2021 um 14:44 Uhr schrieb Paul C. Anagnostopoulos via llvm-dev <llvm-dev at lists.llvm.org>:> > Well, I emerge from a week of getting my new Windows 10 machine running smoothly. Now I have to tackle the LLVM build. When I do a build, I get a boatload of the following messages. I searched my old machine for settings involving policies, with no luck. I don't recall seeing these when I started building LLVM on my old machine. As always, any help is appreciated and your patience duly noted. > > ------------------------------------- > > CMake Warning (dev) at C:/LLVM/llvm-project/llvm/cmake/modules/TableGen.cmake:94 (add_custom_command): > Policy CMP0116 is not set: Ninja generators transform DEPFILEs from > add_custom_command(). Run "cmake --help-policy CMP0116" for policy > details. Use the cmake_policy command to set the policy and suppress this > warning. > Call Stack (most recent call first): > C:/LLVM/llvm-project/mlir/cmake/modules/AddMLIR.cmake:2 (tablegen) > C:/LLVM/llvm-project/mlir/test/lib/Dialect/Test/CMakeLists.txt:28 (mlir_tablegen) > This warning is for project developers. Use -Wno-dev to suppress it. > > ---------------------------------------------- > > _______________________________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev