core/pkgs/build-support/lib/cmake.nix

{ stdenv, lib }:

let
  inherit (lib) findFirst isString optional optionals;

  cmakeFlags' = optionals (stdenv.hostPlatform != stdenv.buildPlatform) ([
    "-DCMAKE_SYSTEM_NAME=${
      findFirst isString "Generic"
      (optional (!stdenv.hostPlatform.isRedox) stdenv.hostPlatform.uname.system)
    }"
  ] ++ optionals (stdenv.hostPlatform.uname.processor != null)
    [ "-DCMAKE_SYSTEM_PROCESSOR=${stdenv.hostPlatform.uname.processor}" ]
    ++ optionals (stdenv.hostPlatform.uname.release != null)
    [ "-DCMAKE_SYSTEM_VERSION=${stdenv.hostPlatform.uname.release}" ]
    ++ optionals (stdenv.hostPlatform.isDarwin)
    [ "-DCMAKE_OSX_ARCHITECTURES=${stdenv.hostPlatform.darwinArch}" ]
    ++ optionals (stdenv.buildPlatform.uname.system != null)
    [ "-DCMAKE_HOST_SYSTEM_NAME=${stdenv.buildPlatform.uname.system}" ]
    ++ optionals (stdenv.buildPlatform.uname.processor != null)
    [ "-DCMAKE_HOST_SYSTEM_PROCESSOR=${stdenv.buildPlatform.uname.processor}" ]
    ++ optionals (stdenv.buildPlatform.uname.release != null)
    [ "-DCMAKE_HOST_SYSTEM_VERSION=${stdenv.buildPlatform.uname.release}" ]
    ++ optionals (stdenv.buildPlatform.canExecute stdenv.hostPlatform)
    [ "-DCMAKE_CROSSCOMPILING_EMULATOR=env" ]
    ++ optionals stdenv.hostPlatform.isStatic
    [ "-DCMAKE_LINK_SEARCH_START_STATIC=ON" ]);

  makeCMakeFlags = { cmakeFlags ? [ ], ... }: cmakeFlags ++ cmakeFlags';

in { inherit makeCMakeFlags; }