configure: WARNING: default fixed-point math will yield limited accuracy
frame.c:147:21: warning: comparison of constant 4 with expression of type 'enum mad_layer' is always false [-Wtautological-constant-out-of-range-compare]
  if (header->layer == 4) {
      ~~~~~~~~~~~~~ ^  ~
1 warning generated.
ar: `u' modifier ignored since `D' is the default (see `U')
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY