^CMake Error at ConfigCase\.cmake:4 \(target_link_libraries\):
  The link interface of target "iface" contains:

    config::iface-Debug

  but the target was not found.  Possible reasons include:
(
    \*[^
]+)*

Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
+
CMake Error at ConfigCase\.cmake:6 \(target_link_libraries\):
  Target "impl" links to:

    config::impl-Debug

  but the target was not found.  Possible reasons include:
(
    \*[^
]+)*

Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
