Added fallback for incomplete Poco distributions.

src/cli/CMakeLists.txt

@@ -13,7 +13,27 @@ target_include_directories(${PROJECT_NAME}-cli
   PRIVATE "${PROJECT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}")
 
 target_link_libraries(${PROJECT_NAME}-cli
-  PRIVATE ${PROJECT_NAME} Poco::Util)
+  PRIVATE ${PROJECT_NAME})
+
+# If no Poco*Config.cmake recipes are found, look for headers in standard dirs.
+if(PocoUtil_FOUND)
+  target_link_libraries(${PROJECT_NAME}-cli
+    PRIVATE Poco::Util)
+else()
+  find_file(Poco_h NAMES "Poco/Poco.h"
+    PATHS "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
+
+  if("${Poco_h}" STREQUAL "Poco_h-NOTFOUND")
+    message(FATAL_ERROR "Could not find POCO.")
+  else()
+    message(WARNING
+      "Your distribution of POCO doesn't contain the *Config.cmake recipes, "
+      "but the files seem to be in the standard directories. "
+      "Let's hope this works.")
+    target_link_libraries(${PROJECT_NAME}-cli
+      PRIVATE PocoUtil)
+  endif()
+endif()
 
 install(TARGETS ${PROJECT_NAME}-cli
   DESTINATION ${CMAKE_INSTALL_BINDIR})