CMAKE找不到module（Windows）

cmake中find_package总是报找不到module HELLO

项目结构

主cmake文件：

cmake_minimum_required (VERSION 3.8)

project ("T5")

add_executable (T5   "SRC/main.c")
add_subdirectory(SRC)

SET(CMAKE_MODULE_PATH C:/Users/WKN/Desktop/T5/cmake)

SRC中的cmake文件：

SET(CMAKE_MODULE_PATH C:/Users/WKN/Desktop/T5/cmake)

FIND_PACKAGE(HELLO)
IF(HELLO_FOUND)   
    ADD_EXECUTABLE(hello main.c)   
    INCLUDE_DIRECTORIES(${HELLO_INCLUDE_DIR})  
    TARGET_LINK_LIBRARIES(hello ${HELLO_LIBRARY}) 
ENDIF(HELLO_FOUND) 

add_executable(main main.c)

cmake下的自定义module:

FIND_PATH(HELLO_INCLUDE_DIR hello.h C:/Users/WKN/Desktop/t3/src/hello.h)
find_library(HELLO_LIBRARIES NAMES hello PATH C:/Users/WKN/Desktop/t3/build/src/Debug)
IF (HELLO_INCLUDE_DIR AND HELLO_LIBRARY) 
    SET(HELLO_FOUND TRUE) 
ENDIF (HELLO_INCLUDE_DIR AND HELLO_LIBRARY) 
IF (HELLO_FOUND)   
    IF (NOT HELLO_FIND_QUIETLY)     
        message(STATUS "Found Hello: ${HELLO_LIBRARY}")
        message(STATUS "Found Hello: ${HELLO_LIBRARY}")
    ENDIF (NOT HELLO_FIND_QUIETLY) 
ELSE (HELLO_FOUND) 
   IF (HELLO_FIND_REQUIRED)     
   MESSAGE(FATAL_ERROR "Could not find hello library")  
   ENDIF (HELLO_FIND_REQUIRED) 
ENDIF (HELLO_FOUND)

但现在无论如何 FIND_PACKAGE(HELLO)这句总报错,无法找到HELL Omodule,我哪里写错了?
谢谢.

find_library(HELLO_LIBRARIES NAMES hello PATH C:/Users/WKN/Desktop/t3/build/src/Debug)
h文件怎么在debug目录下，是不是写错了