fix: 修正缺失构建平台的错误

CMakeLists.txt

@@ -12,6 +12,9 @@ option(DR_COMPILE_CHECK  "Build compile-compatibility tests for each Cortex-M va
 set(DR_SOURCES  ${CMAKE_CURRENT_SOURCE_DIR}/datarouter.c  CACHE INTERNAL "")
 set(DR_INCLUDES ${CMAKE_CURRENT_SOURCE_DIR}               CACHE INTERNAL "")
 
+# 预编译包使用者可用 find_package(DataRouter CONFIG) 从此路径加载
+set(DataRouter_CMAKE_CONFIG_DIR ${CMAKE_CURRENT_SOURCE_DIR}/lib/cmake CACHE INTERNAL "")
+
 # ── 编译兼容性矩阵 (仅在 host 编译器和 ARM GCC 均可用时生效) ──
 
 if(DR_COMPILE_CHECK)
@@ -58,7 +61,6 @@ endif()
 add_library(DataRouter STATIC datarouter.c)
 target_include_directories(DataRouter PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 
 if(BUILD_EXAMPLES OR NOT DEFINED BUILD_EXAMPLES)