change install directory to /opt

lib/CMakeLists.txt

@@ -38,7 +38,7 @@ if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
 	target_link_libraries(tess_static m.a)
 endif()
 
-# 库的安装命令
+# 库的安装命令 安装到/opt/lib
 if(WIN32)
 	install(TARGETS tess DESTINATION lib)
 	install(TARGETS tess_static DESTINATION lib)
@@ -50,5 +50,5 @@ endif()
 
 # 头文件安装命令
 file(GLOB LIBTESS_HEAD *.h)
-
+# 安装到/opt/include/tess
 install(FILES ${LIBTESS_HEAD} DESTINATION include/tess)