cmake:Cannot specify include directories for imported target

10km

发布于 2019-05-25 21:32:46

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发布于 2019-05-25 21:32:46

文章被收录于专栏：10km的专栏10km的专栏

问题描述

当使用INTERFACE选项调用target_include_directories命令向IMPORTED

target添加include文件夹时会报如题的错误，过程描述：

# 创建一个imported target MyLib
add_library(MyLib SHARED IMPORTED)
set_property(TARGET MyLib PROPERTY IMPORTED_LOCATION mylib.dll)
set_property(TARGET MyLib PROPERTY IMPORTED_IMPLIB mylib.lib)
# 然后添加INTERFACE类型的include
target_include_directories(MyLib INTERFACE mylib/include)
# 就会报错：
# Cannot specify include directories for imported target "MyLib".

解决方案

这个问题严格来说不算是个bug,只能说是cmake的规则设计不合理，不允许对imported target调用target_include_directories命令，在cmake 3.11之前所有版本中都存在。

很早就有报告：https://cmake.org/Bug/view.php?id=15689

解决的办法就是改用set_property或set_target_properties修改INTERFACE_INCLUDE_DIRECTORIES属性，如下：

# set_property设置INTERFACE_INCLUDE_DIRECTORIES 是可以的
set_property(TARGET MyLib APPEND PROPERTY INTERFACE_INCLUDE_DIRECTORIES mylib/include)
# 或者set_target_properties也是可以的：
set_target_properties(MyLib PROPERTIES  INTERFACE_INCLUDE_DIRECTORIES mylib/include)