CMAKE：链接到项目目录之外的本地构建的静态库

Question

我正在将几个项目转换为使用Cmake作为构建系统。这些项目之间有一些共享的库，我想与项目分开维护，这些项目统计地构建了应用程序和库。

所需的目录结构看起来像这样。

repos/
   common/
      LibA/
         CMakeLists.txt
       src/
          CMakeLists.txt
          <Lib sources>
       build/
          LibA.lib
     <other libs>
   AppA/
      CMakeLists.txt
      src/
          CMakeLists.txt
          <App sources>
      build/
         AppA.exe
   <other apps>

到目前为止，我制作的CMAKE文件是；

liba/cmakelists.txt

cmake_minimum_required (VERSION 3.8)

project ("LibA")

# Include sub-projects.
add_subdirectory ("src")

liba/src/cmakelists.txt

cmake_minimum_required (VERSION 3.8)

add_library(
    LibA STATIC
    "Animal.cpp" 
    "Animal.h" 
    "Dog.h" 
    "Dog.cpp"
)

set_property(TARGET LibA PROPERTY CXX_STANDARD 11)

cmake_minimum_required (VERSION 3.8)

project ("AppA")

# Include sub-projects.

add_subdirectory("../common/LibA" "build")

add_subdirectory ("src")

appa/cmakelists.txt appa/src/cmakelists.txt

cmake_minimum_required (VERSION 3.8)

add_executable( AppA
    main.cpp
)

target_link_libraries(AppA LibA)

set_property(TARGET AppA PROPERTY CXX_STANDARD 11)

使用此设置，APPA上的CMAKE成功，但是Main.cpp找不到Animal.H。

main.cpp

#include "Animal.h"

int main(int argc, char *argv[])
{


    Animal* ann = new Animal();
    ann->speak((char*)"Rawr");

    return 0;
}

我假设我在Appa的Cmake文件中没有正确链接到liba。不幸的是，我还找不到有关如何在项目统计上链接在项目子目录之外的任何好示例。