在CMake中向库中添加标头

Question

我有很多库看起来像这样:

libs

     \lib1-- src
          \- include

      \lib2--src
           \- include

lib2需要lib1.我这样做的方法是做这样的事情:

lib2/CMakeLists.txt: 
    include ../lib1/include
    target_link_libraries(lib2 lib1)

如何在lib2库中包含lib1头/包含文件？我目前正在尝试这样做,但在编译期间我得到的错误是lib2无法找到lib1头文件.

libs/CMakeLists.txt:

file(GLOB lib1_src
    "lib1/src/*.cc"
 )

#header files
file (GLOB lib1_h
    "lib1/include/*.h"
 )


file(GLOB lib2_src
    "lib2/src/*.cc"
 )

#header files
file (GLOB lib2_h
    "lib2/include/*.h"
 )

add_library(lib1 ${lib1_src} ${lib1_h})
add_library(lib2 ${lib2_src} ${lib2_h})
target_link_libraries(lib2 lib1)

我可以通过添加include_directories(lib1/include)到它来使它工作,libs/CMakeLists.txt但我已经到了一个库需要3个其他的,每个需要3个其他的等等,并且它变得非常乏味.

Answer 1

当你有一个这样的重复文件夹结构时,创建一个自动化这种东西的宏通常很方便.

MACRO(ADD_SUBLIB libname)
  #Compute required sources
  file(GLOB sublib_sources "${libname}/src/*.cc")

  #Create library
  ADD_LIBRARY(${libname} SHARED ${sublib_sources})

  #add this library's header folder to the global include set
  INCLUDE_DIRECTORIES("${libname}/include")

ENDMACRO(ADD_SUBLIB)

#Call macro once per library
ADD_SUBLIB(lib1)
ADD_SUBLIB(lib2)
ADD_SUBLIB(lib3)

#Sample executable, who as a side effect of the macro calls will 
# be able to include.
ADD_EXECUTABLE(myprog main.cpp)

#Link any of the created libraries
TARGET_LINK_LIBRARIES(myprog lib1 lib2 lib3)