CMake：链接到具有依赖关系的导入库失败 [英] CMake: Linking to an imported library with dependencies fails

问题描述

我有一个CMakeLists.txt的子目录，应该使用make编译库并将结果作为导入的库导出到父目录：

  set（static_lib $ {CMAKE_CURRENT_BINARY_DIR} /lib/mylib.a）
 
 add_custom_command（
 WORKING_DIRECTORY $ {CMAKE_CURRENT_SOURCE_DIR} 
 OUTPUT $ {static_lib} 
 COMMAND make 
 COMMAND make install PREFIX = $ {CMAKE_CURRENT_BINARY_DIR} 
）
 
 add_custom_target（compile_mylib DEPENDS $ {static_lib}）
 
 add_library（mylib STATIC IMPORTED）
 set_property（TARGET mylib PROPERTY IMPORTED_LOCATION $ {static_lib}）
 add_dependencies（mylib compile_mylib）
  

b $ b

父目录中的CMakeLists.txt如下所示：

  add_subdirectory（deps / mylib）
 add_executable（mybin source.c）
 target_link_libraries（mybin mylib）
  

工作正常 - 但如果我编译相同的Ubuntu似乎忽略子目录的CMakeLists和抱怨：

  / usr / bin /ld.bfd.real：找不到-lmylib 
  

我使用Clang进行编译。解决方案是将GLOBAL添加到您的add_library调用中，以使其对父CMakeLists.txt可见

$ b $ b

I have a subdirectory with a CMakeLists.txt which should compile a library using make and export the result as an imported library to the parent directory:

set(static_lib ${CMAKE_CURRENT_BINARY_DIR}/lib/mylib.a)

add_custom_command(
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
    OUTPUT ${static_lib}
    COMMAND make
    COMMAND make install PREFIX=${CMAKE_CURRENT_BINARY_DIR}
)

add_custom_target(compile_mylib DEPENDS ${static_lib})

add_library(mylib STATIC IMPORTED)
set_property(TARGET mylib PROPERTY IMPORTED_LOCATION ${static_lib})
add_dependencies(mylib compile_mylib)

The CMakeLists.txt in the parent directory looks like this:

add_subdirectory(deps/mylib)
add_executable(mybin source.c)
target_link_libraries(mybin mylib)

On OSX this works just fine - but if I compile the same on Ubuntu it seems to ignore the subdirectory's CMakeLists and complains:

/usr/bin/ld.bfd.real: cannot find -lmylib

I'm using Clang for compilation.

解决方案

The solution is to add GLOBAL to your add_library call so that it is visible to the parent CMakeLists.txt

这篇关于CMake：链接到具有依赖关系的导入库失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！