Question

我的项目结构如下：

Libs/
Apps1/
Apps2/

每个文件夹中都有一个CMakeLists.txt。我想为每个文件夹生成一个项目文件，每个AppsN引用Libs。我这样做的方法是调用CMake的add_subdirectory(../Libs/Source/LibN)等。

现在，当我这样做时，CMake说add_subdirectory必须为二进制输出文件夹指定一个唯一的绝对路径。

见这篇文章：

Xcode dependencies across different build directories?

当构建输出文件夹对每个目标唯一时，

XCode 无法处理依赖关系。它需要一个文件夹。并且CMake默认执行此操作，它只是在文件夹不是子目录时拒绝。

我尝试在创建目标后更改和更改输出路径。这会将对象构建到输出文件夹，XCode会看到它们，但是CMake脚本中对此目标的所有引用都将使用唯一路径。

建议的解决方案是：

在App1/Projects/Subdir中包含项目文件，在不相关的位置包含重复的项目
将我的文件夹重新组织到一个共享的父文件夹，以避免这种CMake疯狂，这给我带来了一些安全问题（因为一些目录不公开）
从不通过其CMake名称引用目标，而是使用共享路径名称。不确定如何正确地做到这一点
尝试以某种方式在CMake侧修补
切换到预制

Answer 1

尝试将以下内容添加到根CMakeLists.txt：

CMAKE_MINIMUM_REQUIRED(VERSION 2.8.0)
PROJECT (ContainerProject)

SET (LIBRARY_OUTPUT_PATH ${ContainerProject_BINARY_DIR}/bin CACHE PATH
  "Single output directory for building all libraries.")
SET (EXECUTABLE_OUTPUT_PATH ${ContainerProject_BINARY_DIR}/bin CACHE PATH
  "Single output directory for building all executables.")
MARK_AS_ADVANCED(LIBRARY_OUTPUT_PATH EXECUTABLE_OUTPUT_PATH)

# for common headers (all project could include them, off topic)
INCLUDE_DIRECTORIES(ContainerProject_SOURCE_DIR/include)

# for add_subdirectory:
# 1) do not use relative paths (just as an addition to absolute path),
# 2) include your stuffs in build order, so your path structure should
#    depend on build order,
# 3) you could use all variables what are already loaded in previous
#    add_subdirectory commands.
#
# - inside here you should make CMakeLists.txt for all libs and for the
# container folders, too.
add_subdirectory(Libs)

# you could use Libs inside Apps, because they have been in this point of
# the script
add_subdirectory(Apps1)
add_subdirectory(Apps2)

Libs CMakeLists.txt：

add_subdirectory(Source)

Source CMakeLists.txt：

add_subdirectory(Lib1)
# Lib2 could depend on Lib1
add_subdirectory(Lib2)

通过这种方式，所有Apps都可以使用所有库。所有二进制文件都将生成二进制文件${root}/bin。

示例lib：

PROJECT(ExampleLib)
INCLUDE_DIRECTORIES(
  ${CMAKE_CURRENT_BINARY_DIR}
  ${CMAKE_CURRENT_SOURCE_DIR}
)
SET(ExampleLibSrcs
  ...
)
ADD_LIBRARY(ExampleLib SHARED ${ExampleLibSrcs})

示例可执行文件（具有依赖性）：

PROJECT(ExampleBin)
INCLUDE_DIRECTORIES(
  ${CMAKE_CURRENT_BINARY_DIR}
  ${CMAKE_CURRENT_SOURCE_DIR}
  ${ExampleLib_SOURCE_DIR}
)
SET(ExampleBinSrcs
  ...
)
# OSX gui style executable (Finder could use it)
ADD_EXECUTABLE(ExampleBin MACOSX_BUNDLE ${ExampleBinSrcs})
TARGET_LINK_LIBRARIES(ExampleBin
  ExampleLib
)

Here is a stupid and working example.

如何解决CMake + XCode 4路径依赖？

1 个答案: