CMake:根据操作系统和架构链接预编译库 [英] CMake: Link precompiled library depending on OS and architecture

问题描述

我有不同的第 3 方库(Windows/Linux/Mac，32/64 位)的预编译版本.它必须包含在项目文件中，以将其他系统上的编译要求保持在最低限度，因为我不能指望它在多年后可供下载.静态和动态版本都可用，但没有来源.

I have different, precompiled versions of a 3rd-party library (Windows/Linux/Mac, 32/64-bit). It must be included in the project files to keep the requirements for compilation on other systems to a minimum and because I cannot expect it to be available for download years later. Both static and dynamic versions are available but no source.

我应该如何在我的 CMakeLists.txt 中链接它，以便依赖的 main.cpp 在所有系统上编译?它可以在不同的 Linux 发行版上运行吗?

How should I link it in my CMakeLists.txt so that the dependent main.cpp compiles on all systems? Would it work on different Linux distributions?

CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
PROJECT(ExampleProject)
LINK_DIRECTORIES(${CMAKE_SOURCE_DIR}/libs)
ADD_EXECUTABLE(Test main.cpp)
TARGET_LINK_LIBRARIES(Test lib1_win32)

这适用于 Windows，但显然不考虑不同的操作系统和体系结构.我知道 LINK_DIRECTORIES 的替代品，这只是一个例子.

This works under Windows but obviously does not account for different operating systems and architectures. I know the alternatives to LINK_DIRECTORIES, this is just an example.

推荐答案

使用CMAKE_SYSTEM_NAME测试操作系统，使用CMAKE_SIZEOF_VOID_P测试是32位还是64位:

Use CMAKE_SYSTEM_NAME to test the operating system and CMAKE_SIZEOF_VOID_P to test wether it's 32 or 64 bits:

if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
    if (${CMAKE_SIZEOF_VOID_P} MATCHES "8")
        target_link_libraries(Test lib1_linux64)
    else()
        target_link_libraries(Test lib1_linux32)
    endif()
elseif (${CMAKE_SYSTEM_NAME} MATCHES "Windows")
    if (${CMAKE_SIZEOF_VOID_P} MATCHES "8")
        target_link_libraries(Test lib1_win64)
    else()
        target_link_libraries(Test lib1_win32)
    endif()
# ETC
endif()

顺便说一句，我的示例是针对 CMake 2.8，您必须针对 2.6 调整测试.

Btw, my example is for CMake 2.8, you'll have to adapt the tests for 2.6.

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