cmake 检测处理器体系结构

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已于 2022-08-25 15:33:10 修改 · 387 阅读

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#c++

于 2022-07-28 17:36:53 首次发布

本文介绍了如何在CMake中检测项目的处理器体系结构，这对于跨平台编译和优化至关重要。内容涉及CMake脚本和相关配置，以确保代码正确地针对不同架构进行编译。

code in git

# set minimum cmake version
cmake_minimum_required(VERSION 3.5 FATAL_ERROR)

# project name and language
project(recipe-04 LANGUAGES CXX)

# define executable and its source file
add_executable(arch-dependent arch-dependent.cpp)

# let the preprocessor know about the size of void *
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
  target_compile_definitions(arch-dependent PUBLIC "IS_64_BIT_ARCH")
  message(STATUS "Target is 64 bits")
else()
  target_compile_definitions(arch-dependent PUBLIC "IS_32_BIT_ARCH")
  message(STATUS "Target is 32 bits")
endif()

# let the preprocessor know about the host processor architecture
if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "i386")
  message(STATUS "i386 architecture detected")
elseif(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "i686")
  message(STATUS "