CMake语法—打印帮助（CMakePrintHelpers）

目录

CMake语法—打印帮助（CMakePrintHelpers）

1 CMakePrintHelpers

1.1 cmake_print_variable

1.1.1 定义
cmake_print_variables(var1 var2 ..  varN)
1.1.2 说明

打印每个变量值

1.2 cmake_print_properties

1.2.1 定义
cmake_print_properties([TARGETS target1 ..  targetN]
                      [SOURCES source1 .. sourceN]
                      [DIRECTORIES dir1 .. dirN]
                      [TESTS test1 .. testN]
                      [CACHE_ENTRIES entry1 .. entryN]
                      PROPERTIES prop1 .. propN )
1.2.2 说明

打印属性值。支持TARGETS、SOURCES、DIRECTORIES、TESTS、CACHE_ENTRIES的属性打印

特别注意：PROPERTIES关键字不能丢

2 应用示例

2.1 代码结构

目录结构

  • learn_cmake：为根目录

  • build：为CMake配置输出目录（在此例中即生成sln解决方案的地方）

  • CMakeLists.txt：CMake脚本

  • cmake_config.bat：执行CMake配置过程的脚本（双击直接运行）

    @echo off
set currentDir=%~dp0
set buildDir=%currentDir%
set cmakeOutputDir=%currentDir%\build
cmake -S %buildDir% -B %cmakeOutputDir% -G"Visual Studio 16 2019" -T v140 -A x64
pause

  • src：工程源文件目录

  • main.cpp：源文件

2.2 代码内容

  1. CMakeLists.txt

    cmake_minimum_required(VERSION 3.18)

# 设置工程名称
set(PROJECT_NAME KAIZEN)

# 设置工程版本号
set(PROJECT_VERSION "1.0.0.10" CACHE STRING "默认版本号")

# 工程定义
project(${PROJECT_NAME}
    LANGUAGES CXX C
    VERSION ${PROJECT_VERSION}
)

# 打印开始日志
message(STATUS "########## BEGIN_TEST")

include(CMakePrintHelpers)

# 1.cmake_print_variables
## 1.1 打印CMAKE内置变量
cmake_print_variables(CMAKE_VERSION)
cmake_print_variables(CMAKE_GENERATOR)
## 若采用MSVC构建，可直接使用CMAKE_VS_PLATFORM_NAME
if (MSVC)
    cmake_print_variables(CMAKE_VS_PLATFORM_NAME)
endif()

## 1.2 打印普通变量
cmake_print_variables(PROJECT_NAME)
cmake_print_variables(${PROJECT_NAME})
# 若采用Ninja构建，没有CMAKE_VS_PLATFORM_NAME，可通过CMAKE_SIZEOF_VOID_P变通处理
if (CMAKE_SIZEOF_VOID_P EQUAL 8)
    set(${PROJECT_NAME}_PLATFORM_NAME "x64")
else()
    set(${PROJECT_NAME}_PLATFORM_NAME "Win32")
endif()

cmake_print_variables(${PROJECT_NAME}_PLATFORM_NAME)

## 1.3 打印缓存变量
cmake_print_variables(PROJECT_VERSION)

## 1.4 同时打印多个变量
set(var_1 "var1")
set(var_2 "var2")
cmake_print_variables(var_1 var_2)

# 2.cmake_print_properties

## 2.1 打印属性

set(TARGET_NAME component)

set(${TARGET_NAME}_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})

# 提取所有源文件(include和src分开提取)
file(GLOB_RECURSE ${TARGET_NAME}_HEADER_FILES
    LIST_DIRECTORIES False CONFIGURE_DEPENDS
    "${${TARGET_NAME}_SOURCE_DIR}/include/*.h*"
)
file(GLOB_RECURSE ${TARGET_NAME}_SRC_FILES
    LIST_DIRECTORIES False CONFIGURE_DEPENDS
    "${${TARGET_NAME}_SOURCE_DIR}/src/*.h*"
    "${${TARGET_NAME}_SOURCE_DIR}/src/*.c*"
)

# 为VS设置源代码文件夹
source_group(
    TREE "${${TARGET_NAME}_SOURCE_DIR}/include"
    PREFIX "Header Files"
    FILES ${${TARGET_NAME}_HEADER_FILES}
)
source_group(
    TREE "${${TARGET_NAME}_SOURCE_DIR}/src/"
    PREFIX "Source Files" 
    FILES ${${TARGET_NAME}_SRC_FILES}
)

# 添加target
add_library(${TARGET_NAME} SHARED)

# 指定源文件
target_sources(${TARGET_NAME}
    PRIVATE ${${TARGET_NAME}_SRC_FILES}
    PRIVATE ${${TARGET_NAME}_HEADER_FILES}
)

# 设置target属性
set_target_properties(${TARGET_NAME} PROPERTIES
    WINDOWS_EXPORT_ALL_SYMBOLS  True  ##自动导出符号
    FOLDER  "libs"  ##设置VS路径
)

cmake_print_properties(TARGETS ${TARGET_NAME} PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS FOLDER)

# 打印结束日志
message(STATUS "########## END_TEST\n")

  2. main.cpp

    int main()
{
    return 0;
}

    简单示例，此文件仅仅为了创建Target的完整性。

2.3 输出结果

  • 运行结果

    -- Selecting Windows SDK version 10.0.18362.0 to target Windows 10.0.17763.
-- The CXX compiler identification is MSVC 19.0.24245.0
-- The C compiler identification is MSVC 19.0.24245.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/cl.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/cl.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- ########## BEGIN_TEST
-- CMAKE_VERSION="3.18.2"
-- CMAKE_GENERATOR="Visual Studio 16 2019"
-- CMAKE_VS_PLATFORM_NAME="x64"
-- PROJECT_NAME="KAIZEN"
-- KAIZEN=""
-- KAIZEN_PLATFORM_NAME="x64"
-- PROJECT_VERSION="1.0.0.10"
-- var_1="var1" ; var_2="var2"
--
 Properties for TARGET component:
   component.WINDOWS_EXPORT_ALL_SYMBOLS = "True"
   component.FOLDER = "libs"

-- ########## END_TEST

-- Configuring done
-- Generating done
-- Build files have been written to: F:/learn_cmake/build
请按任意键继续. . .

2.4 注意事项

2.4.1 使用前必须引入CMakePrintHelpers

使用两者前提必须引入CMakePrintHelpers，详见示例CMakeLists.txt代码第18行。

2.4.2 打印属性

本示例仅提供了TARGETS的属性打印，也是最常用之一。其余支持的属性，后期使用到会穿插在示例中演示。

特殊说明：示例CMakeLists.txt代码第53行~93行即定义一个Target对象的常规必备项内容，后期会专门分析TARGET内容。

在此只要记住，target必须是由add_executable或者add_library（如示例CMakeLists.txt中第81行）生成即可。

posted @ 2022-01-13 23:25  kaizenly  阅读(1183)  评论(0)  编辑  收藏  举报
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