CMake 学习教程

CMake是跨平台、开源构建工具。产出的内容基于具体平台的makefile，可以理解是更高的一层封装

变量

设置自定义变量

可以通过SET(VAR [VALUE] [CACHE TYPE DOCSTRING [FORCE]])命令来定义变量，通过${NAME}来获取变量内容

1	SET(SRC_LST main.c other.c)

查看当前所有变量

预先设置好的变量可以查看官方文档，此外可以通过如下代码，查看当前系统的预设环境变量，完整演示。

get_cmake_property(_variableNames VARIABLES)
foreach (_variableName ${_variableNames})
    message(STATUS "${_variableName}=${${_variableName}}")
endforeach()
execute_process(COMMAND "${CMAKE_COMMAND}" "-E" "environment")

常见预设变量汇总

Variables that Provide Information

................variableName................ 含义

PROJECT_NAME¶ Name of the project given to the project command.

CMAKE_BINARY_DIR¶ Full path to the top level of the build tree.

PROJECT_BINARY_DIR¶ Full path to build directory for project.

<PROJECT-NAME>_BINARY_DIR¶ Top level binary directory for the named project.

CMAKE_SOURCE_DIR¶ Full path to the top level of the source tree.

PROJECT_SOURCE_DIR¶ This is the source directory of the last call to the project() command made in the current directory scope or one of its parents.

<PROJECT-NAME>_SOURCE_DIR¶ Top level source directory for the named project.

EXECUTABLE_OUTPUT_PATH , LIBRARY_OUTPUT_PATH

Variables that Describe the System

............variableName............ 含义

CMAKE_MAJOR_VERSION¶ First version number component of the CMAKE_VERSION variable.

CMAKE_MINOR_VERSION¶ Second version number component of the CMAKE_VERSION variable.

CMAKE_PATCH_VERSION¶ Third version number component of the CMAKE_VERSION variable.

CMAKE_SYSTEM_NAME¶ The name of the operating system for which CMake is to build.

CMAKE_SYSTEM_VERSION¶ The version of the operating system for which CMake is to build.

CMAKE_SYSTEM¶ ${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_VERSION}

CMAKE_SYSTEM_PROCESSOR¶

UNIX¶ Set to True when the target system is UNIX or UNIX-like

WIN32¶ Set to True when the target system is Windows, including Win64.

................variableName................	含义
PROJECT_NAME¶	Name of the project given to the project command.


CMAKE_BINARY_DIR¶	Full path to the top level of the build tree.
PROJECT_BINARY_DIR¶	Full path to build directory for project.
<PROJECT-NAME>_BINARY_DIR¶	Top level binary directory for the named project.
CMAKE_SOURCE_DIR¶	Full path to the top level of the source tree.
PROJECT_SOURCE_DIR¶	This is the source directory of the last call to the `project()` command made in the current directory scope or one of its parents.
<PROJECT-NAME>_SOURCE_DIR¶	Top level source directory for the named project.
EXECUTABLE_OUTPUT_PATH , LIBRARY_OUTPUT_PATH

............variableName............	含义
CMAKE_MAJOR_VERSION¶	First version number component of the `CMAKE_VERSION` variable.
CMAKE_MINOR_VERSION¶	Second version number component of the `CMAKE_VERSION` variable.
CMAKE_PATCH_VERSION¶	Third version number component of the `CMAKE_VERSION` variable.
CMAKE_SYSTEM_NAME¶	The name of the operating system for which CMake is to build.
CMAKE_SYSTEM_VERSION¶	The version of the operating system for which CMake is to build.
CMAKE_SYSTEM¶	${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_VERSION}
CMAKE_SYSTEM_PROCESSOR¶
UNIX¶	Set to `True` when the target system is UNIX or UNIX-like
WIN32¶	Set to `True` when the target system is Windows, including Win64.