cmake学习

一、创建一个cmake工程

Qt creator：file->New File or Porject...>>Non-Qt Project>>Plain C Project//或者//Plain C++ Project

CMakeLists.txt:

cmake_minimum_required(VERSION 3.7.1)

project(hello-world)

set(SOURCE_FILES main.c)

message(STATUS "This is BINARY dir " ${PROJECT_BINARY_DIR})
message(STATUS "This is SOURCE dir " ${PROJECT_SOURCE_DIR})

add_executable(hello-world ${SOURCE_FILES})

main.c:

			#include <stdio.h>

			int main() {
			    printf("Hello World.
");

			    return 0;
			}

可以再文件目录下创建build，然后再build目录下执行cmake ..
这样的话创建的cmake和make中间文件就在build目录下了。执行make
然后./hello-world

二、创建子目录文件

helloCMake/CMakeLists.txt:

			cmake_minimum_required(VERSION 3.2)

			project(helloCMake)
			ADD_SUBDIRECTORY(src bin)

helloCMake/src/CMakeLists.txt:

			cmake_minimum_required(VERSION 2.8.4)

			add_executable(helloCMake main.cpp)

main.cpp:

			#include <iostream>

			using namespace std;

			int main()
			{
			    cout << "Hello World!" << endl;
			    return 0;
			}

CMake的语法总结:
PROJECT 指令的语法是：

PROJECT(projectname [CXX] [C] [Java])

				project(hello cxx c)

SET 指令的语法是：

SET(VAR [VALUE] [CACHE TYPE DOCSTRING [FORCE]])

					set(PX4_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")

MESSAGE 指令的语法是：

MESSAGE([SEND_ERROR | STATUS | FATAL_ERROR] "message to display"...)

					message(FATAL_ERROR "Update CMake and try again" )

ADD_SUBDIRECTORY 指令

ADD_SUBDIRECTORY(source_dir [binary_dir] [EXCLUDE_FROM_ALL])

						ADD_SUBDIRECTORY(src bin)