hello world

  • 最基本CMakeLists文件看起来像是这样:
cmake_minimum_required(VERSION 3.0)
project(Tutorial)
add_executable(Tutorial tutorial.cxx)

tutorial.cxx可以是最简单的hello world程序，如下：

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
   printf("Hello world!\n");
   return 0;
}
  • 添加版本号
cmake_minimum_required(VERSION 3.0)
project(Tutorial)

# version
set (Tutorial_VERSION_MAJOR 1)
set (Totorial_VERSION_MINOR 0)

# configure file, pass the version number to source file
configure_file (
       ${PROJECT_SOURCE_DIR}/TutorialConfig.h.in
       ${PROJECT_BINARY_DIR}/TutorialConfig.h
)

include_directories(${PROJECT_BINARY_DIR})

add_executable(Tutorial tutorial.cxx)

TutorialConfig.h.in

#define Tutorial_VERSION_MAJOR @Tutorial_VERSION_MAJOR@
#define Tutorial_VERSION_MINOR @Tutorial_VERSION_MINOR@

tutorial.cxx

#include <stdio.h>
#include <stdlib.h>
#include "TutorialConfig.h"

int main(int argc, char *argv[])
{
   printf("Version:%d.%d\n", Tutorial_VERSION_MAJOR, Tutorial_VERSION_MANOR);
   printf("Hello world!\n");
   return 0;
}

引入自定义库

目录结构如下

        ---example
           |---------hello_world.cxx
           |---------CMakeLists.txt
           |---------TutorialConfig.h.in
           |---------math
                      |--------mymath.cxx
                      |--------CMakeLists.txt
  • 主CMakeLists.txt
cmake_minimum_required(VERSION 3.0)
project(Tutorial)

# version
set (Tutorial_VERSION_MAJOR 1)
set (Totorial_VERSION_MINOR 0)

# configure file, pass the version number to source file
configure_file (
       ${PROJECT_SOURCE_DIR}/TutorialConfig.h.in
       ${PROJECT_BINARY_DIR}/TutorialConfig.h
)

include_directories(${PROJECT_BINARY_DIR})

add_subdirectory(math)

add_executable(Tutorial tutorial.cxx)

target_link_libraries(Tutorial mymath)
  • math中CMakeList.txt
 add_library(mymath mymath.cxx)
  • mymath.cxx
 int myadd(int a, int b)
 { return a+b; }
  • hello_world.cxx
#include <stdio.h>
#include <stdlib.h>
#include "TutorialConfig.h"

extern int myadd(int, int);

int main(int argc, char *argv[])
{
   printf("myadd:%d\n",  myadd(1, 2));
   printf("Version:%d.%d\n", Tutorial_VERSION_MAJOR, Tutorial_VERSION_MANOR);
   printf("Hello world!\n");
   return 0;
}