build_a_cpp_lib.md

libHelloSLAM.cpp:

//这是一个库文件
#include <iostream>
using namespace std;
void printHello()
{
  cout<<"Hello SLAM"<<endl;
}

CMakeList.txt

add_library( hello libHelloSLAM.cpp)

Then generate a static link library named libhello.a

If we want to build a shared library: then we need to

add_library( hello SHARED libHelloSLAM.cpp)

library is a binary file, so when should offer a header to declare what functions are in this library.

libHelloSLAM.h:

#ifndef LIBHELLOSLAM_H_
#define LIBHELLOSLAM_H_
void printHello();
#endif

then we create a file to use this library:

useHello.cpp

#include "libHelloSLAM.h"
int main( int argc, char** argv){
  printHello();
  return 0;
}

Then add these commands into CMakeLists.txt

add_executable( useHello useHello.cpp)
target_link_libraries( useHello hello)

ide: kdevelop

1. write a CMakeLists.txt

2. set in the CMakeLists.txt

    set( CMAKE_BUILD_TYPE "Debug")
   

3. Run->Launch configurations->add mew->ok

4. F8 compile, F9 debug