如何在Windows / MSVS的同一cmake项目中构建可执行文件和共享库

Question

what I want to do is :

• create a shared library and export its API to be usable by other programs
• create a simple executable in the same project that uses the library (to show concrete example of how to use the library for example
• build it using cmake, must work with Visual Studio (2010) and windows 7

I tried this code (quick test case) :

CMakeLists.txt

PROJECT (minimalcpp)
CMAKE_MINIMUM_REQUIRED (VERSION 2.6)

SET(LIBSAMPLE_HEADERS func_simple.h)
SET(LIBSAMPLE_SRCS func_simple.cpp)

ADD_LIBRARY (minimalcpp SHARED ${LIBSAMPLE_SRCS})

ADD_EXECUTABLE (test-pure-cpp test-pure-cpp.cpp)
TARGET_LINK_LIBRARIES (test-pure-cpp minimalcpp)

# THIS WORKS BUT IT IS NOT WHAT I WANT :
# ADD_EXECUTABLE (test-pure-cpp test-pure-cpp.cpp ${LIBSAMPLE_SRCS})

macros.h

#ifndef MACROS_H
#define MACROS_H

#if defined _WIN32 || defined __CYGWIN__
    #if minimalcpp_EXPORTS
        #define MINIMALCPP_API __declspec(dllexport)
    #else
        #define MINIMALCPP_API __declspec(dllimport)
    #endif
#endif

#endif

func_simple.h

#ifndef LIB_SAMPLE_FUNC_SIMPLE_H
#define LIB_SAMPLE_FUNC_SIMPLE_H

#include "macros.h"

namespace sample {
MINIMALCPP_API void f1(int nmax);
}

#endif // LIB_SAMPLE_FUNC_SIMPLE_H

func_simple.cpp

#include <iostream>
#include "func_simple.h"

void sample::f1(int nmax) {
  int i ;
  for(i=0 ; i < nmax ; i++) {
    std::cout << i << " -> " << i*i << std::endl;
  }
}

test-pure-cpp.cpp

#include "func_simple.h"

int main(int argc, char *argv[]){
    sample::f1(5);
    return 0;
}

This code compiles but crashes directly at execution.

Error message :

Le programme s'est terminé subitement.
... a quitté avec le code -1073741515

I am a beginner in C++ on windows, what did I do wrong ? Thank you very much

Answer 1

see [g-makulik] answer :

In this case, this message means that dll is not found and that is why application crashes. One solution is to say to cmake to put dll and executable in same directory, in bin for example :

SET(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)
SET(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

This convention is used in libraries like Qt for example.