Question

社区，

我在使用Embarcadero构建和使用Log4cplus库时遇到以下问题。首先，我从http://sourceforge.net/p/log4cplus/wiki/Home/下载库，然后导航到我想要构建我的库的目录，并键入cmake -G“Borland Makefiles”mypathtotherootomypreviousdownload。然后说，构建文件已写入当前目录。现在我启动MSYS sh.exe并输入make。这也有效。我得到一个bin文件夹，其中包含库的各种工作测试（作为exe文件）。在这个bin文件夹中还有一个dll log4cplusUD.dll。现在我还在src文件夹中找到相应的LIB log4cplusUD.lib。我当然熟悉如何将动态库与Embarcadero静态链接。但是在尝试编译时

#pragma hdrstop
#pragma argsused

#ifdef _WIN32
#include <tchar.h>
#else
  typedef char _TCHAR;
  #define _tmain main
#endif

#include <stdio.h>

#include "log4cplus/logger.h"
#include "log4cplus/consoleappender.h"
#include "log4cplus/loglevel.h"
#include <log4cplus/loggingmacros.h>
#include <iomanip>

using namespace std;
using namespace log4cplus;



 int _tmain(int argc, _TCHAR* argv[]) 
{

    log4cplus::initialize ();
    SharedAppenderPtr append_1(new ConsoleAppender());
    append_1->setName(LOG4CPLUS_TEXT("First"));
    Logger::getRoot().addAppender(append_1);

    Logger root = Logger::getRoot();
    Logger test = Logger::getInstance(LOG4CPLUS_TEXT("test"));

    LOG4CPLUS_DEBUG(root,
                    "This is"
                    << " a reall"
                    << "y long message." << endl
                    << "Just testing it out" << endl
                    << "What do you think?");
    test.setLogLevel(NOT_SET_LOG_LEVEL);
    LOG4CPLUS_DEBUG(test, "This is a bool: " << true);
    LOG4CPLUS_INFO(test, "This is a char: " << 'x');
    LOG4CPLUS_INFO(test, "This is a short: " << static_cast<short>(-100));
    LOG4CPLUS_INFO(test, "This is a unsigned short: "
        << static_cast<unsigned short>(100));
    LOG4CPLUS_INFO(test, "This is a int: " << 1000);
    LOG4CPLUS_INFO(test, "This is a unsigned int: " << 1000u);
    LOG4CPLUS_INFO(test, "This is a long(hex): " << hex << 100000000l);
    LOG4CPLUS_INFO(test, "This is a unsigned long: " << 100000000ul);
    LOG4CPLUS_WARN(test, "This is a float: " << 1.2345f);
    LOG4CPLUS_ERROR(test,
                    "This is a double: "
                    << setprecision(15)
                    << 1.2345234234);
    LOG4CPLUS_FATAL(test,
                    "This is a long double: "
                    << setprecision(15)
                    << 123452342342.25L);
    LOG4CPLUS_WARN(test, "The following message is empty:");
    LOG4CPLUS_WARN(test, "");

    return 0;
}

我收到链接器错误，未解析外部符号log4cplus :: Logger :: getInstance。

上面的代码只是从sh.exe运行make时编译和运行良好的测试之一。那么我做错了什么？

我还尝试将上面的main.cpp againts log4cplusUD.lib与以下CMakeLists.txt文件链接

cmake_minimum_required (VERSION 2.6)
project (log4cplustest)

include_directories("C:/Users/fin/Software/log4cplus-1.2.0-rc3/log4cplus-1.2.0-rc3/include")
add_executable(log4cplustest main.cpp)
target_link_libraries(log4cplustest log4cplusUD)

但是我得到了相同的链接器错误！

使用CMake构建和使用Log4cplus

0 个答案: