在Windows中链接FLTK 2.0中的错误 [英] Linking errors in FLTK 2.0 in windows

问题描述

我使用Qt Creator（不使用任何Qt库）测试一个Hello World项目的FLTK2.0。但我得到的错误如：

错误：
UpBox.cxx：-1：错误：undefined引用 SelectObject @ 8'
UpBox.cxx：-1：error：未定义引用 SetROP2 @ 8'
UpBox.cxx：-1：error：undefined reference to PatBlt @ 24'
UpBox.cxx：-1：错误：未定义引用 CreatePatternBrush @ 4'
UpBox.cxx：-1：error：未定义引用 DeleteObject @ 4'
：-1：错误：C：\Users\mypc\Desktop\FLTK\fltk-2.0-win-bin \lib / libfltk2.a（UpBox.o）：区域中的错误重定位地址0xb .text $ _ZN4fltk7FlatBoxD1Ev [__ ZN4fltk7FlatBoxD1Ev]'

main.cpp文件如下：

  #include< fltk / Window .h> 
 #include< fltk / Widget.h> 
 #include< fltk / run.h> 
 
使用命名空间fltk; 
 
 int main（int argc，char ** argv）{
 Window * window = new Window（300，180）; 
 window-> begin（）; 
 Widget * box = new Widget（20，40，260，100，Hello，World！）; 
 box-> box（UP_BOX）; 
 box-> labelfont（HELVETICA_BOLD_ITALIC）; 
 box-> labelsize（36）; 
 box-> labeltype（SHADOW_LABEL）; 
 window-> end（）; 
 window-> show（argc，argv）; 
 return run（）; 
} 
  

hello.pro文件：

  TEMPLATE = app 
 CONFIG + = console 
 CONFIG  -  = app_bundle 
 CONFIG  -  = qt 
 SOURCES + = main.cpp 
 CONFIG + = c ++ 11 
 LIBS + = -LC：\\Users\\mypc\\Desktop\\FLTK \\fltk-2.0-win-bin\\lib-lfltk2 
 INCLUDEPATH + =C：\\Users\\mypc\\Desktop\\FLTK\\ \\\fltk-2.0-win-bin\\ include
 DEPENDPATH + =C：\\Users\\mypc\\Desktop\\FLTK\\ fltk-2.0-win-bin \\include
  

为什么会收到这些错误？ / p>

nb：FLTK 2.o MinGw编译的二进制文件从 FLTK Windows二进制文件

解决方案

静态库FLTK正确链接，要链接到Win32 API在Windows上工作。

您还必须链接到Gdi32.dll。

I am using Qt Creator( without using any of Qt libraries) to test a Hello World project of FLTK2.0. But I am getting errors like:

Errors: UpBox.cxx:-1: error: undefined reference to SelectObject@8' UpBox.cxx:-1: error: undefined reference toSetROP2@8' UpBox.cxx:-1: error: undefined reference to PatBlt@24' UpBox.cxx:-1: error: undefined reference toCreatePatternBrush@4' UpBox.cxx:-1: error: undefined reference to DeleteObject@4' :-1: error: C:\Users\mypc\Desktop\FLTK\fltk-2.0-win-bin\lib/libfltk2.a(UpBox.o): bad reloc address 0xb in section.text$_ZN4fltk7FlatBoxD1Ev[__ZN4fltk7FlatBoxD1Ev]'

The main.cpp file is given below:

#include <fltk/Window.h>
#include <fltk/Widget.h>
#include <fltk/run.h>

using namespace fltk;

int main(int argc, char **argv) {
    Window *window = new Window(300, 180);
    window->begin();
    Widget *box = new Widget(20, 40, 260, 100, "Hello, World!");
    box->box(UP_BOX);
    box->labelfont(HELVETICA_BOLD_ITALIC);
    box->labelsize(36);
    box->labeltype(SHADOW_LABEL);
    window->end();
    window->show(argc, argv);
    return run();
}

The hello.pro file:

TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt
SOURCES += main.cpp
CONFIG+= c++11
LIBS += -L"C:\\Users\\mypc\\Desktop\\FLTK\\fltk-2.0-win-bin\\lib" -lfltk2
INCLUDEPATH += "C:\\Users\\mypc\\Desktop\\FLTK\\fltk-2.0-win-bin\\include"
DEPENDPATH += "C:\\Users\\mypc\\Desktop\\FLTK\\fltk-2.0-win-bin\\include"

Why am I getting these errors?

n.b: the FLTK 2.o MinGw compiled binaries are downloaded from FLTK Windows binaries

解决方案

The static library FLTK is correctly linked, but it also requires to be linked to Win32 API to work on windows.

You have to link to Gdi32.dll as well.

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