在Mac OSX 10.7.4上编译简单的Qwt程序时出错 [英] Error when compiling simple Qwt program on Mac OSX 10.7.4

问题描述

我想使用Qwt v。6.0.1来获得下面的c ++程序：

  #include< ; cmath> 
 #include< QApplication> 
 #include< qwt_plot.h> 
 #include< qwt_plot_curve.h> 
 
 int main（int argc，char ** argv）
 {
 QApplication a（argc，argv）; 
 QwtPlot plot（QwtText（CppQwtExample1））; 
 plot.setGeometry（0,0,640,400）; 
 plot.setAxisScale（QwtPlot :: xBottom，0.0，2.0 * M_PI）; 
 plot.setAxisScale（QwtPlot :: yLeft，-1.0，1.0）; 
 
 QwtPlotCurve sine（Sine）; 
 std :: vector< double> xs; 
 std :: vector< double> ys; 
 for（double x = 0; x <2.0 * M_PI; x + =（M_PI / 10.0））{
 xs.push_back（x）; 
 ys.push_back（std :: sin（x））; 
} 
 sine.setData（& xs [0]，& ys [0]，xs.size（））; 
 sine.attach（& plot）; 
 
 plot.show（）; 
 return a.exec（）; 
} 
  

且.pro档案如下：

  TEMPLATE = app 
 TARGET = CppQwtExample1 
 QMAKEFEATURES + = /usr/local/qwt-6.0.1/features 
 CONFIG + = qwt 
 INCLUDEPATH + = /usr/local/qwt-6.0.1/lib/qwt.framework/Headers 
 LIBS + = -L / usr / local / qwt-6.0.1 / lib / qwt.framework / Versions / 6 / \ 
 -lqwt 
 SOURCES + = qwtTest.cpp 
  

但是，当我现在尝试做

qmake

b
$ b

我得到错误：

ld：没有为-lqwt找到库
collect2：ld返回1退出状态
make： * [qwtTest.app/Contents/MacOS/qwtTest]错误1

非常感谢任何帮助。

解决方案

  LIBS + = -L / usr / local / qwt-6.0.1 / lib / qwt.framework / Versions / 6 / -lqwt 
  

。由于Mac OS X框架的命名约定，qwt.framework中的动态库不命名为libqwt.dylib（链接器需要它），而只是qwt。
使用

  LIBS + = -F / usr / local / qwt-6.0.1 / lib -framework qwt 
  

。

I'm trying to get the following c++ program using Qwt v. 6.0.1 to work:

#include <cmath>
#include <QApplication>
#include <qwt_plot.h>
#include <qwt_plot_curve.h>

int main(int argc, char **argv)
{
   QApplication a(argc, argv);
   QwtPlot plot(QwtText("CppQwtExample1"));
   plot.setGeometry(0,0,640,400);
   plot.setAxisScale(QwtPlot::xBottom, 0.0, 2.0*M_PI);
   plot.setAxisScale(QwtPlot::yLeft, -1.0, 1.0);

   QwtPlotCurve sine("Sine");
   std::vector<double> xs;
   std::vector<double> ys;
   for (double x=0; x<2.0*M_PI; x+=(M_PI/10.0)) {
      xs.push_back(x);
      ys.push_back(std::sin(x));
   }
   sine.setData(&xs[0], &ys[0], xs.size());
   sine.attach(&plot);

   plot.show();
   return a.exec();
}

and the .pro file looks like:

TEMPLATE = app
TARGET = CppQwtExample1
QMAKEFEATURES += /usr/local/qwt-6.0.1/features
CONFIG += qwt
INCLUDEPATH += /usr/local/qwt-6.0.1/lib/qwt.framework/Headers
LIBS += -L/usr/local/qwt-6.0.1/lib/qwt.framework/Versions/6/ \
 -lqwt
SOURCES += qwtTest.cpp

However, when I now try to do

qmake

make

I get the error:

ld: library not found for -lqwt collect2: ld returned 1 exit status make: * [qwtTest.app/Contents/MacOS/qwtTest] Error 1

I surely miss something here. Any help is greatly appreciated.

解决方案

LIBS += -L/usr/local/qwt-6.0.1/lib/qwt.framework/Versions/6/ -lqwt

This is wrong. Due to the naming conventions of Mac OS X frameworks, the dynamic library inside qwt.framework isn't named "libqwt.dylib" (which the linker requires), but simply "qwt". Use

LIBS += -F/usr/local/qwt-6.0.1/lib -framework qwt

instead.

这篇关于在Mac OSX 10.7.4上编译简单的Qwt程序时出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！