c++ - 在 fedora 20 上使 Qt 应用程序失败 :/usr/bin/ld: cannot find -lGL

Question

我正在关注这个example这里。 这是我为 make 得到的输出

admin@localhost qtest$ make
g++ -Wl,-O1 -Wl,-rpath,/home/admin/Qt/5.3/gcc_64 -Wl,-rpath,/home/admin/Qt/5.3/gcc_64/lib -o qtest qtest.o   -L/home/admin/Qt/5.3/gcc_64/lib -lQt5Gui -lQt5Core -lGL -lpthread 
/usr/bin/ld: cannot find -lGL
collect2: error: ld returned 1 exit status
make: *** [qtest] Error 1
admin@localhost qtest$ 

我的cpp文件是这样的

#include <QtWidgets/qapplication.h>
#include <QtWidgets/qpushbutton.h>

int main( int argc, char **argv )
{
    QApplication a( argc, argv );

    QPushButton hello( "Hello world!", 0 );
    hello.resize( 100, 30 );
    hello.show();
    return a.exec();
}

关于如何解决这个问题有什么建议吗？

更新

这就是我想要的

 sudo yum install mesa-libGL-devel -y

再次尝试构建:

admin@localhost qtest$ make
g++ -Wl,-O1 -Wl,-rpath,/home/admin/Qt/5.3/gcc_64 -Wl,-rpath,/home/admin/Qt/5.3/gcc_64/lib -o qtest qtest.o   -L/home/admin/Qt/5.3/gcc_64/lib -lQt5Gui -lQt5Core -lGL -lpthread 
qtest.o: In function `main':
qtest.cpp:(.text.startup+0x22): undefined reference to `QApplication::QApplication(int&, char**, int)'
qtest.cpp:(.text.startup+0x4f): undefined reference to `QPushButton::QPushButton(QString const&, QWidget*)'
qtest.cpp:(.text.startup+0x74): undefined reference to `QWidget::resize(QSize const&)'
qtest.cpp:(.text.startup+0x7c): undefined reference to `QWidget::show()'
qtest.cpp:(.text.startup+0x81): undefined reference to `QApplication::exec()'
qtest.cpp:(.text.startup+0x8c): undefined reference to `QPushButton::~QPushButton()'
qtest.cpp:(.text.startup+0x94): undefined reference to `QApplication::~QApplication()'
qtest.cpp:(.text.startup+0xab): undefined reference to `QApplication::~QApplication()'
qtest.cpp:(.text.startup+0xbe): undefined reference to `QPushButton::~QPushButton()'
qtest.cpp:(.text.startup+0xce): undefined reference to `QPushButton::~QPushButton()'
collect2: error: ld returned 1 exit status
make: *** [qtest] Error 1

Answer 1

解决您的错误:

/usr/bin/ld: cannot find -lGL

您应该以 root 身份运行以下安装命令或使用 sudo 来安装缺少的 mesa 包:

sudo yum install mesa-libGL-devel -y