我在这里关注example。 这是我得到的输出
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文件是这个
#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();
}
有关如何解决此问题的任何建议?
更新
这是我得到的
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
答案 0 :(得分:4)
解决您的错误:
/ usr / bin / ld:找不到-lGL
您应该以root用户身份或使用sudo
运行以下安装命令来安装缺少的mesa软件包:
sudo yum install mesa-libGL-devel -y
答案 1 :(得分:3)
打开你的foo.pro文件。
你可能有类似的东西:
######################################################################
# Automatically generated by qmake (3.0) Mon Nov 17 14:00:29 2014
######################################################################
TEMPLATE = app
TARGET = test
INCLUDEPATH += .
# Input
SOURCES += foo.cpp
添加到顶部&#34; QT + =小部件&#34;,以便您的文件现在显示为:
######################################################################
# Automatically generated by qmake (3.0) Mon Nov 17 14:00:29 2014
######################################################################
QT += widgets
TEMPLATE = app
TARGET = test
INCLUDEPATH += .
# Input
SOURCES += foo.cpp
然后运行qmake
和make
。这应该允许它找到相关的标题。
您的第二个错误不是库,而是查找Qt的QtCore和QtWidgets模块。