Qt5.x解决报错main.cpp:1:10: fatal error: QApplication: No such file or directory问题

问题描述
定位问题
解决方法
The end

问题描述

创建Qt5项目完成后，编译出现如下错误：

$ qmake -project
$ ls
Image.pro main.cpp
$ qmake -makefile
$ make
g++ -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -I../../../Qt/5.15.0/gcc_64/include -I../../../Qt/5.15.0/gcc_64/include/QtGui -I../../../Qt/5.15.0/gcc_64/include/QtCore -I. -isystem /usr/include/libdrm -I../../../Qt/5.15.0/gcc_64/mkspecs/linux-g++ -o main.o main.cpp
main.cpp:1:10: fatal error: QApplication: No such file or directory#include <QApplication>^~~~~~~~~~~~~~
compilation terminated.
Makefile:748: recipe for target 'main.o' failed
make: *** [main.o] Error 1

定位问题

此错误是由于从Qt版本5开始，所有native GUI功能都已从core模块移至单独的模块，即widgets模块。应该向qmake声明应用程序依赖于该模块。

解决方法

修改项目文件.pro文件，例如创建Image项目，则为Image.pro。

$ vim Image.pro

添加greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
修改完成后Image.pro如下(不考虑注释行)：

TEMPLATE = app
TARGET = ImageViewer
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
INCLUDEPATH += .
SOURCES += main.cpp

再次编译项目即可。

$ qmake -makefile
$ make
$ ls
Image Image.pro  main.cpp  main.o  Makefile
$ ./Image

简单测试，成功执行：

The end

Enjoy coding.

Qt5.x解决报错main.cpp:1:10: fatal error: QApplication: No such file or directory问题相关推荐

【Qt】main.cpp:1:24: fatal error: QApplication: No such file or directory
QT版本:5.7.0 代码: #include <QApplication> #include <QLineEdit> #include <QPushButton> ...
解决编译redis报错zmalloc.h:50:10: fatal error: jemalloc/jemalloc.h: No such file or directory
解决方法进入redis的目录后运行: sudo make 时报错:zmalloc.h:50:10: fatal error: jemalloc/jemalloc.h: No such file or ...
edk2编译报错 BrotliCompress.c:20:10: fatal error: ./brotli/c/common/constants.h: No such file or directo
近期github上的edk2版本有些问题 edk2\BaseTools\Source\C\BrotliCompress\brotli edk2\MdeModulePkg\Library\BrotliC ...
CentOS中输入yum报错：sudo: unable to execute /bin/yum: No such file or directory
今天尝试更新了下虚拟机CentOS中的python版本后. 运行"yum"命令,就报错:"sudo: unable to execute /bin/yum: No suc ...
import dlib，报错:ImportError: libcublas.so.10.0: cannot open shared object file: No such file or direc
import dlib,报错:ImportError: libcublas.so.10.0: cannot open shared object file: No such file or direc ...
python保存与加载LGBM模型，并解决报错TypeError: Need at least one training dataset or model file or model string..
方法一(适用于sklearn接口:from lightgbm import LGBMClassifier) 比如现在有一个lgbm_model import joblib# 保存 joblib.dum ...
关于nginx报错/usr/share/nginx/html/jiankongshare failed (2: No such file or directory)的问题解决...
nginx的location虚拟目录配置: monitor.conf server { server_name monitor.chinasoft.com; server_ ...
Autopep8 安装时出现的两种报错 failed to create process 和 [Errno 2] No such file or directory
Autopep8 安装时出现的两种报错 1.failed to create process 2.[Errno 2] No such file or directory 小结关键词: autopep ...
vscode——运行程序报错 cc1plus.exe: fatal error: xxx: No such file or directory
问题描述当我点击运行我编写的 c.cpp文件时,产生了如下错误:cc1plus.exe: fatal error: Vscode\c.cpp: No such file or directory 我 ...

Qt5.x解决报错main.cpp:1:10: fatal error: QApplication: No such file or directory问题

Qt5.x解决报错main.cpp:1:10: fatal error: QApplication: No such file or directory问题

问题描述

定位问题

解决方法

The end

Qt5.x解决报错main.cpp:1:10: fatal error: QApplication: No such file or directory问题相关推荐

最新文章

热门文章