32/7.3.0/include/c++/backward -ID:/qt/Tools/mingw730_32/lib/gcc/i686-w64-mingw32/7.3.0/include -ID:/qt/Tools/mingw730_32/lib/gcc/i686-w64-mingw32/7.3.0/include-fixed -ID:/qt/Tools/mingw730_32/i686-w64-mingw32/include ..\untitled8\mainwindow.h -o debug\moc_mainwindow.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -W -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I..\untitled8 -I. -I..\..\qt\5.12.2\mingw73_32\include -I..\..\qt\5.12.2\mingw73_32\include\QtWidgets -I..\..\qt\5.12.2\mingw73_32\include\QtGui -I..\..\qt\5.12.2\mingw73_32\include\QtANGLE -I..\..\qt\5.12.2\mingw73_32\include\QtCore -Idebug -I. -I..\..\qt\5.12.2\mingw73_32\mkspecs\win32-g++-o debug\moc_mainwindow.o debug\moc_mainwindow.cpp
g++ -Wl,-subsystem,windows -mthreads -o debug\untitled8.exe debug/main.o debug/mainwindow.o debug/moc_mainwindow.o-LD:\qt\5.12.2\mingw73_32\lib D:\qt\5.12.2\mingw73_32\lib\libQt5Widgetsd.a D:\qt\5.12.2\mingw73_32\lib\libQt5Guid.a D:\qt\5.12.2\mingw73_32\lib\libQt5Cored.a-lmingw32 D:\qt\5.12.2\mingw73_32\lib\libqtmaind.a -LC:\openssl\lib -LC:\Utils\my_sql\mysql-5.6.11-win32\lib -LC:\Utils\postgresql\pgsql\lib -lshell32
mingw32-make[1]: Leaving directory 'D:/qcpp/build-untitled8-Desktop_Qt_5_12_2_MinGW_32_bit-Debug'
13:17:02: 进程"D:\qt\Tools\mingw730_32\bin\mingw32-make.exe"正常退出。
13:17:02: Elapsed time: 00:09.

实在没办法的话只能用重装系统大法了。