Qt compiler warning: overriding commands for target / ignoring old commands for target

c++ qt qmake moc
sashoalm picture sashoalm · Jan 18, 2011 · Viewed 28.3k times · Source

When I'm compiling my Qt project for Windows I receive these 2 warnings:

Makefile.Debug:109: warning: overriding commands for target `debug/moc_mainwindow.cpp'
Makefile.Debug:106: warning: ignoring old commands for target `debug/moc_mainwindow.cpp'

I assume they indicate some problem with my project config, what is the problem and how do I fix it?

Answer

Kadir Erdem Demir picture Kadir Erdem Demir · Jan 10, 2013

I got the same error once , maybe source of your problem is different but I will write anyways. In my *.pro file, it was like :

SOURCES += main.cpp\
    mainwindow.cpp\
    serialHelper.cpp \
serialHelper.cpp

HEADERS  += mainwindow.h\
     += serialHelper.h \
serialHelper.h \
typeDefinitions.h

cpp and header file was repeating itself. I delete the repeating includes and problem solved for me .

Related questions

Undefined reference to vtable. Trying to compile a Qt project

I'm using Code::Blocks 8.02 and the mingw 5.1.6 compiler. I'm getting this error when I compile my Qt project: C:\Documents and Settings\The Fuzz\Desktop\GUI\App_interface.cpp|33|undefined reference to `vtable for AddressBook' File AddressBook.h: #ifndef ADDRESSBOOK_…

Read More
Qt 5.3. QtWidgets: No such file or directory #include <QtWidgets>

I want to compile Qt example. I get error QtWidgets: No such file or directory #include greaterThan(QT_MAJOR_VERSION, 4): QT += widgets - does not help QT += widgets - does not help INCLUDEPATH += /opt/Qt/5.3/Src/qtbase/include/ - does …

Read More
What are the differences and similarities between CMake and qmake?

I would like to know reasons for use CMake for particular project over qmake and vice versa. Simply what are the pros and cons of both build systems? I searched and found few documents but feel difficult to understand.

Read More