Added new class to clean Qt application, gotcompile error "No such file or directory"

Hi,

I'm fairly new to Qt.

In a larger GUI programming project, on Linux with Qt Creator 5.2. Now I need to split things up and therefor make som tests

I'm about to make a namespace test and in order for that, I create a new QApplication, compile out of the box - OK
Next I add a new C++ class that inherit from QObject.
Straight out of the box, it compiles

Now when I add the class it fails to compile straight of with two errors
Error: all: "No such file or directory"
[first] Error 1

Guess it has to do with paths missing but where??
Suggestions??

Code:

---

#include <QMainWindow>
 
namespace Ui {      class MainWindow;   }
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
....
 
 
#include <QObject>
 
class First : public QObject
{
    Q_OBJECT
public:
    explicit First(QObject *parent = 0);
 
signals:
...
 
// in .cpp
#include "first.h"
 
First::First(QObject *parent) :
    QObject(parent)
{
}

---

Which file does it not find?

Cheers,
_

Hi anda_skoa

Good question, this is all info the compiler sends out, 2 lines of error!!????

that's very unlikely.

Make sure you are looking at the compile output tab

Cheersm
_

Hi, yes I'm sure, attached a screenshot, as it looks (didn't display the code though
Attachment 10997

This is not "compile output". Look at another tab where You see clean aoutput from compiler.

OK, another image then
Attachment 10998

gcc is looking for file all.

OK, so how does that happen??
Shall I edit the makefile or what??

What does the project file look like?

Hi, Godmorning

the .pro file looks like this

Code:

---

-------------------------------------------------
#
# Project created by QtCreator 2015-03-03T02:16:46
#
#-------------------------------------------------
 
QT       += core gui
 
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
TARGET = t2
TEMPLATE = app
 
 
SOURCES += main.cpp\
        mainwindow.cpp \
    first.cpp
 
HEADERS  += mainwindow.h \
    first.h
 
FORMS    += mainwindow.ui

---

---

Added after 35 minutes:

Leisok, I found this in the autogenerated makefile, Do you think it has something to do with it??

Quote:

---

QMAKE_TARGET = t2
DESTDIR = #avoid trailing-slash linebreak
TARGET = t2


first: all
####### Implicit rules

.SUFFIXES: .o .c .cpp .cc .cxx .C

.cpp.o:
$(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"

.cc.o:
$(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"

.cxx.o:
$(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"

.C.o:
$(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"

.c.o:
$(CC) -c $(CFLAGS) $(INCPATH) -o "$@" "$<"

####### Build rules

all: Makefile $(TARGET)

---

Delete the Makefile and rebuild the project.

Deleted and rebuild, same problem. This is the compiler output

Quote:

---

19:54:21: Running steps for project t2...
19:54:21: Starting: "/home/anders/Qt/5.2.0/gcc/bin/qmake" /home/anders/programmering/t2/t2.pro -r -spec linux-g++ CONFIG+=debug CONFIG+=declarative_debug CONFIG+=qml_debug
19:54:21: The process "/home/anders/Qt/5.2.0/gcc/bin/qmake" exited normally.
19:54:21: Starting: "/usr/bin/make"
g++ -c -pipe -g -Wall -W -D_REENTRANT -fPIE -DQT_QML_DEBUG -DQT_DECLARATIVE_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../../Qt/5.2.0/gcc/mkspecs/linux-g++ -I../t2 -I../../Qt/5.2.0/gcc/include -I../../Qt/5.2.0/gcc/include/QtWidgets -I../../Qt/5.2.0/gcc/include/QtGui -I../../Qt/5.2.0/gcc/include/QtCore -I. -I. -I. -o first.o ../t2/first.cpp
/home/anders/Qt/5.2.0/gcc/bin/uic ../t2/mainwindow.ui -o ui_mainwindow.h
g++ -c -pipe -g -Wall -W -D_REENTRANT -fPIE -DQT_QML_DEBUG -DQT_DECLARATIVE_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../../Qt/5.2.0/gcc/mkspecs/linux-g++ -I../t2 -I../../Qt/5.2.0/gcc/include -I../../Qt/5.2.0/gcc/include/QtWidgets -I../../Qt/5.2.0/gcc/include/QtGui -I../../Qt/5.2.0/gcc/include/QtCore -I. -I. -I. -o main.o ../t2/main.cpp
g++ -c -pipe -g -Wall -W -D_REENTRANT -fPIE -DQT_QML_DEBUG -DQT_DECLARATIVE_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../../Qt/5.2.0/gcc/mkspecs/linux-g++ -I../t2 -I../../Qt/5.2.0/gcc/include -I../../Qt/5.2.0/gcc/include/QtWidgets -I../../Qt/5.2.0/gcc/include/QtGui -I../../Qt/5.2.0/gcc/include/QtCore -I. -I. -I. -o mainwindow.o ../t2/mainwindow.cpp
/home/anders/Qt/5.2.0/gcc/bin/moc -DQT_QML_DEBUG -DQT_DECLARATIVE_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../../Qt/5.2.0/gcc/mkspecs/linux-g++ -I../t2 -I../../Qt/5.2.0/gcc/include -I../../Qt/5.2.0/gcc/include/QtWidgets -I../../Qt/5.2.0/gcc/include/QtGui -I../../Qt/5.2.0/gcc/include/QtCore -I. -I. -I. ../t2/mainwindow.h -o moc_mainwindow.cpp
g++ -c -pipe -g -Wall -W -D_REENTRANT -fPIE -DQT_QML_DEBUG -DQT_DECLARATIVE_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../../Qt/5.2.0/gcc/mkspecs/linux-g++ -I../t2 -I../../Qt/5.2.0/gcc/include -I../../Qt/5.2.0/gcc/include/QtWidgets -I../../Qt/5.2.0/gcc/include/QtGui -I../../Qt/5.2.0/gcc/include/QtCore -I. -I. -I. -o moc_mainwindow.o moc_mainwindow.cpp
/home/anders/Qt/5.2.0/gcc/bin/moc -DQT_QML_DEBUG -DQT_DECLARATIVE_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../../Qt/5.2.0/gcc/mkspecs/linux-g++ -I../t2 -I../../Qt/5.2.0/gcc/include -I../../Qt/5.2.0/gcc/include/QtWidgets -I../../Qt/5.2.0/gcc/include/QtGui -I../../Qt/5.2.0/gcc/include/QtCore -I. -I. -I. ../t2/first.h -o moc_first.cpp
g++ -c -pipe -g -Wall -W -D_REENTRANT -fPIE -DQT_QML_DEBUG -DQT_DECLARATIVE_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../../Qt/5.2.0/gcc/mkspecs/linux-g++ -I../t2 -I../../Qt/5.2.0/gcc/include -I../../Qt/5.2.0/gcc/include/QtWidgets -I../../Qt/5.2.0/gcc/include/QtGui -I../../Qt/5.2.0/gcc/include/QtCore -I. -I. -I. -o moc_first.o moc_first.cpp
g++ -Wl,-rpath,/home/anders/Qt/5.2.0/gcc -Wl,-rpath,/home/anders/Qt/5.2.0/gcc/lib -o t2 main.o mainwindow.o first.o moc_mainwindow.o moc_first.o -L/home/anders/Qt/5.2.0/gcc/lib -lQt5Widgets -lQt5Gui -lQt5Core -lGL -lpthread
{ test -n "" && DESTDIR="" || DESTDIR=.; } && test $(gdb --version | sed -e 's,[^0-9][^0-9]*\([0-9]\)\.\([0-9]\).*,\1\2,;q') -gt 72 && gdb --nx --batch --quiet -ex 'set confirm off' -ex "save gdb-index $DESTDIR" -ex quit 't2' && test -f t2.gdb-index && objcopy --add-section '.gdb_index=t2.gdb-index' --set-section-flags '.gdb_index=readonly' 't2' 't2' && rm -f t2.gdb-index || true
gcc first.o all -o first
gcc: error: all: No such file or directory
make: *** [first] Error 1
19:54:26: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project t2 (kit: Desktop Qt 5.2.0 GCC 32bit)
When executing step 'Make'
19:54:26: Elapsed time: 00:05.

---

BTW, the clock is wrong, just ran the compiler with above result

Do you have any extra build steps in your config?

The problem seems to come from the filename "first"
The Makefile has a standard target called "first", this seems to lead to a mixup with the rule for bulding first.o

Try renaming first.h/.cpp to something else.

Cheers,
_

Hmmm, shall test to remove/rename first

result
Tested on my mac - same problem.
Tested on my Linux - fixed problem

Interesting, but not surprised, Linux is much easier to compile in (to get it to compile/working) than in my mac.

Well ever the less, learned that I can't use the name first, or any other name that make uses.

Thanks for the assistanse/help
cheers and and have a nice weekend with happy coding to U