Re: [Qt-creator] printf() with Qt Creator?
On Apr 24, 2010, at 11:51 PM, ext Danny Price wrote: On 24 Apr 2010, at 22:22, Robert Hairgrove wrote: This is also an issue in non-Qt apps. Just change this line: std::cout test; to this: std::cout test std::endl; On some platforms (*nix, I think) you need to do this in order to keep the next output from overwriting the line test. Thanks it now works! The CONFIG += console line appears to have no effect on OSX either way. I suppose it's really for Windows? http://doc.qt.nokia.com/4.6/qmake-variable-reference.html#config I've not been able to get printf to work though, even with a '\n'. ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator ATT1..txt -- Eike Ziller Software Engineer Nokia, Qt Development Frameworks Nokia gate5 GmbH Firmensitz: Invalidenstr. 117, 10115 Berlin, Germany Registergericht: Amtsgericht Charlottenburg, Berlin: HRB 106443 B Umsatzsteueridentifikationsnummer: DE 812 845 193 Geschäftsführer: Dr. Michael Halbherr, Karim Tähtivuori ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator
Re: [Qt-creator] printf() with Qt Creator?
Definitely an issue here. I created a C++ project and added CONFIG += console
to the pro file. The following does NOT print to the console until after main
returns (as shown with a breakpoint)
#include iostream
int main()
{
std::cout test;
return 0;
}
However if I add cout.flush() before the return, the output appears:
#include iostream
int main()
{
std::cout test;
std::cout.flush();
return 0;
}
The CONFIG += console line appears to have NO EFFECT. This must be a recent
regression because I'm sure this used to work. I've not been able to get it to
work at all with stdio.h as I think it lacks a standard function to flush the
buffer.
On 15 Apr 2010, at 08:47, Brad Hubbard wrote:
Berk Demirkır wrote:
A simple program output that prints a lot via printf don't show on
Application Output. But when i close this application output shows. Strange
issue...
Sounds like the output buffer is not being flushed.
Cheers,
Brad
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Re: [Qt-creator] printf() with Qt Creator?
Strange, as was expected, works for me. Could you please attach the
console output of your compiler. And give the information about your
environment.
Thank you.
On 2010/04/24, at 21:25, Danny Price wrote:
Definitely an issue here. I created a C++ project and added CONFIG
+= console to the pro file. The following does NOT print to the
console until after main returns (as shown with a breakpoint)
#include iostream
int main()
{
std::cout test;
return 0;
}
However if I add cout.flush() before the return, the output appears:
#include iostream
int main()
{
std::cout test;
std::cout.flush();
return 0;
}
The CONFIG += console line appears to have NO EFFECT. This must be a
recent regression because I'm sure this used to work. I've not been
able to get it to work at all with stdio.h as I think it lacks a
standard function to flush the buffer.
On 15 Apr 2010, at 08:47, Brad Hubbard wrote:
Berk Demirkır wrote:
A simple program output that prints a lot via printf don't show on
Application Output. But when i close this application output
shows. Strange issue...
Sounds like the output buffer is not being flushed.
Cheers,
Brad
___
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--
Bruno Matos
bruno.ma...@gmail.com
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Re: [Qt-creator] printf() with Qt Creator?
Danny Price wrote:
Definitely an issue here. I created a C++ project and added CONFIG +=
console to the pro file. The following does NOT print to the console
until after main returns (as shown with a breakpoint)
#include iostream
int main()
{
std::cout test;
return 0;
}
This is also an issue in non-Qt apps. Just change this line:
std::cout test;
to this:
std::cout test std::endl;
On some platforms (*nix, I think) you need to do this in order to keep
the next output from overwriting the line test.
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Re: [Qt-creator] printf() with Qt Creator?
OSX 10.6.3 Leopard, Qt 4.6.2, Creator build 1.3.83 (rev 026237b008).
pro:
SOURCES += main.cpp
CONFIG += console
Build log:
Running build steps for project ArrayTest...
Starting: /usr/bin/make clean -w
make: Entering directory `/Users/ks/Projects/ArrayTest-build'
rm -f main.o
rm -f *~ core *.core
make: Leaving directory `/Users/ks/Projects/ArrayTest-build'
Exited with code 0.
Configuration unchanged, skipping qmake step.
Starting: /usr/bin/make -w
make: Entering directory `/Users/ks/Projects/ArrayTest-build'
g++ -c -pipe -g -gdwarf-2 -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5
-Wall -W -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED
-I/usr/local/Trolltech/Qt-4.6.2/mkspecs/macx-g++ -I../ArrayTest
-I/usr/local/Trolltech/Qt-4.6.2/lib/QtCore.framework/Versions/4/Headers
-I/usr/local/Trolltech/Qt-4.6.2/include/QtCore
-I/usr/local/Trolltech/Qt-4.6.2/lib/QtGui.framework/Versions/4/Headers
-I/usr/local/Trolltech/Qt-4.6.2/include/QtGui
-I/usr/local/Trolltech/Qt-4.6.2/include -I. -I../ArrayTest -I.
-F/usr/local/Trolltech/Qt-4.6.2/lib -o main.o ../ArrayTest/main.cpp
g++ -headerpad_max_install_names -arch x86_64 -Xarch_x86_64
-mmacosx-version-min=10.5 -o ArrayTest.app/Contents/MacOS/ArrayTest main.o
-F/usr/local/Trolltech/Qt-4.6.2/lib -L/usr/local/Trolltech/Qt-4.6.2/lib
-framework QtGui -L/usr/local/Trolltech/Qt-4.6.2/lib
-F/usr/local/Trolltech/Qt-4.6.2/lib -framework QtCore
make: Leaving directory `/Users/ks/Projects/ArrayTest-build'
Exited with code 0.
(ArrayTest is just a dummy project I previously created for something else)
On 24 Apr 2010, at 22:21, Bruno Matos wrote:
Strange, as was expected, works for me. Could you please attach the
console output of your compiler. And give the information about your
environment.
Thank you.
On 2010/04/24, at 21:25, Danny Price wrote:
Definitely an issue here. I created a C++ project and added CONFIG
+= console to the pro file. The following does NOT print to the
console until after main returns (as shown with a breakpoint)
#include iostream
int main()
{
std::cout test;
return 0;
}
However if I add cout.flush() before the return, the output appears:
#include iostream
int main()
{
std::cout test;
std::cout.flush();
return 0;
}
The CONFIG += console line appears to have NO EFFECT. This must be a
recent regression because I'm sure this used to work. I've not been
able to get it to work at all with stdio.h as I think it lacks a
standard function to flush the buffer.
On 15 Apr 2010, at 08:47, Brad Hubbard wrote:
Berk Demirkır wrote:
A simple program output that prints a lot via printf don't show on
Application Output. But when i close this application output
shows. Strange issue...
Sounds like the output buffer is not being flushed.
Cheers,
Brad
___
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--
Bruno Matos
bruno.ma...@gmail.com
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Re: [Qt-creator] printf() with Qt Creator?
On 24 Apr 2010, at 22:22, Robert Hairgrove wrote: This is also an issue in non-Qt apps. Just change this line: std::cout test; to this: std::cout test std::endl; On some platforms (*nix, I think) you need to do this in order to keep the next output from overwriting the line test. Thanks it now works! The CONFIG += console line appears to have no effect on OSX either way. I suppose it's really for Windows? I've not been able to get printf to work though, even with a '\n'. ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator
Re: [Qt-creator] printf() with Qt Creator?
Note that endl includes an implicit flush, so this isn't really news. Buffered I/O is buffered I/O and you should never write code that depends on buffered I/O being output before an explicit flush. By the way, IIRC, fflush(stdout) should work for stdio.h I/O. /s/ Adam On Sat, Apr 24, 2010 at 4:51 PM, Danny Price deepblue...@googlemail.com wrote: On 24 Apr 2010, at 22:22, Robert Hairgrove wrote: This is also an issue in non-Qt apps. Just change this line: std::cout test; to this: std::cout test std::endl; On some platforms (*nix, I think) you need to do this in order to keep the next output from overwriting the line test. Thanks it now works! The CONFIG += console line appears to have no effect on OSX either way. I suppose it's really for Windows? I've not been able to get printf to work though, even with a '\n'. ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator
Re: [Qt-creator] printf() with Qt Creator?
thanks for the links - I will definitely read debug.html PS: The reason I considered it Qt Creator list, is that I was specifically asking about stdout not showing up in the Qt Creator GUI's Application Output. However, qDebug() did show up in the Qt Creator Application Output - Original Message - From: Sunil Thaha sunil.th...@gmail.com To: qt-creator@trolltech.com Sent: Tuesday, April 13, 2010 11:22:14 PM GMT -06:00 US/Canada Central Subject: Re: [Qt-creator] printf() with Qt Creator? This should help you - http://sector.ynet.sk/qt4-tutorial/debugging.html , http://doc.trolltech.com/4.6/debug.html BTW: This mailinglist is specific to Qt-Creator issues. You might want to post questions related to Qt in qt-interest mailinglist. Regards, Sunil On Wed, Apr 14, 2010 at 7:00 AM, nobodyhere pem.accounts.s...@gmail.com wrote: I googled for stdout rather than printf, and I came across a special Qt method, qDebug(), and it works: #include QDebug qDebug(qDebug, printf style, %i\n, 5); qDebug() qDebug cout style, 5; I'm not sure about this whole thing about using Qt's version of STL... But I think for this new app I'm making with Qt Designer, I probably will. - Original Message - From: nobodyhere pem.accounts.s...@gmail.com To: qt-creator@trolltech.com Sent: Tuesday, April 13, 2010 3:21:45 PM GMT -06:00 US/Canada Central Subject: printf() with Qt Creator? I created a new Qt4 Gui Application, and did a printf(). The printf() works (ie, goes to the Application Output) when I run via Start Debugging F5. However, it doesn't print when I run via Run, Ctrl+R. :-( ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator
Re: [Qt-creator] printf() with Qt Creator?
nobodyhere wrote: thanks for the links - I will definitely read debug.html PS: The reason I considered it Qt Creator list, is that I was specifically asking about stdout not showing up in the Qt Creator GUI's Application Output. However, qDebug() did show up in the Qt Creator Application Output If you want to use printf() or std::cout you need to add CONFIG += console to your project (.pro) file. Cheers, Brad ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator
Re: [Qt-creator] printf() with Qt Creator?
I googled for stdout rather than printf, and I came across a special Qt method, qDebug(), and it works: #include QDebug qDebug(qDebug, printf style, %i\n, 5); qDebug() qDebug cout style, 5; I'm not sure about this whole thing about using Qt's version of STL... But I think for this new app I'm making with Qt Designer, I probably will. - Original Message - From: nobodyhere pem.accounts.s...@gmail.com To: qt-creator@trolltech.com Sent: Tuesday, April 13, 2010 3:21:45 PM GMT -06:00 US/Canada Central Subject: printf() with Qt Creator? I created a new Qt4 Gui Application, and did a printf(). The printf() works (ie, goes to the Application Output) when I run via Start Debugging F5. However, it doesn't print when I run via Run, Ctrl+R. :-( ___ Qt-creator mailing list Qt-creator@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-creator
