[SOLVED] qtCreator doesn't build my project since I update to Mountain Lion

sfilippidis

DISCLAIMER: use at your own risk and don't blame me if this procedure deletes precious files from your machine etc! :-)

Let me tell you what I did when updating from Snow Leopard to Mountain Lion:

Uninstalled Qt SDK using the respective option at SDK's updater.
Installed the latest XCode from Mac App Store.
From XCode, from the menu XCode --> Preferences --> Downloads, I downloaded Command Line Tools.
I reinstalled Qt SDK.

rikytres

I decided to do what you suggested... but i start from download last version of Xcode and then download the command line tools...

Then I deleted the QtSDK and I'm gonna to re-install it...

rikytres

The situation start to be very stressful... -_-
I reinstalled QtCreator, and now QtCreator can see all the compiler.

But...
when I open my project and compile it the compiler return me the follow errors...

../CalcolatriceSensibile/mainTest.cpp: In instantiation of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]':
../CalcolatriceSensibile/mainTest.cpp:16: instantiated from here
../CalcolatriceSensibile/mainTest.cpp:16: error: explicit instantiation of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]' but no definition available
../CalcolatriceSensibile/mainTest.cpp: In instantiation of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]':
../CalcolatriceSensibile/mainTest.cpp:16: instantiated from here
../CalcolatriceSensibile/mainTest.cpp:16: error: explicit instantiation of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]' but no definition available
../CalcolatriceSensibile/mainTest.cpp: In instantiation of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]':
../CalcolatriceSensibile/mainTest.cpp:16: instantiated from here
../CalcolatriceSensibile/mainTest.cpp:16: error: explicit instantiation of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]' but no definition available
make: *** [mainTest.o] Error 1

I can't understand why this error...

rikytres

In particular the compiler give this error three times at the same row's code...

/Users/TresMac/Developing Project/C++/CalcolatriceSensibile-build-desktop-Desktop_Qt_4_7_4_for_GCC__Qt_SDK__Debug/../CalcolatriceSensibile/mainTest.cpp:16: error: explicit instantiation of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]' but no definition available

rikytres

I found that tis problem come out when i use the operator << with cout on a std:.string variable.

For exemple this code give mi problems:
@#include<string>
#include<iostream>
std::string exemple = "exemple";
std::cout<<exemple;@

zetavision

I have the same operator << problem. Does Anyone know how to solve it?

garrgravarr

Yes!!

I had the same problem with the
"explicit instantiation of 'std:basic_ostream<..'"

I tried out the flags that Qt used to compile a simple main routine. Seems it works if you say
-mmacosx-version-min=10.7
instead of
-mmacosx-version-min=10.5

There are no sdks for 10.5 or 10.6 on Mountain Lion and XCode 4.4!

Hope that helped.

cheers,

tim

garrgravarr

btw, the entries with

-mmacosx-version-min=10.5

can be found in

$QTDIR/mkspecs/common/g++-macx.conf

.

cheers again...

zetavision

Great! I just found that conf. It works now. Thanks a lot. :)

rikytres

Perfect!! Now it works!!
Thanks a lot!

gosuperninja

Changing the mkspec file to -mmacosx-version-min=10.5 worked for me.

This one was real obscure. Does anyone have reason why this would break std iostream functions? At first I thought it was change in the gcc version with Mountain Lion.

Also, this appears to only effect gcc. Clang doesn't seem to have a problem with min-version is seto to 10.5

tobias.hunger

Did you guys "file a bug report":http://bugreports.qt-project.org/ ? This needs fixing in Qt.

JMLA

This is nice, but on my MacBookPro with ML (and a brand new XCode) I still get an error like

11:09:29: Configuration unchanged, skipping qmake step.
11:09:29: Could not start process "make" -w
Error while building project ImportMML (target: Desktop)
When executing build step 'Make'

What do you recommend ? Thanks ? jm

gosuperninja

JMLA, In the latest xcode the command line tools aren't installed by default. Look in Xcode->preferences->downloads. Select "Command Line Tools". Once you do this you may need to re-open QtCreator. But if this is the problem I would have expected Qt to complain earlier about not finding the tool chain.

JMLA

Thanks gosuperninja! It probably helps. Nevertheless the error code is now as below
(I turned back to one of the QT basic drawing examples, that has always been working!)
I am afraid I might be forced, to continue my work, to go for a while through Parallels... (:-(
(I have added on Qt Creator/Preferences.../Build & Run/Manual GCC with correct paths)

17:52:58: Running build steps for project basicdrawing...
17:52:58: Starting: "/usr/bin/make" clean -w
make: Entering directory /Users/JML/QtSDK/Examples/4.7/painting/basicdrawing' rm -f moc_renderarea.cpp moc_window.cpp rm -f qrc_basicdrawing.cpp rm -f main.o renderarea.o window.o moc_renderarea.o moc_window.o qrc_basicdrawing.o rm -f *~ core *.core make: Leaving directory /Users/JML/QtSDK/Examples/4.7/painting/basicdrawing'
17:52:58: The process "/usr/bin/make" exited normally.
17:52:58: Running build steps for project ImportMML...
17:52:58: Starting: "/usr/bin/make" clean -w
make: Entering directory /Users/JML/Desktop/Import_MML/ImportMML' rm -f moc_mainwindow.cpp rm -f ui_mainwindow.h rm -f main.o mainwindow.o qtmmlwidget.o moc_mainwindow.o rm -f *~ core *.core make: Leaving directory /Users/JML/Desktop/Import_MML/ImportMML'
17:52:58: The process "/usr/bin/make" exited normally.
17:52:58: Running build steps for project basicdrawing...
17:52:58: Configuration unchanged, skipping qmake step.
17:52:58: Starting: "/usr/bin/make" -w
make: Entering directory /Users/JML/QtSDK/Examples/4.7/painting/basicdrawing' g++-4.2 -c -pipe -g -gdwarf-2 -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.7 -Wall -W -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I../../../../Desktop/Qt/4.8.1/gcc/mkspecs/macx-g++42 -I. -I../../../../Desktop/Qt/4.8.1/gcc/lib/QtCore.framework/Versions/4/Headers -I../../../../Desktop/Qt/4.8.1/gcc/include/QtCore -I../../../../Desktop/Qt/4.8.1/gcc/lib/QtGui.framework/Versions/4/Headers -I../../../../Desktop/Qt/4.8.1/gcc/include/QtGui -I../../../../Desktop/Qt/4.8.1/gcc/include -I. -F/Users/JML/QtSDK/Desktop/Qt/4.8.1/gcc/lib -o main.o main.cpp make: g++-4.2: No such file or directory make: *** [main.o] Error 1 make: Leaving directory /Users/JML/QtSDK/Examples/4.7/painting/basicdrawing'
17:52:58: The process "/usr/bin/make" exited with code 2.
Error while building project basicdrawing (target: Desktop)
When executing build step 'Make'

gosuperninja

JMLA, That issue isn't related to Mountain Lion. I had that one a bit ago. It has to do with QtCreator, there was a bug submitted about it. I'm using Qt Creator 4.5, it appears to be fixed. Maybe you're using 4.4? In any case it's a problem with the mkspec file that QtCreator picks, macx-g++42. It should be macx-g++. In the project settings override the spec and it should get past that issue. Hopefully thats your last problem :)

gosuperninja

FYI, I created a bug for the mmacosx-version-min=10.5 issue, https://bugreports.qt-project.org/browse/QTBUG-26734

elbunce

If you still want to compile and target 10.5 you need to install the 10.5 SDK. Alas it is not included with Xcode 4.4. It's a bit hacky, but the following works...

Grab the xcode_3.2.6_and_ios_sdk_4.3.dmg from the developer.apple.com downloads area, and then:
@
open xcode_3.2.6_and_ios_sdk_4.3.dmg
cd /Volumes/Xcode\ and\ iOS\ SDK/Packages
open MacOSX10.5.pkg
@

Make sure to select the appropriate install directory (i.e. /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer). You can substitute 'open MacOSX10.5.pkg' for 10.5 support.

After installing the old SDK you'll need to add some symlinks:
@
cd "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.5.sdk/usr/include/c++/4.2.1/"
ln -s i686-apple-darwin9 i686-apple-darwin11
ln -s x86_64-apple-darwin9 x86_64-apple-darwin11
@

This worked for me. A similar hack can be used to get the 10.6 SDK, although you may want to grab that out of a later version of xCode... Best of luck!

Thanks and Enjoy,
Erik

ziller

Usually you wouldn't need to use the 10.5 SDK to target 10.5, actually that is what the -mmacosx-version-min=10.5 flag is supposed to do: Put the SDK that you use into a mode that is "compatible" with 10.5. I.e. you are supposed to be able to use the 10.7 SDK but still target 10.5 with that flag.

So I wonder why the 10.8 SDK fails in that regard. Probably either a bug, or even more probable Apple just dropped support for developing for 10.5 (which wouldn't surprise me).

mjepson

I have just installed Qt Creator in my Mac OS X Mountain Lion. I want to use it with OpenCV 2.4.2, but that is the next step.

I know how to do stuff in Windows, but for some reason I can't get it to work in Mac OS X. At first I got a load of weird errors in the OpenCV files, but now I have limited them to the lines with cout in them.
I have created a test project with just a std::cout << "test" << std::endl; call in it and it won't compile, saying cout is not a member of std.

I have tried altering the file g++-macx.conf, inserting -mmacosx-version-min=10.7 and *10.8 where it originally said *10.5, but it didn't help.

What I have done:
I have installed XCode and through XCode I have installed the command line clients. I can find the gcc and g++ compilers in /usr/bin, so I reckon these are in place.

What can I try next? I don't have any other clues now. Any help is greatly appreciated.