I'm going crazy because of Mac OSX and Qt!
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My Mac OSX machine with the latest version of Mac OS X has worked perfectly with Qt 5.9.2.
But today, after a one month without to compile something with this machine and after some Apple uptades, when i try to compile something with Qt I obtain the error:error: Qt requires a C++11 compiler and yours does not seem to be that.
error: "Qt requires C++11 support"The command line tools are installed and seems to be ok because I can compile an application using Lazarus / Freepascal.
I tryed the lates Qt 5.10.0 but I obtain the same error.What can I do to resolve?
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Skype: mrdebug -
Hi,
What version of Xcode are you using ?
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After Mac updates it is better to make Xcode refresh its tools and components. You can do that from the preferences. If that does not work you may need to go and get the latest command line tools for the Xcode, update Xcode altogether or possibly use and older version of Xcode that better suits the Qt you are using.
I find that it is usually possible to tweak the latest Xcode to work with the latest versions of Qt.
I assume you have this "CONFIG += c++11" in you profile just in case?? Not sure if you need that anymore with the latest version of Qt.
I currently use Qt 5.9.2 on macOS High Sierra version 10.3.3 Xcode version 92 (9C40b) and do not see any problems.
My Mac also updated to that just recently too... -
Xcode 9.2, 9C40b
Latest Command line tools.After having update Xcode and the command line tools at the latest version, after having uninstall and reinstall Qt framwerork, I have the same problem.
Lazarus / Freepascal is working without any problem.Please have a look at the attached image.
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What does the compile output show ?
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My Mac OSX machine with the latest version of Mac OS X has worked perfectly with Qt 5.9.2.
But today, after a one month without to compile something with this machine and after some Apple uptades, when i try to compile something with Qt I obtain the error:error: Qt requires a C++11 compiler and yours does not seem to be that.
error: "Qt requires C++11 support"The command line tools are installed and seems to be ok because I can compile an application using Lazarus / Freepascal.
I tryed the lates Qt 5.10.0 but I obtain the same error.What can I do to resolve?
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@Diracsbracket you too?
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Has someone got any idea to solve?
Need programmers to hire?
www.labcsp.com
www.denisgottardello.it
GMT+1
Skype: mrdebug -
@mrdebug
Hi,
I've just had a look into the header fileqcompilerdetection.h(see this link) as it is the one raising the error in your screenshot. I searched for your error and found only 1 occurence for it in the file:559 #ifdef __cplusplus 560 # if __cplusplus < 201103L && !defined(Q_CC_MSVC) 561 # error Qt requires a C++11 compiler and yours does not seem to be that. 562 # endif 563 #endifSo, I tried to check the value of
__cplusplusin my case, by putting the following in e.g.main.cpp:#define DISPLAY_VALUE2(x) #x #define DISPLAY_VALUE(x) DISPLAY_VALUE2(x) #pragma message(DISPLAY_VALUE(__cplusplus))It shows that on my system, the value is
201103L, thus OK.
What does it show when you use it?
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@mrdebug
In addition, the Makefile of my test program has the following line:CXXFLAGS = -pipe -stdlib=libc++ -g -std=gnu++11 $(EXPORT_ARCH_ARGS) -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk -mmacosx-version-min=10.10 -Wall -W -fPIC $(DEFINES)The interesting part here is
-std=gnu++11.
Would addingQMAKE_CXXFLAGS += -std=gnu++11in your.profile make any difference? -
After may hours spent on searching the solution I have moved the project in another directory. Now the project (without any editing) was been compiled.
After that I have moved the project in its own default directory. After a clean the project was been compiled without any problem. -
What were the paths ?
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And just moving it fixed the issue ?
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Strange indeed. Oh well, the essential is that you have it working now.
