clang++ under QtCreator can't work with c++11

问题:

OS : OS X 10.8.1 QtCreator : 2.6.2

Command line is fine, but QtCreator fail to compile the codes.

#include <functional> #include <iostream> #include <memory> #include <string> #include <vector>  int main(int argc, const char * argv[]) {     std::vector<std::string> strs{"yahoo", "haha"};     for(auto const &data : strs){         std::cout<<data<<std::endl;     }      std::vector<std::string> strs2 = std::move(strs);      std::unique_ptr<int> A(new int(3));     std::cout<<*A<<std::endl;      return 0; } 

Command line :

clang++ -stdlib=libc++ -std=c++11 main.cpp -o test 

Compiler setting of QtCreator http://www.flickr.com/photos/92283971@N04/8453188038/in/photostream

Qt .pro file

TEMPLATE = app CONFIG += console CONFIG -= app_bundle CONFIG -= qt  SOURCES += main.cpp  QMAKE_CXXFLAGS += -std=c++11  QMAKE_CXXFLAGS += -stdlib=libc++ 

Error message:

clang: error: invalid deployment target for -stdlib=libc++ (requires OS X 10.7 or later) make: *** [main.o] Error 1

But my OS number is 10.8.1

回答1:

TEMPLATE = app CONFIG += console CONFIG -= app_bundle CONFIG -= qt  SOURCES += main.cpp  LIBS += -stdlib=libc++  QMAKE_CXXFLAGS += -stdlib=libc++ QMAKE_CXXFLAGS += -std=c++11 QMAKE_CXXFLAGS += -mmacosx-version-min=10.7 QMAKE_LFLAGS += -mmacosx-version-min=10.7 

I can compile the codes by this .pro file But there are warning when you play with Qt library

ld: warning: directory not found for option ‘-F/Users/yyyy/Qt5.0.1/5.0.1/clang_64/qtbase/lib’ After some research, I find out this is a bug of Qt5 It is ok if you ignore this warning message even it is annoying

回答2:

After some research, I find out that the error messages could be solved by adding a flag to the .pro file

TEMPLATE = app CONFIG += console CONFIG -= app_bundle CONFIG -= qt  SOURCES += main.cpp  QMAKE_CXXFLAGS += -stdlib=libc++ QMAKE_CXXFLAGS += -std=c++11 #QMAKE_CXXFLAGS += -mmacosx-version-min=10.7 #1 QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.7 #2 

1 and #2 do get rid of the error message

error message clang: error: invalid deployment target for -stdlib=libc++ (requires OS X 10.7 or later) but they also generate another error message

ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

symbol not found, but I have no idea what which .a should I link to?

回答3:

This seemed to do the trick for me.

CONFIG += c++11

It correctly put -std=c++11 in the command line and I didn't get any compiler or linker errors.

Using Qt 5.2.

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