在Mac上使用Intel编译器编译C ++代码时出现错误：预期为标识符

Question

My laptop can not compile a simple c++ code since yesterday, it works perfectly fine before.

The c++ code is can be a hello-world code in main.cpp file.

#include <iostream>

using namespace std;

int main(int argc, char** argv)
{
    cout<<"Hello World"<<endl;

    return 0;
}

I am trying to compile the code by

icpc main.cpp

The error information is

In file included from /Library/Developer/CommandLineTools/usr/include/c++/v1/algorithm(637), from /Library/Developer/CommandLineTools/usr/include/c++/v1/__string(56), from /Library/Developer/CommandLineTools/usr/include/c++/v1/string_view(171), from /Library/Developer/CommandLineTools/usr/include/c++/v1/string(470), from /Library/Developer/CommandLineTools/usr/include/c++/v1/__locale(15), from /Library/Developer/CommandLineTools/usr/include/c++/v1/ios(216), from /Library/Developer/CommandLineTools/usr/include/c++/v1/iostream(38), from main.cpp(1): /Library/Developer/CommandLineTools/usr/include/c++/v1/type_traits(2065): error: expected an identifier : public decltype((_VSTD::__is_assignable_test<_Tp, _Arg>(0))) {};

compilation aborted for main.cpp (code 2)

A few information:

• I am using icpc (ICC) 17.0.4 20170411, it is installed from Intel® Parallel Studio XE Composer Edition for C++ macOS.

• My mac is MacBook Pro (15-inch, 2017), version 10.12.6.

• If I use gnu compiler, it works fine. While my code needs to use intel's compiler.

• The code works before, do not know while it becomes this. I have already tried restarting the systems.

====================================================================== Update1 : The problem happened after I update my "Command Line Tools for Xcode". It looks like the /Library/Developer/CommandLineTools/usr/include/c++/ is not right.

====================================================================== Update2 : This is can be solved by using icpc -std=c++11 main.cpp

However when I change my main.cpp to

#include <iostream> 
#include <vector>
#include <tuple>

using namespace std;

tuple<vector<int>, vector<int>, vector<int>> 
getAllBlockMeanErrorTuple(const vector<int> &vec)
{
    vector<int> fact, mean, err;
    fact.resize( vec.size() );
    mean.resize( vec.size() );
    err.resize(  vec.size() );
    return make_tuple(fact, mean, err);
}


int main(int argc, char** argv)
{
    cout<<"Hello World"<<endl;

    return 0; 
}

It has error again even if I use icpc -std=c++11 main.cpp

/Library/Developer/CommandLineTools/usr/include/c++/v1/__tuple(401): error: type name is not allowed
  -> __all<typename enable_if<_Trait<_LArgs, _RArgs>::value, bool>::type{true}...>;

      detected during:

Answer 1

I encountered the same issue while upgrading command line tools to the version of September 2017

While not finding a proper solution, I reinstalled previous version ( April 2017) of command line tools and it solved the problem ( https://developer.apple.com/download/more/# ).

I am looking forward to having a clean solution.

EDIT (5/12/17): I solved the issue by recompiling everything using gcc. At compilation, Intel compilers will use the compiler that responds to gcc and g++ in the path. An installation with homebrew and some symlink in /usr/local/bin pushes the newly installed gcc in front of clang and then avoids gcc to change at each system update. Hope it helps.

Answer 2

Try to check that you are using right settings and GNU is working because it automatically set to C++ try to set compiler to c++ hope this works. OR You can use xcode to write c++ Code.