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sunwoo
Beginner
994 Views

icpc does not work with "--std=c++17" on (ICC) 19.0.4.243 20190416

icpc shows the following error when it is compiled with "-std=c++17"  However, it is okay with "-std=c++11" and "-std=c++14".

     ICPC version: 19.0.4.243 20190416

     OS : RHEL 7.6 / X86-64

--------------------------------

icpc -std=c++17  -ltbb foo.cpp -o foo
/tmp/icpcSHeQQ3.o: In function `main':
foo.cpp:(.text+0x46): undefined reference to `__builtin_is_constant_evaluated'

 

<<< foo.cpp  >>

#include <vector>

#include <iostream>

#include <string>

using namespace std;

int main(int argc, char** argv) {

   int n = stoi(argv[1]);

    vector<int> vec(10);

    return 0;

}

 

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4 Replies
Viet_H_Intel
Moderator
994 Views

I don't have RHEL7.6, but tried on 7.4 and didn't see the error.
spdlvme080 tmp]$ cat foo.cpp
#include <vector>

#include <iostream>

#include <string>

using namespace std;

int main(int argc, char** argv) {

   int n = stoi(argv[1]);

    vector<int> vec(10);

    return 0;

}
spdlvme080 tmp]$ icpc foo.cpp  -std=c++17  -ltbb
spdlvme080 tmp]$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.4 (Maipo)
spdlvme080 tmp]$

 

Bastian_B_
New Contributor I
994 Views

I had a similar issue (error referring to builtin_is_constant_evaluated), but with the following differences:

1) It was a new error that came when I upgraded the gcc backend to gcc 9, due to the fact that there are such sections in GCC headers:

# if __GNUC__ >= 9
#  define _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED 1
# endif

...

#if __cplusplus >= 201402L
#ifdef _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED
    if (__builtin_is_constant_evaluated())
#else
    if (__builtin_constant_p(__x > __y))
#endif
#endif

2) The problem only arose when using -std=c++14 or higher, as can be seen from the lines above.
3) It was fixed when I upgraded the Intel Compiler from 2019.3.199 to 2019.4.243.

Which gcc version are you using as the backend?

Bastian_B_
New Contributor I
994 Views

I now ran your test case and found out that the error I had been seeing with 2019.3.199 was a compile time error (rather than an undefined reference):

In file included from /cvmfs/sft.cern.ch/lcg/releases/gcc/9.1.0.1-0b417/x86_64-centos7/bin/../include/c++/9.1.0/bits/ios_base.h(46),
                from /cvmfs/sft.cern.ch/lcg/releases/gcc/9.1.0.1-0b417/x86_64-centos7/bin/../include/c++/9.1.0/ios(42),
                from /cvmfs/sft.cern.ch/lcg/releases/gcc/9.1.0.1-0b417/x86_64-centos7/bin/../include/c++/9.1.0/ostream(38),
                from /cvmfs/sft.cern.ch/lcg/releases/gcc/9.1.0.1-0b417/x86_64-centos7/bin/../include/c++/9.1.0/iostream(39),
                from foo.C(1):
/cvmfs/sft.cern.ch/lcg/releases/gcc/9.1.0.1-0b417/x86_64-centos7/bin/../include/c++/9.1.0/bits/stl_function.h(437): error: identifier "__builtin_is_constant_evaluated" is undefined
       if (__builtin_is_constant_evaluated())
           ^

compilation aborted for foo.C (code 2)

And I can confirm the link time error you are seeing with 2019.4.243:

$ cat foo.C
#include <iostream>

int main() {
 std::cout << "hello" << std::endl;
 return 0;
}
 

$ icpc -v
icpc version 19.0.4.243 (gcc version 9.1.0 compatibility)

$ icpc -std=c++17 -o foo foo.C
ld: /tmp/icpcr89KGh.o: in function `std::char_traits<char>::length(char const*)':
foo.C:(.text._ZNSt11char_traitsIcE6lengthEPKc[_ZNSt11char_traitsIcE6lengthEPKc]+0x6): undefined reference to `__builtin_is_constant_evaluated'
 

sunwoo
Beginner
994 Views

To Bastian:

Thank you for the confirmation on the error and sharing the details on the cause of the error.

I confirmed that 

    *   icpc --std=c++17 is fine with g++ 7.3.1.

     * icpc --std=c++17 generates the errow when g++ is 9.1

I am currently using the latest icpc, which is  19.0.4.243 (gcc version 9.1.0 compatibility)

Here are my tests.

$ source /opt/intel/bin/iccvars.sh intel64
$ gcc --version

g++ (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ icpc --version
icpc (ICC) 19.0.4.243 20190416
Copyright (C) 1985-2019 Intel Corporation.  All rights reserved.

$ icpc -std=c++17 foo.cpp   <-- it is fine !!!

$source gcc91ActiviationShellScript
$ gcc --version
gcc (GCC) 9.1.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


$ source /opt/intel/bin/iccvars.sh intel64
(base) [sunwoo@localhost cpp]$ icpc -std=c++17 foo.cpp 
/tmp/icpcfC3MFV.o: In function `main':
foo.cpp:(.text+0x46): undefined reference to `__builtin_is_constant_evaluated'
(base) [sunwoo@localhost cpp]$ 
 

To Viet:

Thank you for testing this.

As I mentioned above, if you use g++ 9.1.0, I think you will get the same error.

 

Thanks,

 

 

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