Hello, Michael.
I have used C++, CMake, and MSYS2 together successfully before. Can you
try using the -G"MSYS Makefiles" argument instead of the one you are using
and see if that changes anything? We usually use the "MSYS Makefiles"
generator.
Also, isn't there some way to make a CMake Makefile print out the actual
commands it's running? Try "make VERBOSE=YES".
Also, while you are still debugging this, I would recommend not using "-j4"
because that can only make things worse when you're debugging a Makefile.
--David Grayson
On Thu, Oct 13, 2016 at 5:23 AM, Drobig, Michael, IN <
michael.dro...@asap-com.eu> wrote:
> Hello,
>
>
>
> i have got problems compiling a simple „Hello World“ like c++ Project
> with a fresh Msys2 installation and a MinGW64 Toolchain on Windows 7.
>
> Im using cmake to create the project.
>
>
>
> *CMakeLists.txt*
>
>
>
> cmake_minimum_required( VERSION 3.0 )
>
> project( helloName )
>
> add_executable(helloName main.cpp)
>
>
>
>
>
>
>
> *main.cpp*
>
>
>
> #include<iostream>
>
> using namespace std;
>
>
>
> int main()
>
> {
>
> string name;
>
> cout << "Hello! Whats your name?";
>
> cin >> name;
>
> cout << "Hi, my name is " << name;
>
>
>
> return 0;
>
> }
>
>
>
>
>
> The following “cmake” operation works fine:
>
>
>
> cmake -G"Eclipse CDT4 - Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug
> -DCMAKE_ECLIPSE_VERSION=4.6.1 -DCMAKE_CXX_COMPILER_ARG1=-std=c++11
>
>
>
> But if I try “make –j4” I got the error:
>
>
>
> [ 50%] Building CXX object CMakeFiles/helloName.dir/main.cpp.obj
>
> [100%] Linking CXX executable helloName
>
> CMakeFiles/helloName.dir/main.cpp.obj: In function `main':
>
> C:/Work/DevEnv/mingw64_checking/main.cpp:6: undefined reference to
> `std::__cxx11::basic_string<char, std::char_traits<char>,
> std::allocator<char> >::basic_string()'
>
> C:/Work/DevEnv/mingw64_checking/main.cpp:7: undefined reference to
> `std::basic_ostream<char, std::char_traits<char> >& std::operator<<
> <std::char_traits<char> >(std::basic_ostream<char,
> std::char_traits<c har> >&, char const*)'
>
> C:/Work/DevEnv/mingw64_checking/main.cpp:8: undefined reference to
> `std::basic_istream<char, std::char_traits<char> >& std::operator>><char,
> std::char_traits<char>, std::allocator<char> >(std::basic_istre
> am<char, std::char_traits<char> >&, std::__cxx11::basic_string<char,
> std::char_traits<char>, std::allocator<char> >&)'
>
> C:/Work/DevEnv/mingw64_checking/main.cpp:9: undefined reference to
> `std::basic_ostream<char, std::char_traits<char> >& std::operator<<
> <std::char_traits<char> >(std::basic_ostream<char,
> std::char_traits<c har> >&, char const*)'
>
> C:/Work/DevEnv/mingw64_checking/main.cpp:9: undefined reference to
> `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char,
> std::char_traits<char>, std::allocator<char> >(std::basic_ostr
> eam<char, std::char_traits<char> >&, std::__cxx11::basic_string<char,
> std::char_traits<char>, std::allocator<char> > const&)'
>
> C:/Work/DevEnv/mingw64_checking/main.cpp:6: undefined reference to
> `std::__cxx11::basic_string<char, std::char_traits<char>,
> std::allocator<char> >::~basic_string()'
>
> C:/Work/DevEnv/mingw64_checking/main.cpp:6: undefined reference to
> `std::__cxx11::basic_string<char, std::char_traits<char>,
> std::allocator<char> >::~basic_string()'
>
> CMakeFiles/helloName.dir/main.cpp.obj: In function `__tcf_0':
>
> C:/msys64/mingw64/include/c++/6.2.0/iostream:74: undefined reference to
> `std::ios_base::Init::~Init()'
>
> CMakeFiles/helloName.dir/main.cpp.obj: In function
> `__static_initialization_and_destruction_0':
>
> C:/msys64/mingw64/include/c++/6.2.0/iostream:74: undefined reference to
> `std::ios_base::Init::Init()'
>
> CMakeFiles/helloName.dir/main.cpp.obj:main.cpp:(.data+0x0): undefined
> reference to `__gxx_personality_seh0'
>
> CMakeFiles/helloName.dir/main.cpp.obj:main.cpp:(.xdata+0xc): undefined
> reference to `__gxx_personality_seh0'
>
> CMakeFiles/helloName.dir/main.cpp.obj:main.cpp:(.rdata$.
> refptr._ZSt3cin[.refptr._ZSt3cin]+0x0): undefined reference to `std::cin'
>
> CMakeFiles/helloName.dir/main.cpp.obj:main.cpp:(.rdata$.
> refptr._ZSt4cout[.refptr._ZSt4cout]+0x0): undefined reference to
> `std::cout'
>
> collect2.exe: error: ld returned 1 exit status
>
> make[2]: *** [CMakeFiles/helloName.dir/build.make:95: helloName] Fehler 1
>
> make[1]: *** [CMakeFiles/Makefile2:68: CMakeFiles/helloName.dir/all]
> Fehler 2
>
> make: *** [Makefile:84: all] Fehler 2
>
>
>
>
>
> Thank you,
>
>
>
> Michael
>
>
>
>
>
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>
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