ifstream no matching constructor for initialization - c++

Question

I'm using QT Creator and MinGW (both latest versions) and am having trouble getting the ifstream to use the path argument constructor added in c++17.
Compiling the below code will fail with:
no matching constructor for initialization of 'std::ifstream'
I've got CONFIG += c++17 in my QT .pro file and LIBS += -lstdc++fs
MCV
https://gcc.godbolt.org/z/Lb3MNT
#include <experimental/filesystem>
#include <fstream>
int main() {
const std::experimental::filesystem::path my_path = "C:/";
std::ifstream input_file_stream(my_path);
}

Answer 1

# user1406186, I replicated your same error, and was able to compile it applying the following changes to the .pro file and had to specify the QMAKE I needed to use:
TEMPLATE = app
CONFIG += console c++11
QMAKE_CXXFLAGS += -std=gnu++11
CONFIG -= app_bundle
CONFIG -= qt
SOURCES += \
main.cpp
HEADERS +=
LIBS += -lstdc++fs
It also compiled with the following C++14/C++11 standards:
TEMPLATE = app
CONFIG += console c++14
QMAKE_CXXFLAGS += -std=gnu++14
CONFIG -= app_bundle
CONFIG -= qt
SOURCES += \
main.cpp
HEADERS +=
LIBS += -lstdc++fs

Answer 2

#include<string>
#include<experimental\filesystem>
using namespace std;
using namespace experimental::filesystem;
int main()
{
path soure{current_path()};
soure /="test.txt";
ifstream input{u8path(soure).u8string()};
if(!input)
{
cout<<"source file not exist"<<endl;
}
path dest{current_path()};
dest /="test-copy.txt";
ofstream output{u8path(dest).u8string()};
string line;
while(!getline(input,line).eof())
{
output<<line<<endl;
}
input.close();
output.close();
return 0;
}