It's possible to compile and link programs that use std::filesystem with
the g++ 9.2.0 compiler for Cygwin. For instance if I place the following
program into a file name "x.cpp":
#include <iostream>
#include <filesystem>
int main()
{
std::filesystem::path p{"/tmp"};
std::cout << p << std::endl;
}
Then compile with:
g++ -std=c++2a -Wall -O3 x.cpp
It builds successfully. But running the output "a.exe" file exits
immediately with exit code 127. It does not help if I also add
"-lstdc++fs" to the build command.
The output of "uname -a" is:
CYGWIN_NT-6.1 price1 3.1.2(0.340/5/3) 2019-12-21 15:25 x86_64 Cygwin
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