/usr/share/cmake-3.5/Modules/TestForSTDNamespace.cxx is in cmake-data 3.5.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #include <list>
int main(int, char*[])
{
std::list<int>();
return 0;
}
|