error: 'S_IRUSR' was not declared in this scope

[yurivict]

Describe the bug

/usr/local/bin/g++10  -I/disk-samsung/freebsd-ports/cad/opentimer/work/OpenTimer-18d28ff -O2 -pipe -fno-omit-frame-pointer  -fstack-protector-strong -Wl,-rpath=/usr/local/lib/gcc10 -fno-omit-frame-pointer  -Wl,-rpath=/usr/local/lib/gcc10 -O2 -pipe -fno-omit-frame-pointer  -fstack-protector-strong -Wl,-rpath=/usr/local/lib/gcc10 -fno-omit-frame-pointer  -Wl,-rpath=/usr/local/lib/gcc10 -pthread -std=c++17 -MD -MT CMakeFiles/utility.dir/unittest/utility.cpp.o -MF CMakeFiles/utility.dir/unittest/utility.cpp.o.d -o CMakeFiles/utility.dir/unittest/utility.cpp.o -c /disk-samsung/freebsd-ports/cad/opentimer/work/OpenTimer-18d28ff/unittest/utility.cpp
In file included from /disk-samsung/freebsd-ports/cad/opentimer/work/OpenTimer-18d28ff/ot/utility/utility.hpp:5,
                 from /disk-samsung/freebsd-ports/cad/opentimer/work/OpenTimer-18d28ff/unittest/utility.cpp:4:
/disk-samsung/freebsd-ports/cad/opentimer/work/OpenTimer-18d28ff/ot/utility/logger.hpp: In member function 'void ot::Logger::redir(const string&)':
/disk-samsung/freebsd-ports/cad/opentimer/work/OpenTimer-18d28ff/ot/utility/logger.hpp:157:64: error: 'S_IRUSR' was not declared in this scope
  157 |   int fd = ::open(fpath.c_str(), O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
      |                                                                ^~~~~~~

Reason: #include <sys/stat.h> is missing.

OS: FreeBSD 13