Add compile-time option to build DPsim without libstdc++fs about dpsim

[maikwoehl]

At university we had used kernel calls of a RT patched kernel for in and out. If necessary that could be a way to write to files without the charming easy to use API of stdlib.

Just an idea on this topic.

[stv0g]

Hi @maikwoehl,

what do you mean by "[...] in and out."? Are you referring to std::cout / std::cin?

[maikwoehl]

Hi @stv0g,

I'm specifically referring to the Linux Filesystem Kernel API.

With this you do not need libstdc++-fs... unfortunately I cannot prove this fast. It has been some time ago that I have written linux kernel code.

[stv0g]

Ah okay, so you run DPsim in kernel mode?

[maikwoehl]

No, but you can interface to a kernel module like to a kernel driver and have your own filesystem API if you need that really hard for dpsim on OPAL-RT.

I mean you can install a message based driver and install the output to proc or using the Linux Kernel Filesystems API.

I haven't compiled or used dpsim yet.

[m-mirz]

The filesystem library is used for the logs, load profile reader and CIM file reader.

• logging could be disabled
• load profiles are not necessary for all simulations and can be communicated via VILLASnode, like the results
• the CIM reader is also not strictly necessary... the grid could be described using the C++ API

So, I think that we could disable everything related to filesystem.

[stv0g]

This will be fixed by #168

I have added a standalone implementation of std::filesystem via CMake FetchContent

[leonardocarreras]

This can be closed due to:
#168 was merged