Lazarus and Free Pascal on WSL2

Can a linux FPC-generated 'hello world' be run unmodified on WSL-2 ?

to be done

presume yes. FPC did install from a repository.

Can the linux version of FPC be installed and run unmodified on WSL2 ?

In particular: the program and compiler issue direct kernel calls.

We need to know if this is working, or if a LIBC linked version of the Linux binaries is needed.

Yes

The easiest way is to install through the repository.

Direct Kernel calls work fine under WSL2.

Can a windows executable execute a WSL2 program, in particular, the compiler.

If yes, this must be demonstrated this using a Win32 FPC program.

If not, document what the problems are.

Yes

There's wslwrap (Win32 FPC program) application provided that's executing WSL2 program.

Can the Lazarus IDE execute the WSL2 linux compiler ?

Yes

The only tested approach is a quick substitute of the compiler executable, that runs WSL2 linux compiler.

Can a windows executable execute & debug a WSL2 program using WSL2 gdb ?

(This is assuming that a WSL2 version of gdb exists. If not, document this.).

In particular, can Lazarus use the WSL2 gdb if such exists.

Yes, possible with limitations

Gdb does present in WSL2 and needs to be installed additionally

While it's possible to run WSL2 gdb (and it's surely possible to configure Lazarus to install Gdb)

There are some possible issues with WSL2 pipe redirection, thus some glitches are possible. The official repository has a number of issues related to those problems.

Can the FPC windows 64-bit compiler cross-compile a -Tlinux program using WSL 2. If yes, how ?

to be done; Cross-compiler is not supposed to be using WSL2, it is supposed to be using WSL2. Is it possible to make "cross-compiler" that's using WSL2 linux FPC...

See Also

• WSL