[fpc-pascal] Cross-compile for Linux Arm (RaspberryPi) on Windows 10?

[Bo Berglund]

On Sat, 25 Mar 2023 23:25:07 +0100, Bo Berglund via fpc-pascal
<fpc-pascal at lists.freepascal.org> wrote:

>I have latest Lazarus/Fpc on my Windows 10 main computer, but also on a number
>of RaspberryPi (3 and 4) devices. If I create an application on Windows and want
>to build the same for RPi, then I have to transfer the sources (via Subversion)
>to the RPi and build there.
>
>And doing so requires me to use VNC to connect to the RPi, which is less than
>optimal.
>
>Now I wonder how to set up FPC on Windows to cross-compile for Raspberry Pi
>(arm6/arm7 processor and Debian based Linux)?
>
>The freepascal Wiki articles I have found are either outdated or do not describe
>enough in detail how one can do this...
>
>So is there some up-to-date article describing it?

I have found this: https://wiki.freepascal.org/Cross_compiling

and it actually mentions RaspberryPi in passing, so I guess that is encouraging.

Since I have RPi units with Lazarus/FPC installed there is also a directory:

$HOME/lib/fpc/3.2.2/units which contains subdir arm-linux

If I tar this arm-linux dir I get a file arm-linux.tgz which is about 52 MB in
size.

Do I extract this into my Windows FPC 3.2.2 installation somewhere in order to
be able to cross-compile?

Below the Lazarus installation dir /dev/lazarus/2.2.4 I also have this dir:

/dev/lazarus/2.2.4/units/arm-linux and this is 233 KB in size.
Do I tar and copy this too into my Windows Lazarus/FPC installation?

It contains only 2 subdirs:
/dev/lazarus/2.2.4/units/arm-linux/gtk2
/dev/lazarus/2.2.4/units/arm-linux/nogui

If so, where do I deposit these files on Windows?
I have used the SourceForge installer to get the Lazarus 2.2.4 installed.

Do I drop them off into a new ...\fpc\3.2.2\units\arm-linux directory even
though they came from two different places on the live system?

Grateful for some advice, I have never done this ever before...


-- 
Bo Berglund
Developer in Sweden