Cross compiling Linux 64 to Linux 32 ?
lazarus / 1-Linux

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patyi · 2014-07-27 17:42

Hi all !

I just installed Linux Mint Cinnamon (LMDE) AMD64 rolling release,
Lazarus 64bit with fpcup_linux_x64 utility.
Everything is perfect on 64bit, but now need to build Linux 32bit
application.
I study cross compiling on wiki, googling the net, but I don't find
any sample how to do this when it is installed with fpcup.
I mean dir structure, the way how fpcup is done the local
installation.
I try methods described on wiki, but this is for standard fpc
installation ... (adopted to my dir paths, and  got bunch of errors)

What have to do to build 32bit cross compiler, pleas if possible step
by step instruction !

Thanks, Patyi.

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BigChimp · 2014-07-28 07:52

Interesting!

Quote from: patyi on July 27, 2014, 07:42:41 pmI try methods described
on wiki, but this is for standard fpc installation ... (adopted to my
dir paths, and  got bunch of errors)
1. You'll see in the table on the fpcup page that linux x64=>x32 is
not supported. It may work, no idea.
2. Make sure you have the 32 bit libs and binutils in the right place.
Otherwise, "get a bunch of errors" is so vague that nobody can even
try to help you based on that. See the first link in my signature.

Quote from: patyi on July 27, 2014, 07:42:41 pmWhat have to do to
build 32bit cross compiler, pleas if possible step by step instruction
!
http://wiki.lazarus.freepascal.org/Cross_compiling

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Leledumbo · 2014-07-28 11:19

Quote from: BigChimp on July 28, 2014, 09:52:21 am1. You'll see in the
table on the fpcup page that linux x64=>x32 is not supported. It may
work, no idea.
Certainly it is, I'm on x86_64-linux and I can compile i386-linux just
fine. Remember you must have ALL required lib32 version of the
libraries, though.

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BigChimp · 2014-07-28 11:45

Quote from: Leledumbo on July 28, 2014, 01:19:47 pmQuote from:
BigChimp on July 28, 2014, 09:52:21 am1. You'll see in the table on
the fpcup page that linux x64=>x32 is not supported. It may work, no
idea.
Certainly it is, I'm on x86_64-linux and I can compile i386-linux just
fine. Remember you must have ALL required lib32 version of the
libraries, though.
Yes, so you used fpcup? If so, I'm happy to update the wiki.

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Leledumbo · 2014-07-29 00:35

Quote from: BigChimp on July 28, 2014, 01:45:02 pmQuote from:
Leledumbo on July 28, 2014, 01:19:47 pmQuote from: BigChimp on July
28, 2014, 09:52:21 am1. You'll see in the table on the fpcup page that
linux x64=>x32 is not supported. It may work, no idea.
Certainly it is, I'm on x86_64-linux and I can compile i386-linux just
fine. Remember you must have ALL required lib32 version of the
libraries, though.
Yes, so you used fpcup? If so, I'm happy to update the wiki.
Err...no. I'm talking from the general point of view.

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BigChimp · 2014-07-29 07:12

Thanks. That's what I suspected

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patyi · 2014-08-03 21:03

Leledumbo, BigChimp !

Thank you for your feedback, but this does not solve the problem. Now
I'm back to 32bit linux (xubunti 04.14 LTS i386) ...

It would be nice to extend the fpcup utility to install the required
libraries and build 64=>32 bit Linux cross compiler,
such as on the Win64 platform, as I see it.

Guys, you two have power, you can do it ! 

Thanks, Patyi.

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BigChimp · 2014-08-04 06:13

Quote from: patyi on August 03, 2014, 11:03:03 pmGuys, you two have
power, you can do it ! 
Great news! Let me know where I can download your patch for fpcup so I
(and Leledeumbo if he wants to), can review it.

Glad you're not one of those guys that justs asks, asks, asks, from
people who freely give open source software and write documentation
without contributing a single thing themselves, and not one of those
guys that cannot even be bothered to read the documentation and act on
it.

Thanks!