[SOLVED]Compiling for 32bit on a 64bit machine?

[Darexon]

I tried compiling for 32 bit linux on my 64 bit machine using this command

Code: Select all

gcc -m32 stuff.c -o bit

and it returns this error:

In file included from /usr/include/stdio.h:27:0,
from stuff.c:1:
/usr/include/features.h:374:25: fatal error: sys/cdefs.h: No such file or directory
compilation terminated.

So I tried getting multilib stuff using these commands

Code: Select all

sudo apt-get install gcc-multilib

and

Code: Select all

sudo apt-get install g++-multilib

and they returned these errors, respectively.

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
gcc-multilib : Depends: gcc-4.7-multilib (>= 4.7.2-1~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
g++-multilib : Depends: gcc-multilib (>= 4:4.7.2-1) but it is not going to be installed
Depends: g++-4.7-multilib (>= 4.7.2-1~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Then I tried getting those dependencies individually but it did not work.

I'm running Wheezy and i'm using some Jessie things such as Steam, Gimp, Gnash and VLC.

[stevepusser]

I'm running Wheezy and i'm using some Jessie things such as Steam, Gimp, Gnash and VLC.

And your apt system is broken as a result.

Stealing from Ballmer:

Backports, backports, backports!

[Darexon]

I'm running Wheezy and i'm using some Jessie things such as Steam, Gimp, Gnash and VLC.

And your apt system is broken as a result.

Stealing from Ballmer:

Backports, backports, backports!

I've installed other things just fine after failing to get those 32 bit libraries.

[vbrummond]

It is likely you have a newer library that you don't have the same version for on 32-bit, and thus 32-bit packages that depend on it will not install. This happens when you mix repositories. Do not get me wrong though, multi-arch is broken even in the best case.

[Darexon]

Solved! I fixed this by instead getting those things from the testing repositories.

[tomazzi]

Solved! I fixed this by instead getting those things from the testing repositories.

Well, in my opinion (which You don't have to agree with) this is NOT solved -> it worked in Your particular case, but it's not a general solution...

Far more secure and easier solution is to use chroot instead of multilib/multiarch - which are simply broken, as it was already said by vbrummond

Of course I'm curious why the hell You're trying to compile a 32-bit version of Linux under 64-bit, instead of using a ready-to-launch installationj (where You're free to choose the range/set of modules to install) - do You use some custom archiecture or am I missing something?

Regards.

[tomazzi]

Solved! I fixed this by instead getting those things from the testing repositories.

Well, in my opinion (which You don't have to agree with) this is NOT solved -> it worked in Your particular case, but it's not a general solution...

Far more secure and easier solution is to use chroot instead of multilib/multiarch - which are simply broken, as it was already said by vbrummond

Of course I'm curious why the hell You're trying to compile a 32-bit version of the program for Linux under 64-bit, instead of using a ready-to-launch installation (where You're free to choose the range/set of modules to install) - do You use some custom archiecture or am I missing something?

...and on the other hand, it's trivially easy to write portable apps, unless You Really have to use some platform-specific asm code...


Regards

[stevepusser]

So you're running a mixed stable/testing system. Good thing that's never caused anybody else any problems.




I mean in the last 5 minutes.