I got an offline Ubuntu 20.04. I wanted to use curl, but it wasn’t installed. Trying to install it, needs binutils; tried to install binutils, needs make, tried to install make, needs…gcc!
I seriously didn’t think it was possible to have an Ubuntu without gcc, but here I am, trying to install gcc offline. I’ve followed this stackoverflow question; it doesn’t gives a lot of indications so I’ve read the gnu doc. Here I am a bit lost: seems the prerequisite to install gcc include…gcc, and other things that require gcc to be installed.
So I left out the prerequisite part and started the configuration part.
Here are my step:
- Downloaded latest gcc tar.gz file, uploaded it on my ubuntu (with scp), and extracted (in /home/username, keeping the default directory name gcc-12.1.0)
- made a new dir: /home/username/objdir (lack of imagination here, just following the doc)
- Launch configure from here. According to the doc, it should fail because there’s no cc. Indeed, it fails saying there is no cc.
- Managed to found a cc in my ubuntu, but not in bin; it’s in /lib/gcc/x86_64-linux-gnu/9/cc1. I copy-pasted it in /usr/bin, and renamed it cc instead of cc1. Note that there is nothing else in that /lib/gcc directory, only the cc1 at the end. There is a /lib/cpp executable too, so while I was here I’ve tried a
cpp -v; the result (below) is weird and I don’t really understand it (I guess it won’t be weird for someone who do understand ^^ )
- Relaunch configure. Now it does find cc, but fails at the “check if we are cross compiling” step. It says “error in /home/username/objdir; error: cannot run C compiled programs”.
- The doc says if, for some reason, configure fails to guess the configuration, add –host=… to the command and the host and target will default to be the same as the host machine. So I’ve launched
configure --host=x86_64-pc-linux-gnu(pretty much same name as the dir I found in the /lib/gcc dir, also the one configure writes before failing, so should be good). Now the “check if we are cross-compiling” step pass, saying yes, but next step fails:
- It says to check config.log for more details, so here I go. It looks to me like it has a hard time finding cc version (like, tries multiple options to get it, but none works)
Then it goes to “checking if the C compiler works”, and to my surprise, it says yes
Does other checks that I don’t really understand but it seems happy with it
And then, there is this cross-compiling check, and I really don’t like the output here:
As you can see, it says “stdio.h: No such file or directory.”. At this point, I’m sick of it and would like to kill the man who installed this Ubuntu without anything; but whatever, following this question I figured I need to install libc6-dev. Now I’ve been to ubuntu packages, and searched for libc6-dev in my version. There is quite a lot. I have no idea which I should take, no idea if I will be able to install it (dependencies says libgcc), and I’m tired of this.
Is there any (more simple) way to install gcc on an offline ubuntu, or should I continue to walk this (seemingly infinite) path?
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